{"id":"claude-sonnet-4-5-20250929-1k","slug":"claude-sonnet-4-5-20250929-1k","name":"Claude Sonnet 4.5 20250929 1K","orgId":"anthropic","family":"claude-sonnet-4-5-20250929-1k","releaseDate":"2025-09-29","availability":"ga","openWeights":false,"license":null,"paramsTotal":null,"contextWindow":null,"knowledgeCutoff":null,"modelCardUrl":"https://epoch.ai/benchmarks","hfRepo":null,"modalities":["text"],"aliases":["claude-sonnet-4-5-20250929_1K","Claude Sonnet 4.5 20250929 1K"],"aliasNote":null,"organization":{"id":"anthropic","name":"Anthropic","slug":"anthropic","country":null,"url":null,"color":"#D97757","mark":"A"},"price":null,"answer":{"word":"No.","scope":"Best recorded rank is #56 in Abstraction (ARC).","lead":"As of Oct 14, 2026, Claude Sonnet 4.5 20250929 1K from Anthropic. Best recorded rank is #56 in Abstraction (ARC). Last listed at #56 in Abstraction (ARC) on 2025-09-29. That board does not award a crown.","confidence":"low"},"verdicts":[{"id":"v_overall_arc_claude-sonnet-4-5-20250929-1k_2026-10-14_open_RANKED","model":"claude-sonnet-4-5-20250929-1k","model_name":"Claude Sonnet 4.5 20250929 1K","category":"arc","category_name":"Abstraction (ARC)","slice":"overall","state":"RANKED","rank":56,"present_evidence":[],"missing_evidence":[],"margin":null,"confidence":"low","valid_from":"2026-10-14","valid_to":null,"configuration":null,"rationale":"Last listed at #56 in Abstraction (ARC) on 2025-09-29. That board does not award a crown.","safeguard_flags":["off_board"],"co_sota_with":[],"challengers":[],"methodology":"1.0","label":"#56 in Abstraction (ARC)"}]}