{"id":"claude-opus-4-1-20250805-thinking","slug":"claude-opus-4-1-20250805-thinking","name":"Claude Opus 4.1 20250805 Thinking","orgId":"anthropic","family":"claude-opus-4-1-20250805-thinking","releaseDate":null,"availability":"unreleased","openWeights":false,"license":"Proprietary","paramsTotal":null,"contextWindow":null,"knowledgeCutoff":null,"modelCardUrl":"https://huggingface.co/datasets/lmarena-ai/leaderboard-dataset","hfRepo":null,"modalities":["text"],"aliases":["claude-opus-4-1-20250805-thinking-16k","Claude Opus 4.1 20250805 Thinking"],"aliasNote":null,"organization":{"id":"anthropic","name":"Anthropic","slug":"anthropic","country":null,"url":null,"color":"#D97757","mark":"A"},"price":null,"answer":{"word":"Not yet.","scope":"Not released, so it cannot be state of the art.","lead":"As of Oct 14, 2026, Claude Opus 4.1 20250805 Thinking from Anthropic. Not released, so it cannot be state of the art. Announced but not publicly usable, so it cannot hold General LLM.","confidence":"low"},"verdicts":[{"id":"v_overall_general-llm_claude-opus-4-1-20250805-thinking_2026-10-14_open_UNRELEASED","model":"claude-opus-4-1-20250805-thinking","model_name":"Claude Opus 4.1 20250805 Thinking","category":"general-llm","category_name":"General LLM","slice":"overall","state":"UNRELEASED","rank":null,"margin":null,"confidence":"low","valid_from":"2026-10-14","valid_to":null,"configuration":null,"rationale":"Announced but not publicly usable, so it cannot hold General LLM.","safeguard_flags":["no_primary_evidence"],"co_sota_with":[],"challengers":[],"methodology":"1.0","label":"Unreleased"}]}