GPT-5.5 Codex performance degradation linked to reasoning-token clustering

Discourse · Hacker News · stat: —

Developers on Hacker News are discussing potential performance degradation in GPT-5.5 Codex. The leading theory points to 'reasoning-token clustering,' where the model's internal logic representations become less distinct, impacting its coding and problem-solving abilities. The debate centers on whether this is a fundamental architectural flaw.

The bleeding edge of AI reveals increasingly esoteric bugs. Founders building on new models must budget for unexpected performance regressions.

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