Muse launches Spark 1.3, a proactive agentic model update, third release in three days

bowenc0221 · x · 2026-09-03

Muse (@lindugong) announced Muse Spark 1.3, described as a strong agentic update to the Spark series: the model is more proactive and better suited for long-horizon work and real-world users.

This is Muse Spark Labs' third launch in three days, following coding and voice releases, with 1.3 focused on agents.

Related event: Meta Launches Muse Spark 1.3, Focusing on Long-Horizon Agents and Coding(14 posts)→

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