GPT-5.5 Codex reasoning-token clustering at 516/1034/1552 may be leading to degraded performance on complex tasks #30364
Summary
The article discusses a GitHub issue about GPT-5.5 Codex showing fixed-token clustering, with reasoning tokens clustering at 516 and spikes at 1034 and 1552. It presents data suggesting potential reasoning-budget or threshold behavior and calls for investigation by the Codex team, making it a notable AI development/read for developers concerned with model behavior and reliability.