OpenAI Just Dropped GPT-5.5. The Agentic Coding War Just Ended.
OpenAI just shipped GPT-5.5 with 82.7% on Terminal-Bench 2.0 — a 17-point jump over GPT-5 and a clear lead over Claude Opus 4.6. A new Pro tier lands in ChatGPT and Codex, agent loops cap at 200 steps, and the pricing math forces every coding-tool vendor to react this week.