15:04
2026-07-06
sourcefeed.dev
large-language-models
The 516-Token Cliff: Inside GPT-5.5's Silent Reasoning Regression
Telemetry from OpenAI's Codex repository reveals that GPT-5.5 responses are disproportionately terminating at exact reasoning-token boundaries (516, 1034, 1552), with the clustering ratio at 516 token…