{"id":"muse-spark-1-2","slug":"muse-spark-1-2","name":"Muse Spark 1.2","orgId":"meta","family":"muse-spark-1-2","releaseDate":"2026-08-05","availability":"ga","openWeights":false,"license":"Proprietary","paramsTotal":null,"contextWindow":1048576,"knowledgeCutoff":null,"modelCardUrl":"https://huggingface.co/datasets/lmarena-ai/leaderboard-dataset","hfRepo":null,"modalities":["text","image","video","file"],"aliases":["muse-spark-1.2 (xHigh)","Muse Spark 1.2","muse-spark-1.2_xhigh","muse-spark-1.2","meta/muse-spark-1.2","Meta: Muse Spark 1.2"],"aliasNote":null,"organization":{"id":"meta","name":"Meta","slug":"meta","country":null,"url":null,"color":"#7B61FF","mark":"M"},"price":{"modelId":"muse-spark-1-2","provider":"meta","inputPerM":null,"outputPerM":null,"blendedPerM":2.0000000000000004,"tokensPerS":null,"observedAt":"2026-10-14","sourceId":"openrouter"},"answer":{"word":"It used to be.","scope":"Was SOTA in General LLM.","lead":"As of Oct 14, 2026, Muse Spark 1.2 from Meta. Was SOTA in General LLM. Was SOTA in General LLM from 2026-09-11 to 2026-10-02. Currently ranked #9.","confidence":"medium"},"verdicts":[{"id":"v_overall_general-llm_muse-spark-1-2_2026-09-11_open_WAS_SOTA","model":"muse-spark-1-2","model_name":"Muse Spark 1.2","category":"general-llm","category_name":"General LLM","slice":"overall","state":"WAS_SOTA","rank":9,"margin":5.517241379310349,"confidence":"medium","valid_from":"2026-09-11","valid_to":null,"configuration":null,"rationale":"Was SOTA in General LLM from 2026-09-11 to 2026-10-02. Currently ranked #9.","safeguard_flags":["dethroned"],"co_sota_with":[],"challengers":[],"methodology":"1.0","label":"Was SOTA · General LLM"},{"id":"v_pareto_general-llm_muse-spark-1-2_2026-10-14_open_NOT_SOTA","model":"muse-spark-1-2","model_name":"Muse Spark 1.2","category":"general-llm","category_name":"General LLM","slice":"pareto","state":"NOT_SOTA","rank":9,"margin":4.255319148936167,"confidence":"medium","valid_from":"2026-10-14","valid_to":null,"configuration":null,"rationale":"Not on the General LLM cost-quality frontier.","safeguard_flags":[],"co_sota_with":[],"challengers":[],"methodology":"1.0","label":"Not SOTA · #9"},{"id":"v_overall_reasoning_muse-spark-1-2_2026-10-14_open_NOT_SOTA","model":"muse-spark-1-2","model_name":"Muse Spark 1.2","category":"reasoning","category_name":"Reasoning","slice":"overall","state":"NOT_SOTA","rank":15,"margin":9.65517241379311,"confidence":"medium","valid_from":"2026-10-14","valid_to":null,"configuration":null,"rationale":"Ranked #15 in Reasoning.","safeguard_flags":[],"co_sota_with":[],"challengers":[],"methodology":"1.0","label":"Not SOTA · #15"},{"id":"v_pareto_reasoning_muse-spark-1-2_2026-10-14_open_NOT_SOTA","model":"muse-spark-1-2","model_name":"Muse Spark 1.2","category":"reasoning","category_name":"Reasoning","slice":"pareto","state":"NOT_SOTA","rank":15,"margin":7.4468085106382915,"confidence":"medium","valid_from":"2026-10-14","valid_to":null,"configuration":null,"rationale":"Not on the Reasoning cost-quality frontier.","safeguard_flags":[],"co_sota_with":[],"challengers":[],"methodology":"1.0","label":"Not SOTA · #15"},{"id":"v_overall_math_muse-spark-1-2_2026-10-14_open_NOT_SOTA","model":"muse-spark-1-2","model_name":"Muse Spark 1.2","category":"math","category_name":"Math","slice":"overall","state":"NOT_SOTA","rank":26,"margin":null,"confidence":"low","valid_from":"2026-10-14","valid_to":null,"configuration":null,"rationale":"Ranked #26 in Math.","safeguard_flags":[],"co_sota_with":[],"challengers":[],"methodology":"1.0","label":"Not SOTA · #26"},{"id":"v_overall_coding_muse-spark-1-2_2026-10-14_open_NOT_SOTA","model":"muse-spark-1-2","model_name":"Muse Spark 1.2","category":"coding","category_name":"Coding","slice":"overall","state":"NOT_SOTA","rank":17,"margin":null,"confidence":"low","valid_from":"2026-10-14","valid_to":null,"configuration":null,"rationale":"Ranked #17 in Coding.","safeguard_flags":[],"co_sota_with":[],"challengers":[],"methodology":"1.0","label":"Not SOTA · #17"},{"id":"v_overall_coding-web-dev_muse-spark-1-2_2026-10-14_open_NOT_SOTA","model":"muse-spark-1-2","model_name":"Muse Spark 1.2","category":"coding-web-dev","category_name":"Coding › Web dev","slice":"overall","state":"NOT_SOTA","rank":38,"margin":35.23809523809524,"confidence":"medium","valid_from":"2026-10-14","valid_to":null,"configuration":null,"rationale":"Ranked #38 in Coding › Web dev.","safeguard_flags":[],"co_sota_with":[],"challengers":[],"methodology":"1.0","label":"Not SOTA · #38"},{"id":"v_pareto_coding-web-dev_muse-spark-1-2_2026-10-14_open_NOT_SOTA","model":"muse-spark-1-2","model_name":"Muse Spark 1.2","category":"coding-web-dev","category_name":"Coding › Web dev","slice":"pareto","state":"NOT_SOTA","rank":41,"margin":32.25806451612904,"confidence":"medium","valid_from":"2026-10-14","valid_to":null,"configuration":null,"rationale":"Not on the Coding › Web dev cost-quality frontier.","safeguard_flags":[],"co_sota_with":[],"challengers":[],"methodology":"1.0","label":"Not SOTA · #41"},{"id":"v_overall_long-context_muse-spark-1-2_2026-08-11_open_WAS_SOTA","model":"muse-spark-1-2","model_name":"Muse Spark 1.2","category":"long-context","category_name":"Long context","slice":"overall","state":"WAS_SOTA","rank":21,"margin":13.698630136986296,"confidence":"medium","valid_from":"2026-08-11","valid_to":null,"configuration":null,"rationale":"Was SOTA in Long context from 2026-08-11 to 2026-08-19. Currently ranked #21.","safeguard_flags":["dethroned"],"co_sota_with":[],"challengers":[],"methodology":"1.0","label":"Was SOTA · Long context"},{"id":"v_pareto_long-context_muse-spark-1-2_2026-10-14_open_NOT_SOTA","model":"muse-spark-1-2","model_name":"Muse Spark 1.2","category":"long-context","category_name":"Long context","slice":"pareto","state":"NOT_SOTA","rank":24,"margin":12.234042553191486,"confidence":"medium","valid_from":"2026-10-14","valid_to":null,"configuration":null,"rationale":"Not on the Long context cost-quality frontier.","safeguard_flags":[],"co_sota_with":[],"challengers":[],"methodology":"1.0","label":"Not SOTA · #24"},{"id":"v_overall_vision_muse-spark-1-2_2026-10-14_open_NOT_SOTA","model":"muse-spark-1-2","model_name":"Muse Spark 1.2","category":"vision","category_name":"Vision","slice":"overall","state":"NOT_SOTA","rank":25,"margin":70.58823529411765,"confidence":"medium","valid_from":"2026-10-14","valid_to":null,"configuration":"xhigh","rationale":"Ranked #25 in Vision.","safeguard_flags":[],"co_sota_with":[],"challengers":[],"methodology":"1.0","label":"Not SOTA · #25"},{"id":"v_pareto_vision_muse-spark-1-2_2026-10-14_open_NOT_SOTA","model":"muse-spark-1-2","model_name":"Muse Spark 1.2","category":"vision","category_name":"Vision","slice":"pareto","state":"NOT_SOTA","rank":25,"margin":70.58823529411765,"confidence":"medium","valid_from":"2026-10-14","valid_to":null,"configuration":"xhigh","rationale":"Not on the Vision cost-quality frontier.","safeguard_flags":[],"co_sota_with":[],"challengers":[],"methodology":"1.0","label":"Not SOTA · #25"},{"id":"v_overall_factuality_muse-spark-1-2_2026-08-21_open_WAS_SOTA","model":"muse-spark-1-2","model_name":"Muse Spark 1.2","category":"factuality","category_name":"Factuality","slice":"overall","state":"WAS_SOTA","rank":11,"margin":7.575757575757578,"confidence":"medium","valid_from":"2026-08-21","valid_to":null,"configuration":null,"rationale":"Was SOTA in Factuality from 2026-08-21 to 2026-10-02. Currently ranked #11.","safeguard_flags":["dethroned"],"co_sota_with":[],"challengers":[],"methodology":"1.0","label":"Was SOTA · Factuality"},{"id":"v_pareto_factuality_muse-spark-1-2_2026-10-14_open_NOT_SOTA","model":"muse-spark-1-2","model_name":"Muse Spark 1.2","category":"factuality","category_name":"Factuality","slice":"pareto","state":"NOT_SOTA","rank":11,"margin":5.847953216374265,"confidence":"medium","valid_from":"2026-10-14","valid_to":null,"configuration":null,"rationale":"Not on the Factuality cost-quality frontier.","safeguard_flags":[],"co_sota_with":[],"challengers":[],"methodology":"1.0","label":"Not SOTA · #11"}]}