OpenAI Developers
@OpenAIDevs
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Updates for developers building with the OpenAI Platform and API • Service status: https://t.co/kZwnwdYqOS • Support: https://t.co/qCi6M5ESZU
Joined March 2023
GPT-5.1 is now available in the API. It’s faster, more steerable, better at coding, and ships with practical new tools. If you’re building apps or agents where intelligence, speed, and cost matter, GPT-5.1 should feel like a meaningful upgrade.
openai.com
GPT-5.1 is now available in the API, bringing faster adaptive reasoning, extended prompt caching, improved coding performance, and new apply_patch and shell tools.
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🚀 Final tip: Treat the prompt as a living document. Test, iterate, refine. Small changes in phrasing or structure often lead to big gains. Check out our Prompt Optimizer tool to apply these best practices to GPT-5.1:
platform.openai.com
Explore developer resources, tutorials, API docs, and dynamic examples to get the most out of OpenAI's platform.
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🔧 For complex, long-running tasks: - Use a plan tool: break work into milestones with statuses (pending/in-progress/done). - Encourage persistence: “carry it through implementation, verification, explanation” rather than stopping early. - If no reasoning is needed, choose
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🎯 Prompting tips for max performance: - Describe the agent persona (tone, style, objective) clearly - Define output format (# of sentences, bullet rules, sections) - Tell it when to call tools vs when to rely on internal knowledge
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Get the most out of GPT-5.1, based on internal testing and early testing with customers ⬇️ https://t.co/NlGmLsJXgP
cookbook.openai.com
GPT-5.1, our newest flagship model, is designed to balance intelligence and speed for a variety of agentic and coding tasks, while also i...
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GPT-5.1 isn’t “GPT-5 but faster.” In our evals of the model, we found it’s the highest-precision model we’ve ever tested for code-related tasks like code review. Less noise, more fixes, reviews that read like patches again.
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Apps are now available for ChatGPT business plans. If you’re using ChatGPT Business or Enterprise, you can now test and deploy apps for your workspace using developer mode. Learn more:
developers.openai.com
Learn how to use Apps SDK by OpenAI. Our framework to build apps for ChatGPT.
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Excited to get @OpenAI's GPT-5.1 Instant live for our customers and their agents. Nice early results: a 20% improvement in low-latency tool-calling performance compared to GPT-5 (minimal).
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@OpenAI's GPT-5.1 delivers a solid upgrade from GPT-5 for agentic coding. We've noticed that the model is more steerable, overthinks less, and is better at frontend design. The model is also faster on most tasks because it dynamically adjusts reasoning depth based on the
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We received early access to GPT-5.1 for testing Pace agents are now 50% faster while matching or even exceeding accuracy across our evals!
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.@OpenAI's GPT-5.1 is live in Cline. After testing the last several weeks, here's what we've found makes GPT-5.1 an exceptional model in Cline: GPT-5.1 is an obsessive researcher. It reads everything before writing anything. Where other models grab context and go, GPT-5.1
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We've been testing Box AI with GPT-5.1 for the past week to compare it to GPT-5 for enterprise content use-cases. It's a very strong upgrade from GPT-5. It's super fast, performing ~2X (or more) faster on our tests on long documents (30,000+ tokens); and we saw an 8 percentage
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GPT-5.1 is now live in Augment Code. It's our strongest model yet for complex reasoning tasks, such as identifying and fixing bugs or complex multi-file edits. Rolling out to users now. We’re excited for you to try it!
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GPT-5.1 is now live in Warp. It’s much faster (40% faster task completion on a subset of SWE-bench Verified) without compromising quality. GPT-5.1 is available to all Warp users, and is now the default model for all new users.
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@OpenAIDevs is cooking again: GPT-5.1 performed very well in our first tests! Photo of an espresso machine → "make it a stylized 2.5D version" → done faster than you can pull a good shot of espresso. Handles ambiguous prompts fast and effectively and the responses also feel
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We got feedback on GPT‑5.1 from a handful of companies and developers. Here are their early impressions:
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Ask us your questions on 5.1 in the API 👇
Reddit AMA on GPT-5.1 and our customization updates. Tomorrow, 2PM PT. https://t.co/9WfAa5GVXw
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And lastly, we’re shipping two new tools: • apply_patch for reliable, freeform code edits • shell tool to execute commands in controlled loops
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We also shipped gpt-5.1-codex and gpt-5.1-codex-mini. Here’s how to think about these models: • gpt-5.1 for everyday coding tasks • gpt-5.1-codex for complex, long-running agentic coding • gpt-5.1-codex-mini for cost-efficient edits and changes
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