AI · 2h ago
OpenAI Codex Bug: Token Clustering Hurts GPT-5.5 Reasoning
A GitHub issue reports that GPT-5.5 Codex's reasoning-token clustering may degrade performance. The bug clusters related tokens, potentially reducing output diversity and accuracy. OpenAI has not yet commented on the fix timeline.
Meridian48 take
This highlights the fragility of large language models, where even internal optimizations can backfire.
Read the full reporting
GPT-5.5 Codex reasoning-token clustering may be leading to degraded performance →
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