OpenRouter (@OpenRouter) · 10/16/2026, 02:02:06
Meta Releases Muse Spark Open: 816B MoE Model for Agentic Coding with 1M Context and Multimodal Input
Meta AI has released Muse Spark Open, claiming it is the strongest open-weight model from a US lab to date. Built for agentic coding, this 816B total / 42B active parameter MoE model supports a 1M token context window and native multimodality across text, image, video, and audio. It is now available on OpenRouter at $1.25/M input and $4.25/M output.
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Muse Spark Open from @AIatMeta is now available on OpenRouter!
- strongest open-weight model from a US lab
- built for agentic coding
- 1M context
- fully multimodal: image, video, audio and PDF input
- 4.25/M out
↳ 引用 @AIatMeta (AI at Meta): Today we’re releasing Muse Spark Open, the most capable US open-weight model to date.
Built for coding and agentic work, it excels at long-horizon tasks, complex software engineering, and multi-step reasoning.
Key Model Specs: → 816B total / 42B active parameters → 1M token context window → Natively multimodal across text, image, video, audio