huggingface config_error ai_generated true

ImportError: Flash Attention 2 not compatible with this model

ID: huggingface/flash-attention-incompatible

Also available as: JSON · Markdown
80%Fix Rate
84%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
4 active — — —

Root Cause

Flash Attention 2 not supported for this model architecture.

generic

Workarounds

  1. 88% success Check model card for supported attn_implementation values
  2. 90% success Fall back to sdpa: attn_implementation="sdpa" (PyTorch native)

Dead Ends

Common approaches that don't work:

  1. Force flash attention on unsupported model 85% fail

    Crashes or wrong output

  2. Implement custom attention 78% fail

    Maintenance burden