{"id":"claude-sonnet-4-6","slug":"claude-sonnet-4-6","name":"Claude Sonnet 4.6","orgId":"anthropic","family":"claude-sonnet-4-6","releaseDate":"2026-02-17","availability":"ga","openWeights":false,"license":"Proprietary","paramsTotal":null,"contextWindow":1000000,"knowledgeCutoff":null,"modelCardUrl":"https://huggingface.co/datasets/lmarena-ai/leaderboard-dataset","hfRepo":null,"modalities":["text","image","file"],"aliases":["claude-sonnet-4-6","Claude Sonnet 4.6","claude-sonnet-4-6_max","claude-sonnet-4-6_high","claude-sonnet-4-6_medium","claude-sonnet-4-6_32K","claude-sonnet-4-6_16K","claude-sonnet-4-6_unknown","anthropic/claude-sonnet-4.6","Anthropic: Claude Sonnet 4.6"],"aliasNote":null,"organization":{"id":"anthropic","name":"Anthropic","slug":"anthropic","country":null,"url":null,"color":"#D97757","mark":"A"},"price":{"modelId":"claude-sonnet-4-6","provider":"anthropic","inputPerM":null,"outputPerM":null,"blendedPerM":6,"tokensPerS":null,"observedAt":"2026-10-13","sourceId":"openrouter"},"answer":{"word":"It used to be.","scope":"Was SOTA in Long context.","lead":"As of Oct 14, 2026, Claude Sonnet 4.6 from Anthropic. 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