Checked fact 115411 Oct 2026Models and releases

OpenAI API changelog, 8 October 2026: Ultrafast mode added for GPT-6.1 Sol in the Responses API.

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The exact words it rests on

Added [Ultrafast mode](https://developers.openai.com/api/docs/guides/ultrafast-mode) for [GPT-6.1 Sol](https://developers.openai.com/api/docs/models/gpt-6.1-sol) in the Responses API.

What the source said when we opened it, on 11 Oct 2026.

The source

OpenAI API changelog
OpenAI · 2026-10-08

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Checked by the notis newsroom on 11 Oct 2026, against the source above.

In the story

OpenAI added Ultrafast mode for GPT-6.1 Sol, priced at $12 per million input tokens. 11 Oct 2026

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“OpenAI API changelog, 8 October 2026: Ultrafast mode added for GPT-6.1 Sol in the Responses API.” ai notis, checked 11 Oct 2026. Source: OpenAI API changelog (OpenAI). https://ainotis.com/c/1154

As a reference (APA style)

ai notis. (2026, October 11). OpenAI API changelog, 8 October 2026: Ultrafast mode added for GPT-6.1 Sol in the Responses API [Checked claim 1154]. ai notis. https://ainotis.com/c/1154

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