Meta: Muse Spark 1.3

Name: Meta: Muse Spark 1.3
Author: Meta AI

Meta AI🇺🇸 United States

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Context window1000K tokens

Version History

1.3minorSeptember 2, 2026

Meta released Muse Spark 1.3, a multimodal reasoning model with a 1M-token context window aimed at long-running agentic, multi-agent, and coding workflows. Audio input handling remains incompletely supported in this version.

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Meta Releases Muse Spark 1.3, a Free Multimodal Reasoning Model with 1M-Token Context

Meta has released Muse Spark 1.3, a multimodal reasoning model with a 1M-token context window, listed as free on OpenRouter. The model targets long-running agentic, multi-agent, and coding workflows, though audio input support remains incomplete.

September 2, 2026 · 7:50 PM2 min read

Meta Muse Spark multimodal