Unverified50% confidenceFactExact time
The context window is a hard constraint of Claude Code; the fuller the window, the more easily the model loses key information, a phenomenon known as context rot.
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50%
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Long-term
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11/4/2026
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UnverifiedDespite large context windows, Context Rot remains a major problem, as the model's attention distribution over information at different positions in the context is uneven (the Lost in the Middle effect).77% similarUnverifiedAnthropic engineers call the phenomenon where the more tokens in the context window, the worse the model's recall, 'context rot'.75% similarUnverifiedA model's context window has a physical upper limit and cannot ingest all information from an entire large codebase at once, which may result in code changes that are locally optimal but globally incorrect.75% similarUnverifiedThe context windows of large models are limited, ultra-long texts need to be processed in segments, and implicit contradictions across segments may still be missed.73% similarUnverifiedAs task chains grow longer, a full context window causes early critical information to be squeezed out, producing state drift issues.72% similar
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