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OpenAI releases GPT-6.1 Terra model

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OpenAI has released GPT-6.1 Terra, a model optimized for visual reasoning, computer use, and natural writing.

LLMs

Read on developers.openai.com

Also shipped Oct 26, 2026OpenAI in October 2026 →

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You can now choose 12-hour prompt caching in the API

You can now choose 12-hour prompt caching in the API. 12-hour prompt caching keeps shared instructions, tools, and context cached longer to benefit from lower cached-input pricing, even when requests are hours apart. 12-hour cache writes cost 2.5x the input token price. Read more here.

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Released prompt-to-voice for all API customers

Released prompt-to-voice for all API customers. Create a custom voice from a text description through the API or voice Playground, then reuse it in GPT-Live sessions. Creating a prompt-generated voice is free; speech generation uses regular GPT-Live session billing.

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Added native Decisions integration in GPT-Live

Added native Decisions integration in GPT-Live. Your app can act while your user is speaking or react to what Live says. Let Live call Decisions directly through native delegation, or trigger decisions as input or output transcript deltas arrive.

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Added Ultrafast mode for GPT-6.1 Sol in the Responses API

Added Ultrafast mode for GPT-6.1 Sol in the Responses API. Use gpt-6.1-sol with service_tier: "ultrafast" to reduce the time between generated output tokens. It is available to all API users, subject to rate limits, with global processing and US and EU data residency. See Ultrafast pricing.

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