Differential Transformer subtracts two attention maps to cancel noise for long-context reasoning

evolvingstuff · x · 2026-09-25

A retweet introducing the Differential Transformer idea: attention is inherently noisy, and the method subtracts two attention maps from each other to cancel noise and focus purely on the signal.

The authors claim this yields a significant improvement in long-context reasoning while reducing hallucinations. It's an architecture-level innovation using a differential structure to suppress attention redundancy; paper link in the original post.

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