GPT-Realtime-2.1-mini is now available in the API
OpenAI has released GPT-Realtime-2.1-mini to its API, adding reasoning and tool use to its lower-cost voice model line.
Decoder
- p95 latency: A performance metric representing the response time experienced by 95% of users; if p95 is 200ms, 95% of requests are faster than that.
Original article
GPT-Realtime-2.1-mini is now available in the API, bringing reasoning and tool use to our Realtime mini lineup at the same cost as GPT-Realtime-mini. We’ve reduced p95 latency by at least 25% across Realtime voice models through improved caching.
We’re having way too much fun working through your feedback. (Please, keep it coming.) Keyboard shortcuts are now customizable. Set Codex up around how you actually work, then tweak shortcuts from settings instead of adapting to our defaults. Git actions are easier to reach. We moved key git controls back into the review flow, so common actions like commit, push, branch, PR creation, and PR status are closer to where you’re already working. Improved thread panel. Related context and controls now load and behave more cleanly from the thread header: summaries, local state, Git context, sources, and more.
Today we’re announcing Open Responses: an open-source spec for building multi-provider, interoperable LLM interfaces built on top of the original OpenAI Responses API.
- Multi-provider by default
- Useful for real-world workflows
- Extensible without fragmentation
Build agentic systems without rewriting your stack for every model: openresponses.org
GPT-5.2-Codex is now available in the Responses API—the same model available in Codex. It’s strong at complex long-running tasks like building new features, refactoring code, and finding bugs. Plus, it’s the most cyber-capable model yet, helping to find and understand codebase vulnerabilities.
Codex now officially supports skills. Skills are reusable bundles of instructions, scripts, and resources that help Codex complete specific tasks. You can call a skill directly with $.skill-name, or let Codex choose the right one based on your prompt. Following the agentskills.io standard, a skill is just a folder: SKILL.md for instructions + metadata, with optional scripts, references, and assets. We’re looking forward to collaborating on the standard so it’s easy to share and use skill across different tools.
You can now get more Codex usage from your plan and credits with three updates today:
- GPT-5-Codex-Mini — a more compact and cost-efficient version of GPT-5-Codex
- 50% higher rate limits for ChatGPT Plus, Business, and Edu
- Priority processing for ChatGPT Pro and Enterprise
GPT-5-Codex-Mini allows roughly 4x more usage than GPT-5-Codex, at a slight capability tradeoff due to the more compact model. Available in the CLI and IDE extension when you sign in with ChatGPT, with API support coming soon.
Two big updates to the Responses API today. Connectors — Pull context from Gmail, Google Calendar, Dropbox, and more in a single API call. Conversations — Persist chat threads for your users, without running your own database.
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