Anthropic Spotted Using Claude Fable for Custom CUDA Kernels in GitHub PR

peterjliu · x · 2026-07-29

A developer noticed that Anthropic's recent GitHub PR for optimized CUDA kernels—designed for their new Attention Residuals mechanism—included traces of Claude Fable usage, likely left unscrubbed by an employee.

The original poster praised Attention Residuals as a brilliant innovation combining Transformer depth-wise residuals with RNN-like state access, noting that making it work efficiently at frontier scale is highly impressive.

Related event: Anthropic Reportedly Uses Claude for CUDA Coding(2 posts)→

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