OpenAI P50 time horizon hits 4.7 hours as of July 2026, beyond usual METR methodology
scaling01 · x · 2026-09-06
scaling01 cites data showing OpenAI's P50 time horizon — the median task length a model can reliably complete — reached 4.7 hours as of July 2026, noting this is no longer measured under the usual METR methodology, implying a shift in definition or measurement approach. Time horizon is a core metric for tracking AI capability growth, and P50 crossing multi-hour scale is a notable capability signal.
Related event: OpenAI models now handle 4.7-hour tasks at P50(4 posts)→
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