Long-context models still waste tokens by copying the prompt into reasoning
eyishazyer · x · 2026-07-23
A post about a paper argues that long-context reasoning still has a hidden failure mode: even strong models copy large chunks of the prompt into their own chain-of-thought, wasting tokens and hurting accuracy.
- The assumption that long context solved retrieval is challenged.
- Copying gets worse as inputs get longer.
- The result quietly eats token budget and degrades performance.
- The proposed fix is not just more context, but smarter context handling.
Related event: Study Reveals Long-Context Models Waste Tokens Copying Text(2 posts)→
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