Added Ultrafast mode for GPT-6.1 Sol in the Responses API
UpdateyesterdayUnverifiedAdded Oct 9, 2026
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.
Topics: LLMs, Pricing, Developer tools
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Fixed a bug in image encoding that degraded image understanding in GPT-6 Sol and GPT-6 Luna
Fixed a bug in image encoding that degraded image understanding in GPT-6 Sol and GPT-6 Luna. This update improves results on visual tasks in the API and Codex, including computer use. If your use cases involve image inputs, we recommend rerunning your evaluations and retrying workflows affected by the issue.
Also shipped on Oct 8, 2026
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