Anthropic’s latest internal AI model, referred to as Model 4 by METR, scored above 50% on every benchmark it was tested on. It is the first model in METR’s dataset to clear the 50% threshold across all evaluations. Completed its training last month, the model quickly became the highest-scoring model in METR’s analysis. This progress comes amid a competitive race involving Anthropic, Google, Meta and OpenAI, after Anthropic announced the Claude Opus 5.5, Sonnet 5.5 and Haiku 5.5 models on the same day without publicly linking Model 4 to any commercial product. Market participants are now watching for any announcement of a public release for Model 4 and for the results of upcoming independent evaluations.
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