Anthropic’s internal Model 4 scored 178.6 on METR’s AECI, up roughly 4.5 points from…
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Anthropic’s internal Model 4 scored 178.6 on METR’s AECI, up roughly 4.5 points from Model 2 at around 174 on the same chart. Model 2 finished training in July and Model 4 finished in September October. METR estimates benchmark progress is running roughly 1.9x faster than its previous rate, we’re starting to see the RSI feedback loop! Anthropic staff using Model 4 estimated roughly 12x their output without AI, compared with around 4x in an earlier poll using Mythos Preview!
Posted by Chris (72.4k followers) 18 h ago · 49 likes · 3.7k views · view the original post on X. Kept by the AI Radar as Frontier models.
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