---
id: pr-flash-attention-2025
repo: Dao-AILab/flash-attention
pr: 2025
title: Bump pin
author: drisspg
date: '2025-11-25'
url: https://github.com/Dao-AILab/flash-attention/pull/2025
source_category: upstream-code
architectures:
- sm100
tags:
- blackwell
- cutlass
techniques: []
hardware_features:
- blackwell
kernel_types:
- attention
languages:
- cute-dsl
captured_at: '2026-05-16'
status: merged
merge_sha: 672381f72c927a4b4a92f30755dc5829c3d0eaa3
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- benchmarks/benchmark_attn.py
- flash_attn/cute/fast_math.py
- flash_attn/cute/flash_bwd_sm100.py
- flash_attn/cute/flash_fwd.py
- flash_attn/cute/flash_fwd_combine.py
- flash_attn/cute/flash_fwd_sm100.py
- flash_attn/cute/mask.py
- flash_attn/cute/paged_kv.py
- flash_attn/cute/pyproject.toml
- flash_attn/cute/softmax.py
- flash_attn/cute/tile_scheduler.py
- tests/cute/test_flash_attn_varlen.py
artifact_dir: evidence/pull-bundles/flash-attention/gh-2025
head_ref_oid: e924a7eeb72bb416d9fb34141885f81f5d0b7bdd
---
# Bump pin

- Repository: `Dao-AILab/flash-attention`
- PR: [2025](https://github.com/Dao-AILab/flash-attention/pull/2025)
- Decision: `Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.`
- Reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.

## Changed Paths

- `benchmarks/benchmark_attn.py`
- `flash_attn/cute/fast_math.py`
- `flash_attn/cute/flash_bwd_sm100.py`
- `flash_attn/cute/flash_fwd.py`
- `flash_attn/cute/flash_fwd_combine.py`
- `flash_attn/cute/flash_fwd_sm100.py`
- `flash_attn/cute/mask.py`
- `flash_attn/cute/paged_kv.py`
- `flash_attn/cute/pyproject.toml`
- `flash_attn/cute/softmax.py`
- `flash_attn/cute/tile_scheduler.py`
- `tests/cute/test_flash_attn_varlen.py`

## Evidence Bundle

`evidence/pull-bundles/flash-attention/gh-2025`
