GPT-5.1 API Released: Same Price, Powerful New Tools
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GPT-5.1 is now available in the API. Pricing is the same as GPT-5. We are also releasing gpt-5.1-codex and gpt-5.1-codex-mini in the API, specialized for long-running coding tasks. Prompt caching now lasts up to 24 hours! Updated evals in our blog post.
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gpt-5 apilanguage model apicode generationprompt cachingai model pricingapi documentationdeveloper tools