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METR reveals Anthropic's unreleased Model 4, trained in September–October 2026, scored 178.6 on the AI capability index, a jump nearly 90% as large as the entire improvement from Opus 4.6 to Mythos 5.

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  1. 2026-11-05 19:12 · r/singularity
    METR reveals Anthropic's unreleased Model 4, trained in September–October 2026, scored 178.6 on the AI capability index, a jump nearly 90% as large as the entire improvement from Opus 4.6 to Mythos 5.

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