Checked fact 42718 Nov 2026Research

METR defines the 50% time horizon as the duration at which an agent is predicted to succeed half the time.

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The exact words it rests on

For example, the 50%-time horizon is the duration at which an agent is predicted to succeed half the time.

What the source said when we opened it, on 8 Nov 2026.

The source

Task-completion time horizons of frontier AI models
METR

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Checked by the notis newsroom on 8 Nov 2026, against the source above.

In the story

How METR's time horizon rates AI agents by human task length 8 Nov 2026

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“METR defines the 50% time horizon as the duration at which an agent is predicted to succeed half the time.” ai notis, checked 8 Nov 2026. Source: Task-completion time horizons of frontier AI models (METR). https://ainotis.com/c/4271

As a reference (APA style)

ai notis. (2026, November 8). METR defines the 50% time horizon as the duration at which an agent is predicted to succeed half the time [Checked claim 4271]. ai notis. https://ainotis.com/c/4271

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