{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/muse-spark-1-3/","md":"https://postcutoff.com/m/muse-spark-1-3/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"muse-spark-1-3","name":"Muse Spark 1.3","org":"Meta","family":"Muse","released":"2026-09-02","status":"current","type":"reasoning-llm","modality_in":["text","image","video","pdf"],"modality_out":["text"],"open_weights":false,"model_license":"proprietary","context_window":1000000,"max_output":200000,"knowledge_cutoff":null,"pricing":{"input":1.25,"cached_input":0.15,"output":4.25,"unit":"per 1M tokens (USD), standard tier; \"contributor\" tier muse-spark-1.3-contributor is $0.10/$0.002 cached/$0.20","source":"https://dev.meta.ai/models/muse-spark/"},"price_line":"$1.25 in, $4.25 out per 1M tokens","access":[{"provider":"Meta Model API","model_id":"muse-spark-1.3","endpoint":"https://api.meta.ai/v1/chat/completions","docs":"https://dev.meta.ai/docs/"},{"provider":"OpenRouter","model_id":"meta/muse-spark-1.3","url":"https://openrouter.ai/meta/muse-spark-1.3"},{"provider":"Web app","url":"https://meta.ai"}],"capabilities":[{"name":"Closed-weights successor to Llama","detail":"Proprietary model from Meta Superintelligence Labs; Muse Spark replaced Llama in Meta AI in April 2026.","first":false,"discovered":"launch","source":"https://venturebeat.com/technology/goodbye-llama-meta-launches-new-proprietary-ai-model-muse-spark-first-since"},{"name":"Native video + document perception","detail":"Natively multimodal input (video, images, documents, text) with 1M context and 200K max output.","first":false,"discovered":"launch","source":"https://dev.meta.ai/models/muse-spark/"},{"name":"Long-horizon multi-agent tuning","detail":"1.3 tuned for long-running, multi-agent agentic builds; also powers Meta's Muse Code.","first":false,"discovered":"launch","source":"https://x.com/MetaforDevs/status/2095232442953236714"},{"name":"Contributor pricing tier","detail":"Separate -contributor model ids priced ~90% lower (data-sharing tier).","first":false,"discovered":"launch","source":"https://dev.meta.ai/docs/"}],"entry":"2026-09-02-meta-muse-spark-1-3","notes":"Other ids: muse-spark-1.2, muse-spark-1.1, muse-spark-1.3-contributor, muse-spark-1.2-contributor. OpenAI-SDK-compatible API (public preview, self-serve). Contributor tier data terms not verified. Knowledge cutoff not published.","verified":"2026-09-29","body_md":"Meta's current flagship (closed) for agentic coding and multimodal (video/doc) understanding.\n\n```bash\ncurl https://api.meta.ai/v1/chat/completions -H \"Authorization: Bearer $MODEL_API_KEY\" -H \"Content-Type: application/json\" \\\n -d '{\"model\":\"muse-spark-1.3\",\"messages\":[{\"role\":\"user\",\"content\":\"Hello\"}]}'\n```\n\nSources: https://dev.meta.ai/models/muse-spark/ , https://dev.meta.ai/docs/ , https://research.meta.ai/blog/introducing-muse-spark-1-3","page_url":"https://postcutoff.com/m/muse-spark-1-3/","events_after":null,"major_after":null,"historic_after":null,"missing_at_launch":null,"events_since_release":1592,"you_url":"https://postcutoff.com/you/muse-spark-1-3/","briefings":null}