[Feature] add support kimi vl model (#5383)

Co-authored-by: wenju.li <wenju.li@deepctr.cn>

docs/supported_models/vision_language_models.md

@@ -29,3 +29,4 @@ python3 -m sglang.launch_server \
 | **LLaVA-NeXT** (8B, 72B)       | `lmms-lab/llava-next-72b`                        | `chatml-llava`       | Improved LLaVA models (with an 8B Llama3 version and a 72B version) offering enhanced visual instruction-following and accuracy on multimodal benchmarks. |
 | **LLaVA-OneVision**            | `lmms-lab/llava-onevision-qwen2-7b-ov`           | `chatml-llava`       | Enhanced LLaVA variant integrating Qwen as the backbone; supports multiple images (and even video frames) as inputs via an OpenAI Vision API-compatible format. |
 | **Gemma 3 (Multimodal)**       | `google/gemma-3-4b-it`                           | `gemma-it`           | Gemma 3’s larger models (4B, 12B, 27B) accept images (each image encoded as 256 tokens) alongside text in a combined 128K-token context. |
+| **Kimi-VL** (A3B)              | `moonshotai/Kimi-VL-A3B-Instruct`                | `kimi-vl`            | Kimi-VL is a multimodal model that can understand and generate text from images. |

python/pyproject.toml

@@ -42,6 +42,7 @@ runtime_common = [
     "uvicorn",
     "uvloop",
     "xgrammar==0.1.17",
+    "blobfile==3.0.0"
 ]
 
 srt = [

python/sglang/srt/configs/__init__.py

@@ -3,6 +3,8 @@ from sglang.srt.configs.dbrx import DbrxConfig
 from sglang.srt.configs.deepseekvl2 import DeepseekVL2Config
 from sglang.srt.configs.exaone import ExaoneConfig
 from sglang.srt.configs.janus_pro import MultiModalityConfig
+from sglang.srt.configs.kimi_vl import KimiVLConfig
+from sglang.srt.configs.kimi_vl_moonvit import MoonViTConfig
 
 __all__ = [
     "ExaoneConfig",
@@ -10,4 +12,6 @@ __all__ = [
     "DbrxConfig",
     "DeepseekVL2Config",
     "MultiModalityConfig",
+    "KimiVLConfig",
+    "MoonViTConfig",
 ]

python/sglang/srt/configs/kimi_vl.py

+# SPDX-License-Identifier: Apache-2.0
+# Adapted from https://huggingface.co/moonshotai/Kimi-VL-A3B-Instruct/blob/main/configuration_kimi_vl.py
+from typing import Optional, Union
+
+from transformers.configuration_utils import PretrainedConfig
+
+from sglang.srt.configs.deepseekvl2 import DeepseekV2Config
+from sglang.srt.configs.kimi_vl_moonvit import MoonViTConfig
+
+
+class KimiVLConfig(PretrainedConfig):
+    model_type = "kimi_vl"
+
+    def __init__(
+        self,
+        vision_config: Optional[Union[dict, MoonViTConfig]] = None,
+        text_config: Optional[Union[dict, DeepseekV2Config]] = None,
+        ignore_index: int = -100,
+        media_placeholder_token_id: int = 163605,
+        pad_token_id: int = 0,
+        **kwargs
+    ):
+        if vision_config is None:
+            vision_config = MoonViTConfig()
+        elif isinstance(vision_config, dict):
+            vision_config = MoonViTConfig(**vision_config)
+        self.vision_config = vision_config
+
+        if text_config is None:
+            text_config = DeepseekV2Config()
+        elif isinstance(text_config, dict):
+            text_config = DeepseekV2Config(**text_config)
+        self.text_config = text_config
+
+        self.ignore_index = ignore_index
+        self.media_placeholder_token_id = media_placeholder_token_id
+
+        super().__init__(pad_token_id=pad_token_id, **kwargs)

python/sglang/srt/configs/kimi_vl_moonvit.py

+# SPDX-License-Identifier: Apache-2.0
+# Adapted from https://huggingface.co/moonshotai/Kimi-VL-A3B-Instruct/blob/main/configuration_kimi_vl.py
+from transformers.configuration_utils import PretrainedConfig
+
+
+class MoonViTConfig(PretrainedConfig):
+    model_type = "moonvit"
+
+    def __init__(
+        self,
+        patch_size: int = 14,
+        init_pos_emb_height: int = 64,
+        init_pos_emb_width: int = 64,
+        num_attention_heads: int = 16,
+        num_hidden_layers: int = 27,
+        hidden_size: int = 1152,
+        intermediate_size: int = 4304,
+        merge_kernel_size: tuple[int, int] = (2, 2),
+        **kwargs,
+    ):
+        super().__init__(**kwargs)
+        self.patch_size = patch_size
+        # Positional embedding config
+        self.init_pos_emb_height = init_pos_emb_height
+        self.init_pos_emb_width = init_pos_emb_width
+        # Transformer config
+        self.num_hidden_layers = num_hidden_layers
+        self.num_attention_heads = num_attention_heads
+        self.hidden_size = hidden_size
+        self.intermediate_size = intermediate_size
+        # Patch merger config
+        self.merge_kernel_size = merge_kernel_size

python/sglang/srt/configs/model_config.py

@@ -176,6 +176,13 @@ class ModelConfig:
             self.attention_arch = AttentionArch.MLA
             self.kv_lora_rank = self.hf_text_config.kv_lora_rank
             self.qk_rope_head_dim = self.hf_text_config.qk_rope_head_dim
+        elif "KimiVLForConditionalGeneration" in self.hf_config.architectures:
+            self.head_dim = 256
+            self.attention_arch = AttentionArch.MLA
+            self.kv_lora_rank = self.hf_text_config.kv_lora_rank
+            self.qk_rope_head_dim = self.hf_text_config.qk_rope_head_dim
+            self.v_head_dim = self.hf_text_config.v_head_dim
+            self.qk_nope_head_dim = self.hf_text_config.qk_nope_head_dim
         else:
             self.attention_arch = AttentionArch.MHA
 
@@ -530,6 +537,7 @@ multimodal_model_archs = [
     "Qwen2VLForConditionalGeneration",
     "Qwen2_5_VLForConditionalGeneration",
     "CLIPModel",
+    "KimiVLForConditionalGeneration",
 ]
 
 

python/sglang/srt/conversation.py

@@ -806,6 +806,24 @@ register_conv_template(
     )
 )
 
+# Reference: https://huggingface.co/moonshotai/Kimi-VL-A3B-Instruct/blob/main/chat_template.jinja
+register_conv_template(
+    Conversation(
+        name="kimi-vl",
+        system_message="You are a helpful assistant",
+        system_template="<|im_system|>system<|im_middle|>{system_message}",
+        roles=(
+            "<|im_user|>user<|im_middle|>",
+            "<|im_assistant|>assistant<|im_middle|>",
+        ),
+        messages=[],
+        sep="<|im_end|>",
+        sep_style=SeparatorStyle.NO_COLON_SINGLE,
+        stop_str="<|im_end|>",
+        image_token="<|media_start|>image<|media_content|><|media_pad|><|media_end|>",
+    )
+)
+
 
 @register_conv_template_matching_function
 def match_deepseek_janus_pro(model_path: str):
@@ -888,3 +906,10 @@ def match_openbmb_minicpm(model_path: str):
         return "minicpmv"
     elif "minicpm-o" in model_path:
         return "minicpmo"
+
+
+@register_conv_template_matching_function
+def match_moonshot_kimivl(model_path: str):
+    model_path = model_path.lower()
+    if "kimi" in model_path and "vl" in model_path:
+        return "kimi-vl"

python/sglang/srt/hf_transformers_utils.py

@@ -35,6 +35,7 @@ from sglang.srt.configs import (
     DbrxConfig,
     DeepseekVL2Config,
     ExaoneConfig,
+    KimiVLConfig,
     MultiModalityConfig,
 )
 from sglang.srt.connector import create_remote_connector
@@ -46,6 +47,7 @@ _CONFIG_REGISTRY: Dict[str, Type[PretrainedConfig]] = {
     ExaoneConfig.model_type: ExaoneConfig,
     DeepseekVL2Config.model_type: DeepseekVL2Config,
     MultiModalityConfig.model_type: MultiModalityConfig,
+    KimiVLConfig.model_type: KimiVLConfig,
 }
 
 for name, cls in _CONFIG_REGISTRY.items():

python/sglang/srt/managers/multimodal_processors/kimi_vl.py

+import asyncio
+import math
+from typing import List, Union
+
+import torch
+from PIL import Image
+
+from sglang.srt.managers.multimodal_processors.base_processor import (
+    BaseMultimodalProcessor as SGLangBaseProcessor,
+)
+from sglang.srt.managers.multimodal_processors.base_processor import (
+    MultimodalSpecialTokens,
+)
+from sglang.srt.managers.schedule_batch import Modality, MultimodalDataItem
+from sglang.srt.models.kimi_vl import KimiVLForConditionalGeneration
+
+
+# Compatible with KimiVLForConditionalGeneration
+class KimiVLImageProcessor(SGLangBaseProcessor):
+    models = [KimiVLForConditionalGeneration]
+
+    def __init__(self, hf_config, server_args, _processor):
+        super().__init__(hf_config, server_args, _processor)
+        self.IMAGE_TOKEN = "<|media_pad|>"
+        self.im_token_id = _processor.tokenizer.convert_tokens_to_ids(self.IMAGE_TOKEN)
+
+        self.im_start = "<|media_start|>"
+        self.im_start_id = _processor.tokenizer.convert_tokens_to_ids(self.im_start)
+
+        self.im_end = "<|media_end|>"
+        self.im_end_id = _processor.tokenizer.convert_tokens_to_ids(self.im_end)
+
+        self.im_content = "<|media_content|>"
+        self.im_content_id = _processor.tokenizer.convert_tokens_to_ids(self.im_content)
+
+    async def process_mm_data_async(
+        self,
+        image_data: List[Union[str, bytes]],
+        input_text,
+        request_obj,
+        max_req_input_len,
+        *args,
+        **kwargs,
+    ):
+        if not image_data:
+            return None
+        if isinstance(image_data, str):
+            image_data = [image_data]
+
+        base_output = self.load_mm_data(
+            prompt=input_text,
+            image_data=image_data,
+            multimodal_tokens=MultimodalSpecialTokens(image_token=self.IMAGE_TOKEN),
+            max_req_input_len=max_req_input_len,
+        )
+        ret = self.process_mm_data(
+            input_text=base_output.input_text,
+            images=base_output.images,
+        )
+        return {
+            "input_ids": ret["input_ids"].flatten().tolist(),
+            "mm_items": [
+                MultimodalDataItem(
+                    pixel_values=ret["pixel_values"],
+                    image_grid_thws=ret["image_grid_hws"],
+                    modality=Modality.IMAGE,
+                )
+            ],
+            "im_token_id": self.im_token_id,
+            "im_start_id": self.im_start_id,
+            "im_end_id": self.im_end_id,
+            "im_content_id": self.im_content_id,
+        }

python/sglang/srt/models/deepseek_v2.py

@@ -752,7 +752,7 @@ class DeepseekV2AttentionMLA(nn.Module):
         q_nope_out = q_nope_out.transpose(0, 1)
 
         k_nope = latent_cache[..., : self.kv_lora_rank]
-        k_nope = self.kv_a_layernorm(k_nope).unsqueeze(1)
+        k_nope = self.kv_a_layernorm(k_nope.contiguous()).unsqueeze(1)
         k_pe = latent_cache[..., self.kv_lora_rank :].unsqueeze(1)
 
         q_pe, k_pe = self.rotary_emb(positions, q_pe, k_pe)
@@ -1391,6 +1391,9 @@ class DeepseekV2Model(nn.Module):
 
         self.dp_size = get_attention_dp_size()
 
+    def get_input_embeddings(self) -> torch.Tensor:
+        return self.embed_tokens
+
     def forward(
         self,
         input_ids: torch.Tensor,

python/sglang/srt/models/kimi_vl.py

+# SPDX-License-Identifier: Apache-2.0
+# ruff: noqa: E501
+# Adapted from https://huggingface.co/moonshotai/Kimi-VL-A3B-Instruct/blob/main/modeling_kimi_vl.py
+# Copyright 2025 The Moonshot AI Team, DeepSeek-AI, and HuggingFace Inc. team. All rights reserved.
+#
+# The code is based on llava (llava/modeling_llava.py) and DeepSeek-V3 (DeepSeek-V3/modeling_deepseek.py), but modified for KimiVL.
+#
+# Licensing Information:
+# - Code derived from llava (llava/modeling_llava.py) and DeepSeek-V3 (DeepSeek-V3/modeling_deepseek.py) is licensed under the Apache License, Version 2.0.
+# - Other parts of the code are licensed under the MIT License.
+#
+# Apache License, Version 2.0:
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# MIT License:
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+import copy
+import logging
+import math
+from collections.abc import Mapping
+from dataclasses import dataclass
+from typing import Any, Iterable, List, Optional, Tuple
+
+import torch
+from torch import nn
+from transformers.activations import GELUActivation
+
+from sglang.srt.configs import KimiVLConfig
+from sglang.srt.configs.deepseekvl2 import DeepseekV2Config
+from sglang.srt.configs.kimi_vl import KimiVLConfig
+from sglang.srt.configs.kimi_vl_moonvit import MoonViTConfig
+from sglang.srt.distributed import (
+    get_tensor_model_parallel_rank,
+    get_tensor_model_parallel_world_size,
+)
+from sglang.srt.layers.activation import QuickGELU
+from sglang.srt.layers.moe.fused_moe_triton import FusedMoE
+from sglang.srt.layers.quantization.base_config import QuantizationConfig
+from sglang.srt.managers.mm_utils import (
+    MultiModalityDataPaddingPatternMultimodalTokens,
+    general_mm_embed_routine,
+)
+from sglang.srt.managers.schedule_batch import MultimodalDataItem, MultimodalInputs
+from sglang.srt.model_executor.forward_batch_info import ForwardBatch
+from sglang.srt.model_loader.weight_utils import (
+    default_weight_loader,
+    maybe_remap_kv_scale_name,
+)
+from sglang.srt.models.deepseek_v2 import DeepseekV2ForCausalLM
+from sglang.srt.models.kimi_vl_moonvit import MoonVitPretrainedModel
+from sglang.srt.utils import add_prefix
+
+logger = logging.getLogger(__name__)
+
+
+# For dummy input only
+@dataclass
+class MaxImageTokenMeta:
+    width: int = 1024
+    height: int = 1024
+
+
+class KimiVLMultiModalProjector(nn.Module):
+
+    def __init__(self, config: KimiVLConfig):
+        super().__init__()
+
+        self.hidden_size = (
+            config.vision_config.hidden_size
+            * config.vision_config.merge_kernel_size[0]
+            * config.vision_config.merge_kernel_size[1]
+        )
+
+        self.pre_norm = torch.nn.LayerNorm(config.vision_config.hidden_size, eps=1e-5)
+        self.linear_1 = nn.Linear(self.hidden_size, self.hidden_size, bias=True)
+        self.act = GELUActivation()
+        self.act = QuickGELU()
+        self.linear_2 = nn.Linear(
+            self.hidden_size, config.text_config.hidden_size, bias=True
+        )
+
+    def forward(self, image_features: torch.Tensor) -> torch.Tensor:
+        hidden_states = self.pre_norm(image_features).view(-1, self.hidden_size)
+        hidden_states = self.linear_1(hidden_states)
+        hidden_states = self.act(hidden_states)
+        hidden_states = self.linear_2(hidden_states)
+        return hidden_states
+
+
+class KimiVLForConditionalGeneration(nn.Module):
+    def __init__(
+        self,
+        config: KimiVLConfig,
+        quant_config: Optional[QuantizationConfig] = None,
+        prefix: str = "",
+        **kwargs,  # fix init_tts argument error
+    ) -> None:
+        super().__init__()
+        self.config = config
+        assert isinstance(config.vision_config, MoonViTConfig)
+
+        self.vision_tower = MoonVitPretrainedModel(config.vision_config)
+
+        self.multi_modal_projector = KimiVLMultiModalProjector(config=config)
+        self.quant_config = quant_config
+        text_config = copy.deepcopy(config.text_config)
+        text_config.architectures = ["DeepseekV2ForCausalLM"]
+        self.language_model = DeepseekV2ForCausalLM(
+            config=text_config,
+            quant_config=quant_config,
+            prefix=add_prefix("language_model", prefix),
+        )
+
+    def get_image_feature(self, items: List[MultimodalDataItem]) -> torch.Tensor:
+        pixel_values = (
+            torch.cat([item.pixel_values for item in items], dim=0)
+            .type(self.vision_tower.dtype)
+            .to(self.vision_tower.device)
+        )
+        image_grid_thws = torch.concat(
+            [item.image_grid_thws for item in items], dim=0
+        ).to(self.vision_tower.device)
+        image_features = self.vision_tower(pixel_values, image_grid_thws)
+        assert isinstance(image_features, list)
+        # lengths = [x.shape[0] for x in image_features]
+        res = self.multi_modal_projector(torch.cat(image_features))  # .split(lengths)
+        return res
+
+    def pad_input_ids(self, input_ids: List[int], mm_inputs: MultimodalInputs):
+        # Get all special token IDs
+        pattern = MultiModalityDataPaddingPatternMultimodalTokens(mm_inputs.im_token_id)
+        return pattern.pad_input_tokens(input_ids, mm_inputs)
+
+    def forward(
+        self,
+        input_ids: torch.Tensor,
+        positions: torch.Tensor,
+        forward_batch: ForwardBatch,
+        get_embedding: bool = False,
+    ):
+        hidden_states = general_mm_embed_routine(
+            input_ids=input_ids,
+            forward_batch=forward_batch,
+            language_model=self.language_model,
+            image_data_embedding_func=self.get_image_feature,
+            positions=positions,
+        )
+
+        return hidden_states
+
+    def load_weights(self, weights: Iterable[Tuple[str, torch.Tensor]]):
+        config = self.config.text_config
+        _KEYS_TO_MODIFY_MAPPING = {
+            # "language_model.lm_head": "lm_head",
+            # "language_model.model": "language_model",
+        }
+        # only doing this for language model part for now.
+        stacked_params_mapping = [
+            # (param_name, shard_name, shard_id)
+            (".gate_up_proj", ".gate_proj", 0),
+            (".gate_up_proj", ".up_proj", 1),
+        ]
+        if not config.use_mla:
+            stacked_params_mapping += [
+                (".qkv_proj", ".q_proj", "q"),
+                (".qkv_proj", ".k_proj", "k"),
+                (".qkv_proj", ".v_proj", "v"),
+            ]
+        if getattr(config, "n_routed_experts", None):
+            # Params for weights, fp8 weight scales, fp8 activation scales
+            # (param_name, weight_name, expert_id, shard_id)
+            expert_params_mapping = FusedMoE.make_expert_params_mapping(
+                ckpt_gate_proj_name="gate_proj",
+                ckpt_down_proj_name="down_proj",
+                ckpt_up_proj_name="up_proj",
+                num_experts=config.n_routed_experts,
+            )
+        else:
+            expert_params_mapping = []
+
+        params_dict = dict(self.named_parameters())
+        for args in weights:
+            name, loaded_weight = args[:2]
+            kwargs = args[2] if len(args) > 2 else {}
+            if "rotary_emb.inv_freq" in name:
+                continue
+
+            spec_layer = get_spec_layer_idx_from_weight_name(config, name)
+            if spec_layer is not None:
+                continue  # skip spec decode layers for main model
+
+            if "rotary_emb.cos_cached" in name or "rotary_emb.sin_cached" in name:
+                # Models trained using ColossalAI may include these tensors in
+                # the checkpoint. Skip them.
+                continue
+            for key_to_modify, new_key in _KEYS_TO_MODIFY_MAPPING.items():
+                if key_to_modify in name:
+                    name = name.replace(key_to_modify, new_key)
+            use_default_weight_loading = False
+            if "vision" in name:
+                if self.vision_tower is not None:
+                    # We only do sharding for language model and
+                    # not vision model for now.
+                    use_default_weight_loading = True
+            else:
+                for param_name, weight_name, shard_id in stacked_params_mapping:
+                    if weight_name not in name:
+                        continue
+                    # We have mlp.experts[0].gate_proj in the checkpoint.
+                    # Since we handle the experts below in expert_params_mapping,
+                    # we need to skip here BEFORE we update the name, otherwise
+                    # name will be updated to mlp.experts[0].gate_up_proj, which
+                    # will then be updated below in expert_params_mapping
+                    # for mlp.experts[0].gate_gate_up_proj, which breaks load.
+                    if ("mlp.experts." in name) and name not in params_dict:
+                        continue
+                    name = name.replace(weight_name, param_name)
+                    # Skip loading extra bias for GPTQ models.
+                    if name.endswith(".bias") and name not in params_dict:
+                        continue
+
+                    param = params_dict[name]
+                    weight_loader = param.weight_loader
+                    weight_loader(param, loaded_weight, shard_id, **kwargs)
+                    break
+                else:
+                    for idx, (
+                        param_name,
+                        weight_name,
+                        expert_id,
+                        shard_id,
+                    ) in enumerate(expert_params_mapping):
+                        if weight_name not in name:
+                            continue
+                        name = name.replace(weight_name, param_name)
+
+                        param = params_dict[name]
+                        weight_loader = param.weight_loader
+                        weight_loader(
+                            param,
+                            loaded_weight,
+                            name,
+                            expert_id=expert_id,
+                            shard_id=shard_id,
+                            **kwargs,
+                        )
+                        break
+                    else:
+                        use_default_weight_loading = True
+            if use_default_weight_loading:
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
+                # Remapping the name of FP8 kv-scale.
+                name = maybe_remap_kv_scale_name(name, params_dict)
+                if name is None:
+                    continue
+
+                # if is_pp_missing_parameter(name, self):
+                #     continue
+
+                param = params_dict[name]
+                weight_loader = getattr(param, "weight_loader", default_weight_loader)
+                weight_loader(param, loaded_weight, **kwargs)
+        self.language_model.post_load_weights()
+
+
+def get_spec_layer_idx_from_weight_name(
+    config: DeepseekV2Config, weight_name: str
+) -> Optional[int]:
+    if hasattr(config, "num_nextn_predict_layers") and (
+        config.num_nextn_predict_layers > 0
+    ):
+        layer_idx = config.num_hidden_layers
+        for i in range(config.num_nextn_predict_layers):
+            if weight_name.startswith(f"model.layers.{layer_idx+i}."):
+                return layer_idx + i
+    return None
+
+
+EntryClass = [KimiVLForConditionalGeneration]

python/sglang/srt/models/kimi_vl_moonvit.py

+# SPDX-License-Identifier: Apache-2.0
+# ruff: noqa: E501
+# Adapted from https://huggingface.co/moonshotai/Kimi-VL-A3B-Instruct/blob/main/modeling_kimi_vl.py
+# This file is meant to be used in kimi_vl.py only
+# Copyright 2025 The Moonshot AI Team, DeepSeek-AI, and HuggingFace Inc. team. All rights reserved.
+#
+# The code is based on llava (llava/modeling_llava.py) and DeepSeek-V3 (DeepSeek-V3/modeling_deepseek.py), but modified for KimiVL.
+#
+# Licensing Information:
+# - Code derived from llava (llava/modeling_llava.py) and DeepSeek-V3 (DeepSeek-V3/modeling_deepseek.py) is licensed under the Apache License, Version 2.0.
+# - Other parts of the code are licensed under the MIT License.
+#
+# Apache License, Version 2.0:
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# MIT License:
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+import math
+from copy import deepcopy
+from functools import cached_property
+from typing import List, Optional, Sequence, Tuple, Union
+
+import torch
+import torch.nn as nn
+import torch.nn.functional as F
+from transformers.activations import ACT2FN, PytorchGELUTanh
+from transformers.modeling_utils import PreTrainedModel
+
+try:
+    from flash_attn.flash_attn_interface import flash_attn_varlen_func
+except ImportError:
+    flash_attn_varlen_func = None
+
+from sglang.srt.configs import MoonViTConfig
+
+
+def multihead_attention(
+    q: torch.Tensor,
+    k: torch.Tensor,
+    v: torch.Tensor,
+    q_cu_seqlens: Optional[torch.Tensor] = None,
+    k_cu_seqlens: Optional[torch.Tensor] = None,
+):
+    """Multi-head attention using flash attention 2.
+    This function is used to handle the case where the query, key, and value are packed.
+    Args:
+        q, k, v: tensor of shape (tot_seqlens, num_heads, head_dim).
+        q_cu_seqlens (torch.Tensor): cumulative sequence lengths of q.
+            The first element should be 0 and the last element should be q.shape[0].
+        k_cu_seqlens (torch.Tensor): cumulative sequence lengths of k.
+            The first element should be 0 and the last element should be k.shape[0].
+
+    Returns:
+        output: shape (batch_size, seqlen, dim) or (tot_seqlens, dim) if packing,
+            where dim = num_heads * head_dim
+    """
+    if flash_attn_varlen_func is None:
+        raise ImportError(
+            "flash_attn is not installed, this function needs flash_attn_varlen_func from flash_attn"
+        )
+    # Unified format legal check
+    assert q.dim() == k.dim() == v.dim() == 3, "q, k, v must have 3 dims"
+    assert q_cu_seqlens[-1] == q.shape[0], "q_cu_seqlens must sum to q.shape[0]"
+    assert (
+        k_cu_seqlens[-1] == k.shape[0] == v.shape[0]
+    ), "k_cu_seqlens must sum to k.shape[0]"
+    assert q.dtype in [
+        torch.bfloat16,
+        torch.float16,
+    ], f"unsupported dtype {q.dtype} for multihead attn"
+
+    max_seqlen_q = (q_cu_seqlens[1:] - q_cu_seqlens[:-1]).max().item()
+    max_seqlen_k = (k_cu_seqlens[1:] - k_cu_seqlens[:-1]).max().item()
+    attn_out = flash_attn_varlen_func(
+        q,
+        k,
+        v,
+        q_cu_seqlens,
+        k_cu_seqlens,
+        max_seqlen_q,
+        max_seqlen_k,
+        causal=False,
+    )
+    attn_out = attn_out.flatten(start_dim=-2)
+
+    return attn_out
+
+
+def sdpa_attention(
+    q: torch.Tensor,
+    k: torch.Tensor,
+    v: torch.Tensor,
+    q_cu_seqlens: Optional[torch.Tensor] = None,
+    k_cu_seqlens: Optional[torch.Tensor] = None,
+) -> torch.Tensor:
+    """Multi-head attention using torch scaled dot product attention.
+    This function is used to handle the case where the query, key, and value are packed.
+    Args:
+        q, k, v: tensor of shape (tot_seqlens, num_heads, head_dim).
+        q_cu_seqlens (torch.Tensor): cumulative sequence lengths of q.
+            The first element should be 0 and the last element should be q.shape[0].
+        k_cu_seqlens (torch.Tensor): cumulative sequence lengths of k.
+            The first element should be 0 and the last element should be k.shape[0].
+
+    Returns:
+        output: shape (batch_size, seqlen, dim) or (tot_seqlens, dim) if packing,
+            where dim = num_heads * head_dim
+    """
+    # Unified format legal check
+    assert q.dim() == k.dim() == v.dim() == 3, "q, k, v must have 3 dims"
+    assert q_cu_seqlens[-1] == q.shape[0], "q_cu_seqlens must sum to q.shape[0]"
+    seq_length = q.shape[0]
+    attention_mask = torch.zeros(
+        [1, seq_length, seq_length], device=q.device, dtype=torch.bool
+    )
+    for i in range(1, len(q_cu_seqlens)):
+        attention_mask[
+            ...,
+            q_cu_seqlens[i - 1] : q_cu_seqlens[i],
+            q_cu_seqlens[i - 1] : q_cu_seqlens[i],
+        ] = True
+    q = q.transpose(0, 1)
+    k = k.transpose(0, 1)
+    v = v.transpose(0, 1)
+    attn_output = F.scaled_dot_product_attention(q, k, v, attention_mask, dropout_p=0.0)
+    attn_output = attn_output.transpose(0, 1)
+    attn_output = attn_output.reshape(seq_length, -1)
+    return attn_output
+
+
+VL_VISION_ATTENTION_FUNCTIONS = {
+    "flash_attention_2": multihead_attention,
+    "sdpa": sdpa_attention,
+}
+
+
+def _apply_rope_input_validation(x, freqs_cis):
+    assert x.ndim == freqs_cis.ndim + 1, (x.shape, freqs_cis.shape)
+    assert x.shape[:-2] == freqs_cis.shape[:-1], (x.shape, freqs_cis.shape)
+    assert x.shape[-1] == 2 * freqs_cis.shape[-1], (x.shape, freqs_cis.shape)
+    assert freqs_cis.dtype == torch.complex64, freqs_cis.dtype
+
+
+def apply_rope(
+    xq: torch.Tensor, xk: torch.Tensor, freqs_cis: torch.Tensor
+) -> tuple[torch.Tensor, torch.Tensor]:
+    """
+    Args: (The leading dimensions of all inputs should be the same)
+        xq: query, tensor of shape (..., num_heads, head_dim)
+        xk: key, tensor of shape (..., num_heads, head_dim)
+        freqs_cis: tensor of shape (..., head_dim/2), dtype=torch.complex64. It contains the precomputed cis(freqs) for each position in the 2D grid.
+    Returns:
+        xq_out, xk_out: tensors of shape (..., num_heads, head_dim)
+    """
+    _apply_rope_input_validation(xq, freqs_cis)
+    _apply_rope_input_validation(xk, freqs_cis)
+
+    freqs_cis = freqs_cis.unsqueeze(-2)  # ..., 1, head_dim/2
+    # ..., num_heads, head_dim/2
+    xq_ = torch.view_as_complex(xq.float().view(*xq.shape[:-1], -1, 2))
+    xk_ = torch.view_as_complex(xk.float().view(*xq.shape[:-1], -1, 2))
+    xq_out = torch.view_as_real(xq_ * freqs_cis).flatten(-2)  # ..., num_heads, head_dim
+    xk_out = torch.view_as_real(xk_ * freqs_cis).flatten(-2)  # ..., num_heads, head_dim
+    return xq_out.type_as(xq), xk_out.type_as(xk)
+
+
+class Learnable2DInterpPosEmb(nn.Module):
+
+    def __init__(
+        self, height: int, width: int, dim: int, interpolation_mode: str = "bicubic"
+    ) -> None:
+        super().__init__()
+        self.height = height
+        self.width = width
+        self.interpolation_mode = interpolation_mode
+        self.weight = nn.Parameter(torch.empty(height, width, dim))
+        self.reset_parameters()
+
+    def reset_parameters(self):
+        nn.init.normal_(self.weight)
+
+    def forward(self, x: torch.Tensor, grid_hws: torch.Tensor) -> torch.Tensor:
+        pos_embs = []
+        for shape in grid_hws.tolist():
+            if shape == self.weight.shape[:-1]:
+                pos_embs.append(self.weight.flatten(end_dim=1))
+            else:
+                pos_embs.append(
+                    F.interpolate(
+                        self.weight.permute((2, 0, 1)).unsqueeze(0),
+                        size=shape,
+                        mode=self.interpolation_mode,
+                    )
+                    .squeeze(0)
+                    .permute((1, 2, 0))
+                    .flatten(end_dim=1)
+                )
+        out = x + torch.cat(pos_embs)
+        return out
+
+
+class MoonVisionPatchEmbed(nn.Module):
+
+    def __init__(
+        self,
+        out_dim: int,
+        in_dim: int = 3,
+        patch_size: Union[int, Tuple[int, int]] = (14, 14),
+        pos_emb_height: int = 14,
+        pos_emb_width: int = 14,
+    ):
+        super().__init__()
+        assert isinstance(
+            patch_size, (int, Sequence)
+        ), f"Invalid patch_size type: {type(patch_size)}"
+        if isinstance(patch_size, int):
+            patch_size = (patch_size, patch_size)
+        assert (
+            len(patch_size) == 2
+        ), f"Expected patch_size to be a tuple of 2, got {patch_size}"
+        self.patch_size = patch_size
+
+        self.proj = nn.Conv2d(
+            in_dim, out_dim, kernel_size=patch_size, stride=patch_size
+        )
+
+        self.pos_emb = Learnable2DInterpPosEmb(
+            height=pos_emb_height, width=pos_emb_width, dim=out_dim
+        )
+
+    def forward(self, x: torch.Tensor, grid_hw: torch.Tensor) -> torch.Tensor:
+        """
+        Args:
+            x (L, Channels): input tensor
+            grid_hw (N, 2): grid height and width
+
+        Returns:
+            (L, Cout) tensor
+        """
+        x = self.proj(x).view(x.size(0), -1)
+        # apply positional embedding
+        x = self.pos_emb(x, grid_hw)
+        return x
+
+
+class Rope2DPosEmb(nn.Module):
+    """2D rotary position embedding with multi-resolution support.
+
+    This class is intended to be used in the following way:
+    1. Before training, create an instance of Rope2DPosEmb. This instance will hold the precomputed cis.
+    2. Before each forward pass, call `get_freqs_cis_by_*` to get the `freqs_cis` tensor for this iteration.
+    3. During the forward pass, pass the `freqs_cis` tensor to each attention layer, and call `apply` just before each attention operation.
+        The rope is shared across all attention layers and all heads.
+
+    Refs:
+    - RoFormer: https://arxiv.org/abs/2104.09864
+    - VisionLLaMA: https://arxiv.org/abs/2403.00522
+    - https://github.com/Meituan-AutoML/VisionLLaMA/blob/main/dit/models.py
+
+    Args:
+        dim (int): usually the multi-head attention dimension, should be divisible by 4 (TODO: relax this constraint if needed)
+        max_height (int): the maximum height of the 2D grid
+        max_width (int): the maximum width of the 2D grid
+        theta_base (float): the base of the theta
+        device (str): the device to store the precomputed cis
+    """
+
+    def __init__(
+        self, dim: int, max_height: int, max_width: int, theta_base=10000, device="cuda"
+    ):
+        super().__init__()
+        self.dim = dim
+        assert self.dim % 4 == 0, "dim must be divisible by 4"
+        self.max_height = max_height
+        self.max_width = max_width
+        self.theta_base = theta_base
+        self.device = device
+
+    def extra_repr(self):
+        return f"dim={self.dim}, max_height={self.max_height}, max_width={self.max_width}, theta_base={self.theta_base}"
+
+    @cached_property
+    def precomputed_freqs_cis(self) -> torch.Tensor:
+        """Calculate the cis(freqs) for each position in the 2D grid.
+
+        Return: complex tensor of shape (max_height, max_width, dim//2) and value:
+            height axis: ret[h, w, 2*i] = cis(h * theta_base**(-4*i/dim))
+            weight axis: ret[h, w, 2*i+1] = cis(w * theta_base**(-4*i/dim))   with (i in [0, dim//4))
+            note: `cis` is a mathematical notation defined by cis x = cos x + i sin x,
+        """
+        N = self.max_height * self.max_width
+        flat_pos = torch.arange(0, N).float().to(self.device)
+        x_pos = flat_pos % self.max_width
+        y_pos = flat_pos // self.max_width
+        dim_range = (
+            torch.arange(0, self.dim, 4)[: (self.dim // 4)].float().to(self.device)
+        )  # C/4
+        freqs = 1.0 / (self.theta_base ** (dim_range / self.dim))
+        x_freqs = torch.outer(x_pos, freqs).float()  # N, C/4
+        y_freqs = torch.outer(y_pos, freqs).float()  # N, C/4
+        x_cis = torch.polar(torch.ones_like(x_freqs), x_freqs)  # N, C/4
+        y_cis = torch.polar(torch.ones_like(y_freqs), y_freqs)  # N, C/4
+        # N, C/4, 2
+        freqs_cis = torch.cat(
+            [x_cis.unsqueeze(dim=-1), y_cis.unsqueeze(dim=-1)], dim=-1
+        )
+        # max_height, max_width, C/2
+        freqs_cis = freqs_cis.reshape(self.max_height, self.max_width, -1)
+        return freqs_cis
+
+    def get_freqs_cis_by_seqlens(self, grid_hws: torch.Tensor) -> torch.Tensor:
+        """
+        Args:
+            grid_hws (torch.Tensor): containing list of (height, width) or (t, height, width) tuples.
+        Returns:
+            freqs_cis: tensor of shape (sum(t * height * width), dim//2)
+        """
+        shapes = grid_hws.tolist()
+        assert all(
+            1 <= h <= self.max_height and 1 <= w <= self.max_width for h, w in shapes
+        ), (
+            shapes,
+            self.max_height,
+            self.max_width,
+        )
+        freqs_cis = torch.cat(
+            [
+                self.precomputed_freqs_cis[:h, :w].reshape(-1, self.dim // 2)
+                for h, w in shapes
+            ],
+            dim=0,
+        )
+        return freqs_cis
+
+    def get_freqs_cis_by_idx(
+        self, pos_idx: torch.Tensor, pos_idx_mask: torch.Tensor
+    ) -> torch.Tensor:
+        """
+        Args:
+            pos_idx: tensor of shape (..., 2), It contains the (h, w) position indices of each 2D token.
+            pos_idx_mask: a mask of shape (...), the leading dimensions should be the same as pos_idx.
+                Rope will only be applied to the tokens with True mask. `freqs_cis` for the tokens with False mask with be ones.
+        Return:
+            freqs_cis: tensor of shape (..., dim//2)
+        """
+        assert (
+            pos_idx.shape[:-1] == pos_idx_mask.shape
+            and pos_idx.shape[-1] == 2
+            and pos_idx.ndim == pos_idx_mask.ndim + 1
+        ), (pos_idx.shape, pos_idx_mask.shape)
+        assert pos_idx_mask.dtype == torch.bool, pos_idx_mask.dtype
+
+        shp = pos_idx_mask.shape + (self.dim // 2,)  # ..., head_dim/2
+        freqs_cis = torch.ones(
+            shp, dtype=torch.complex64, device=self.device
+        )  # ..., head_dim/2
+        freqs_cis[pos_idx_mask] = self.precomputed_freqs_cis[
+            pos_idx[..., 0][pos_idx_mask], pos_idx[..., 1][pos_idx_mask]
+        ]
+        return freqs_cis
+
+
+class MLP2(nn.Module):
+    """
+    Args:
+        dims: [in_dim, hidden_dim, out_dim]
+        bias: whether to use bias in linear layer.
+    """
+
+    def __init__(self, dims: list[int], activation, bias=True):
+        super().__init__()
+        assert len(dims) == 3
+        self.fc0 = nn.Linear(dims[0], dims[1], bias=bias)
+        self.fc1 = nn.Linear(dims[1], dims[2], bias=bias)
+        self.activation = activation
+        for m in [self.fc0, self.fc1]:
+            nn.init.trunc_normal_(m.weight, std=math.sqrt(2 / m.in_features))
+            if m.bias is not None:
+                nn.init.zeros_(m.bias)
+
+    def forward(self, x: torch.Tensor) -> torch.Tensor:
+        x = self.fc0(x)
+        x = self.activation(x)
+        return self.fc1(x)
+
+
+class MoonVitEncoderLayer(nn.Module):
+
+    def __init__(
+        self,
+        num_heads: int,
+        hidden_dim: int,
+        mlp_dim: int,
+        *,
+        attn_implementation: str = "flash_attention_2",  # use fa2 in sglang by default
+        activation=F.gelu,
+        attn_bias: bool = False,
+    ):
+        super().__init__()
+        self.num_heads = num_heads
+        self.hidden_dim = hidden_dim
+        self.hidden_size_per_attention_head = self.hidden_dim // self.num_heads
+        self.attn_implementation = attn_implementation
+
+        self.norm0 = nn.LayerNorm(hidden_dim)
+        self.norm1 = nn.LayerNorm(hidden_dim)
+        self.mlp = MLP2([hidden_dim, mlp_dim, hidden_dim], activation)
+        self.wqkv = nn.Linear(hidden_dim, hidden_dim * 3, bias=attn_bias)
+        self.wo = nn.Linear(hidden_dim, hidden_dim, bias=attn_bias)
+
+    def attention_qkvpacked(
+        self,
+        x: torch.Tensor,
+        cu_seqlens: torch.Tensor,
+        rope_freqs_cis: Optional[torch.Tensor] = None,
+    ):
+        """
+        Args:
+            x (torch.Tensor): (batch_size, seqlen, hidden_dim)
+            cu_seqlens (torch.Tensor):
+        """
+        xqkv = self.wqkv(x)
+
+        qkv_shape = xqkv.size()[:-1] + (
+            3,
+            self.num_heads,
+            self.hidden_size_per_attention_head,
+        )
+        # xqkv: (batch_size, seqlen, 3, nheads, headdim)
+        xqkv = xqkv.view(*qkv_shape)
+        xq, xk, xv = torch.unbind(xqkv, dim=-3)
+
+        xq, xk = apply_rope(xq, xk, rope_freqs_cis)
+
+        attn_func = VL_VISION_ATTENTION_FUNCTIONS[self.attn_implementation]
+        attn_out = attn_func(
+            xq, xk, xv, q_cu_seqlens=cu_seqlens, k_cu_seqlens=cu_seqlens
+        )
+
+        attn_out = self.wo(attn_out)
+        return attn_out
+
+    def forward(
+        self,
+        hidden_states: torch.Tensor,
+        cu_seqlens: torch.Tensor,
+        rope_freqs_cis: Union[torch.Tensor, None] = None,
+    ) -> torch.Tensor:
+        """
+        Args:
+            hidden_states: non-packed (B, N, D) or packed (L, D). if non-packed, seqlens should be None, if packed, seqlens should be set
+
+        Returns:
+            output: same shape of input, non-packed (B, N, D) for non-packed input, (L, D) for packed input
+        """
+        residual = hidden_states
+        hidden_states = self.norm0(hidden_states)
+        attn_out = self.attention_qkvpacked(
+            hidden_states, cu_seqlens, rope_freqs_cis=rope_freqs_cis
+        )
+        hidden_states = residual + attn_out
+
+        residual = hidden_states
+        hidden_states = self.mlp(self.norm1(hidden_states))
+        hidden_states = residual + hidden_states
+        return hidden_states
+
+
+class MoonVitEncoder(nn.Module):
+
+    def __init__(
+        self,
+        hidden_dim: int,
+        num_layers: int,
+        block_cfg: dict,
+    ) -> None:
+        super().__init__()
+
+        self.rope_2d = Rope2DPosEmb(
+            block_cfg["hidden_dim"] // block_cfg["num_heads"], 512, 512
+        )
+        self.blocks = nn.ModuleList(
+            [MoonVitEncoderLayer(**block_cfg) for _ in range(num_layers)]
+        )
+        self.final_layernorm = nn.LayerNorm(hidden_dim)
+
+    def forward(
+        self, hidden_states: torch.Tensor, grid_hw: torch.Tensor
+    ) -> torch.Tensor:
+        rope_freqs_cis = self.rope_2d.get_freqs_cis_by_seqlens(grid_hws=grid_hw)
+
+        lengths = torch.cat(
+            (
+                torch.zeros(1, device=hidden_states.device, dtype=grid_hw.dtype),
+                grid_hw[:, 0] * grid_hw[:, 1],
+            )
+        )
+        cu_seqlens = lengths.cumsum(dim=0, dtype=torch.int32)
+
+        for _, block in enumerate(self.blocks):
+            hidden_states = block(
+                hidden_states, cu_seqlens, rope_freqs_cis=rope_freqs_cis
+            )
+
+        hidden_states = self.final_layernorm(hidden_states)
+
+        return hidden_states
+
+
+def patch_merger(
+    x: torch.Tensor,
+    grid_hw: torch.Tensor,
+    merge_kernel_size: list[int, int] = (2, 2),
+) -> List[torch.Tensor]:
+    d_model = x.size(-1)
+
+    outputs = []
+    pre_sum = 0
+    for x_shape in grid_hw.tolist():
+        height, width = x_shape[0], x_shape[1]
+        # Get the current sequence
+        seq = x[pre_sum : pre_sum + height * width]
+        # Reshape along self.merge_kernel_size and concat to the last dimension
+        kernel_height, kernel_width = merge_kernel_size
+        new_height, new_width = height // kernel_height, width // kernel_width
+        reshaped_seq = seq.view(
+            new_height, kernel_height, new_width, kernel_width, d_model
+        )
+        reshaped_seq = reshaped_seq.permute(0, 2, 1, 3, 4).contiguous()
+        padded_seq = reshaped_seq.view(
+            new_height * new_width, kernel_height * kernel_width, -1
+        )
+        outputs.append(padded_seq)
+        pre_sum += height * width
+
+    return outputs
+
+
+class MoonVitVLProjector(nn.Module):
+
+    def __init__(
+        self,
+        in_channels: int,
+        merge_kernel_size: list[int, int],
+        hidden_act: str = "gelu",
+        ln_eps: float = 1e-5,
+        out_dim: int = 4096,
+    ):
+        super().__init__()
+        self.hidden_size = in_channels * merge_kernel_size[0] * merge_kernel_size[1]
+
+        self.pre_norm = nn.nn.LayerNorm(in_channels, eps=ln_eps)
+        self.linear_1 = nn.Linear(self.hidden_size, self.hidden_size, bias=True)
+        self.act = ACT2FN[hidden_act]
+        self.linear_2 = nn.Linear(self.hidden_size, out_dim, bias=True)
+
+    def forward(self, hidden_states: torch.Tensor) -> torch.Tensor:
+        hidden_states = self.pre_norm(hidden_states).view(-1, self.hidden_size)
+        hidden_states = self.linear_1(hidden_states)
+        hidden_states = self.act(hidden_states)
+        hidden_states = self.linear_2(hidden_states)
+        return hidden_states
+
+
+class MoonVitPretrainedModel(PreTrainedModel):
+    config_class = MoonViTConfig
+    model_type = "moonvit"
+    _no_split_modules = ["PackingTransformer"]
+    _supports_flash_attn_2 = True
+    _supports_sdpa = True
+
+    def __init__(self, config: MoonViTConfig, *inputs, **kwargs):
+        super().__init__(config, *inputs, **kwargs)
+        config = deepcopy(config)
+        self.merge_kernel_size = config.merge_kernel_size
+        self.patch_size = config.patch_size
+        self.patch_embed = MoonVisionPatchEmbed(
+            out_dim=config.hidden_size,
+            patch_size=config.patch_size,
+            pos_emb_height=config.init_pos_emb_height,
+            pos_emb_width=config.init_pos_emb_width,
+        )
+
+        self.encoder = MoonVitEncoder(
+            hidden_dim=config.hidden_size,
+            num_layers=config.num_hidden_layers,
+            block_cfg={
+                "num_heads": config.num_attention_heads,
+                "hidden_dim": config.hidden_size,
+                "mlp_dim": config.intermediate_size,
+                "activation": PytorchGELUTanh(),
+                "attn_bias": True,
+                "attn_implementation": config._attn_implementation,
+            },
+        )
+
+    def forward(
+        self, pixel_values: torch.Tensor, grid_hw: torch.Tensor
+    ) -> torch.Tensor:
+        """
+        Args:
+            pixel_values (torch.Tensor): The input pixel values.
+            grid_hw (torch.Tensor): The grid height and width.
+
+        Returns:
+            torch.Tensor: The output tokens.
+        """
+        hidden_states = self.patch_embed(pixel_values, grid_hw)
+        hidden_states = self.encoder(hidden_states, grid_hw)
+        hidden_states = patch_merger(
+            hidden_states, grid_hw, merge_kernel_size=self.merge_kernel_size
+        )
+        return hidden_states

test/srt/test_vision_openai_server.py

@@ -81,10 +81,20 @@ class TestOpenAIVisionServer(CustomTestCase):
         text = response.choices[0].message.content
         assert isinstance(text, str)
         # `driver` is for gemma-3-it
-        assert "man" in text or "person" or "driver" in text, text
-        assert "cab" in text or "taxi" in text or "SUV" in text, text
+        assert (
+            "man" in text or "person" or "driver" in text
+        ), f"text: {text}, should contain man, person or driver"
+        assert (
+            "cab" in text
+            or "taxi" in text
+            or "SUV" in text
+            or "vehicle" in text
+            or "car" in text
+        ), f"text: {text}, should contain cab, taxi, SUV, vehicle or car"
         # MiniCPMO fails to recognize `iron`, but `hanging`
-        assert "iron" in text or "hang" in text, text
+        assert (
+            "iron" in text or "hang" in text or "cloth" in text or "holding" in text
+        ), f"text: {text}, should contain iron, hang, cloth or holding"
         assert response.id
         assert response.created
         assert response.usage.prompt_tokens > 0
@@ -132,7 +142,9 @@ class TestOpenAIVisionServer(CustomTestCase):
         assert response.choices[0].message.role == "assistant"
         text = response.choices[0].message.content
         assert isinstance(text, str)
-        assert "man" in text or "cab" in text, text
+        assert (
+            "man" in text or "cab" in text
+        ), f"text: {text}, should contain man or cab"
         assert response.id
         assert response.created
         assert response.usage.prompt_tokens > 0
@@ -175,8 +187,12 @@ class TestOpenAIVisionServer(CustomTestCase):
         print("-" * 30)
         print(f"Multi images response:\n{text}")
         print("-" * 30)
-        assert "man" in text or "cab" in text or "SUV" in text or "taxi" in text, text
-        assert "logo" in text or '"S"' in text or "SG" in text, text
+        assert (
+            "man" in text or "cab" in text or "SUV" in text or "taxi" in text
+        ), f"text: {text}, should contain man, cab, SUV or taxi"
+        assert (
+            "logo" in text or '"S"' in text or "SG" in text
+        ), f"text: {text}, should contain logo, S or SG"
         assert response.id
         assert response.created
         assert response.usage.prompt_tokens > 0
@@ -305,9 +321,9 @@ class TestOpenAIVisionServer(CustomTestCase):
         client = openai.Client(api_key=self.api_key, base_url=self.base_url)
 
         regex = (
-            r"""\{\n"""
-            + r"""   "color": "[\w]+",\n"""
-            + r"""   "number_of_cars": [\d]+\n"""
+            r"""\{"""
+            + r""""color":"[\w]+","""
+            + r""""number_of_cars":[\d]+"""
             + r"""\}"""
         )
 
@@ -732,5 +748,33 @@ class TestGemma3itServer(TestOpenAIVisionServer):
         pass
 
 
+class TestKimiVLServer(TestOpenAIVisionServer):
+    @classmethod
+    def setUpClass(cls):
+        cls.model = "moonshotai/Kimi-VL-A3B-Instruct"
+        cls.base_url = DEFAULT_URL_FOR_TEST
+        cls.api_key = "sk-123456"
+        cls.process = popen_launch_server(
+            cls.model,
+            cls.base_url,
+            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
+            other_args=[
+                "--trust-remote-code",
+                "--chat-template",
+                "kimi-vl",
+                "--context-length",
+                "4096",
+                "--tensor-parallel-size",
+                "2",
+                "--dtype",
+                "bfloat16",
+            ],
+        )
+        cls.base_url += "/v1"
+
+    def test_video_chat_completion(self):
+        pass
+
+
 if __name__ == "__main__":
     unittest.main()