Introducing GPT-5.1 for developers
OpenAI ships a meaningful mid-cycle update to its flagship model with production-ready features (extended prompt caching, new tools) that directly reduce developer friction and inference costs. This signals aggressive iteration velocity and suggests the model wars are moving from capability benchmarks to developer experience.
Why it ranks · · GPT-5.1 now available in API · Nov 10 – 16, 2025
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