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I Read Codex's Source to Find When It Auto-Compacts. It's 90%, and You Can't Turn It Off

Originally published at its-tahir.com . Codex users keep asking when auto compaction fires and why raising the limit doesn't delay it. So I read the 0.166.0 source: auto compaction starts at 90% of the context window (244,800 tokens on a 272K model), model_auto_compact_token_limit can only move it…

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  1. 2026-11-10 03:55 · DEV Community — AI
    I Read Codex's Source to Find When It Auto-Compacts. It's 90%, and You Can't Turn It Off

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