STORY · PRODUKTER_
GPT-5.5 Codex: reasoning-token clustering may lead to degraded performance
A user reports that GPT-5.5 Codex shows signs of reduced performance, possibly caused by how reasoning-tokens are grouped. The issue is being discussed in OpenAI's GitHub issue tracker with technical analysis of the behavior.
WHY IT MATTERS
If reasoning-token clustering actually affects the model's ability to generate code, it could impact developer productivity and point to a design problem in large reasoning models that requires attention.
SOURCES
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