Patch release v5.6.1
Flash attention path was broken! Sorry everyone for this one 🤗
- Fix AttributeError on s_aux=None in flash_attention_forward (#45589) by @jamesbraza
Patch release v5.6.1
Transformers（HuggingFace）Releases / 4/23/2026
📰 NewsDeveloper Stack & InfrastructureModels & Research
Key Points
- The project has issued a patch release version v5.6.1 after a broken “flash attention” path.
- The release includes a specific fix for an AttributeError occurring when s_aux is None in flash_attention_forward.
- The fix was contributed via PR #45589 (by jamesbraza), addressing the reported runtime failure.
- The maintainers acknowledged the issue and apologized to users for the disruption caused by this regression.
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