Bump torch to 2.7.0 (#6788)

docker/Dockerfile.blackwell

@@ -4,7 +4,7 @@ ENV DEBIAN_FRONTEND=noninteractive
 
 WORKDIR /sgl-workspace
 
-RUN pip3 install --pre torch torchvision torchaudio --index-url https://download.pytorch.org/whl/nightly/cu128
+RUN pip3 install torch==2.7.0 torchvision==0.22.0 torchaudio==2.7.0 --index-url https://download.pytorch.org/whl/cu128
 
 RUN pip3 install https://github.com/sgl-project/whl/releases/download/v0.1.4/sgl_kernel-0.1.4+cu128-cp39-abi3-manylinux2014_x86_64.whl \
     && pip3 install setuptools==75.0.0 wheel==0.41.0 scikit-build-core

python/pyproject.toml

@@ -61,8 +61,8 @@ srt = [
 blackwell = [
     "sglang[runtime_common]",
     "sgl-kernel",
-    "torch",
-    "torchvision",
+    "torch==2.7.0",
+    "torchvision==0.22.0",
     "cuda-python",
     "outlines>=0.0.44,<=0.1.11",
     "einops",

sgl-kernel/build.sh

@@ -26,7 +26,7 @@ fi
 
 if [ ${CUDA_VERSION} = "12.8" ]; then
    DOCKER_IMAGE="${BUILDER_NAME}:cuda${CUDA_VERSION}"
-   TORCH_INSTALL="pip install --no-cache-dir --pre torch --index-url https://download.pytorch.org/whl/nightly/cu${CUDA_VERSION//.}"
+   TORCH_INSTALL="pip install --no-cache-dir torch==2.7.0 --index-url https://download.pytorch.org/whl/cu${CUDA_VERSION//.}"
 else
    DOCKER_IMAGE="${BUILDER_NAME}:cuda${CUDA_VERSION}"
    TORCH_INSTALL="pip install --no-cache-dir torch==2.6.0 --index-url https://download.pytorch.org/whl/cu${CUDA_VERSION//.}"