OpenAI launches GPT-5.5 with 82.7% Terminal-Bench 2.0 accuracy

OpenAI released GPT-5.5 and said it reached 82.7% accuracy on Terminal-Bench 2.0 while keeping the same latency as GPT-5.4. OpenAI rolled the model out to ChatGPT Plus, Pro, and enterprise users, with API access expected soon.

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