{"id":"claude-sonnet-4-5-20250929","slug":"claude-sonnet-4-5-20250929","name":"Claude Sonnet 4.5 20250929","orgId":"anthropic","family":"claude-sonnet-4-5-20250929","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_16K","Claude Sonnet 4.5 20250929","claude-sonnet-4-5-20250929_59K","claude-sonnet-4-5-20250929_32K"],"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 #47 in Abstraction (ARC).","lead":"As of Oct 14, 2026, Claude Sonnet 4.5 20250929 from Anthropic. Best recorded rank is #47 in Abstraction (ARC). Last listed at #47 in Abstraction (ARC) on 2025-09-29. That board does not award a crown.","confidence":"low"},"verdicts":[{"id":"v_overall_reasoning_claude-sonnet-4-5-20250929_2026-10-14_open_NOT_SOTA","model":"claude-sonnet-4-5-20250929","model_name":"Claude Sonnet 4.5 20250929","category":"reasoning","category_name":"Reasoning","slice":"overall","state":"NOT_SOTA","rank":81,"margin":null,"confidence":"low","valid_from":"2026-10-14","valid_to":null,"configuration":null,"rationale":"Last listed at #81 in Reasoning on 2025-09-29.","safeguard_flags":["off_board"],"co_sota_with":[],"challengers":[],"methodology":"1.0","label":"Not SOTA · #81"},{"id":"v_overall_science_claude-sonnet-4-5-20250929_2026-10-14_open_NOT_SOTA","model":"claude-sonnet-4-5-20250929","model_name":"Claude Sonnet 4.5 20250929","category":"science","category_name":"Science","slice":"overall","state":"NOT_SOTA","rank":81,"margin":null,"confidence":"low","valid_from":"2026-10-14","valid_to":null,"configuration":null,"rationale":"Last listed at #81 in Science on 2025-09-29. That board does not award a crown.","safeguard_flags":["off_board"],"co_sota_with":[],"challengers":[],"methodology":"1.0","label":"Not SOTA · #81"},{"id":"v_overall_factuality_claude-sonnet-4-5-20250929_2026-10-14_open_NOT_SOTA","model":"claude-sonnet-4-5-20250929","model_name":"Claude Sonnet 4.5 20250929","category":"factuality","category_name":"Factuality","slice":"overall","state":"NOT_SOTA","rank":61,"margin":null,"confidence":"low","valid_from":"2026-10-14","valid_to":null,"configuration":null,"rationale":"Last listed at #61 in Factuality on 2025-09-29.","safeguard_flags":["off_board"],"co_sota_with":[],"challengers":[],"methodology":"1.0","label":"Not SOTA · #61"},{"id":"v_overall_arc_claude-sonnet-4-5-20250929_2026-10-14_open_NOT_SOTA","model":"claude-sonnet-4-5-20250929","model_name":"Claude Sonnet 4.5 20250929","category":"arc","category_name":"Abstraction (ARC)","slice":"overall","state":"NOT_SOTA","rank":47,"margin":null,"confidence":"low","valid_from":"2026-10-14","valid_to":null,"configuration":null,"rationale":"Last listed at #47 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":"Not SOTA · #47"}]}