Meta Muse Spark Open goes live on Together AI

Together AI said Meta’s Muse Spark Open is live on its platform on October 15, 2026, making the open-weight model available through serverless and dedicated infrastructure on the day of launch. The company described itself as a day-zero launch partner and said early-access customers had already tested the model before release. In its announcement, Together AI said Muse Spark Open is designed for long-running agentic coding workflows that keep entire codebases in context, as well as computer use, web automation and multimodal understanding of documents, images, audio and video. The company said the model has a 1M-token context window, supports long-horizon autonomy, and can plan, act, observe and self-correct over extended tasks.

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