Checked fact 293227 Oct 2026Models and releases

OpenAI says it measured GPT-6.1 Terra on Agents' Last Exam, MMMU-Pro, OSWorld 2.1, Terminal-Bench 4.0 and Terminal-Bench-Science 0.1, and that the post's error-rate figures come from its internal benchmark.

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The exact words it rests on

We measured GPT-6.1 Terra’s computer-use capabilities on Agents’ Last Exam

What the source said when we opened it, on 27 Oct 2026.

The source

Introducing GPT-6.1 Terra
OpenAI · 2026-10-26

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Checked by the notis newsroom on 27 Oct 2026, against the source above.

In the story

OpenAI says GPT-6.1 Terra meets Critical cybersecurity threshold, at half GPT-5.6 Terra's price 27 Oct 2026

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“OpenAI says it measured GPT-6.1 Terra on Agents' Last Exam, MMMU-Pro, OSWorld 2.1, Terminal-Bench 4.0 and Terminal-Bench-Science 0.1, and that the post's error-rate figures come from its internal benchmark.” ai notis, checked 27 Oct 2026. Source: Introducing GPT-6.1 Terra (OpenAI). https://ainotis.com/c/2932

As a reference (APA style)

ai notis. (2026, October 27). OpenAI says it measured GPT-6.1 Terra on Agents' Last Exam, MMMU-Pro, OSWorld 2.1, Terminal-Bench 4.0 and Terminal-Bench-Science 0.1, and that the post's error-rate figures come from its internal benchmark [Checked claim 2932]. ai notis. https://ainotis.com/c/2932

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