{"id":"seed-2-1-pro-preview","slug":"seed-2-1-pro-preview","name":"Seed 2.1 Pro Preview","orgId":"bytedance","family":"seed-2-1-pro-preview","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":["seed-2.1-pro-preview","Seed 2.1 Pro Preview"],"aliasNote":null,"organization":{"id":"bytedance","name":"ByteDance","slug":"bytedance","country":null,"url":null,"color":"#E2336B","mark":"B"},"price":null,"answer":{"word":"Not yet.","scope":"Not released, so it cannot be state of the art.","lead":"As of Oct 14, 2026, Seed 2.1 Pro Preview from ByteDance. 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_seed-2-1-pro-preview_2026-10-14_open_UNRELEASED","model":"seed-2-1-pro-preview","model_name":"Seed 2.1 Pro Preview","category":"general-llm","category_name":"General LLM","slice":"overall","state":"UNRELEASED","rank":null,"present_evidence":[],"missing_evidence":[],"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"}]}