Meta Superintelligence Labs releases Muse Spark 1.3
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Muse Spark 1.3 released — claims improvements in agent, coding, instruction-following and long-context evaluations. Company claims: about 20% fewer tool calls and about 25% fewer tokens than Muse Spark 1.2. The comparisons are with Muse Spark 1.2, GPT 5.6 Sol (max) and Opus 5 (max), but the post gives no numerical scores and shows them only in charts. Available in Muse Code and the Meta Model API; the weights are not released, and an open-weight release is mentioned only on the roadmap
Why it matters
MSL keeps to its closed-API route while putting agent efficiency (fewer tool calls and tokens) forward as its headline metric
Source — Primary sources first; secondary reports are labelled “Press”
Officialresearch.meta.aihttps://research.meta.ai/blog/introducing-muse-spark-1-3Added in Week 36, 2026 · See that week
On the map — ③ Tools & Agents line
- Previous stopAnthropic publishes Code Execution with MCP
- This record · stopMuse Spark 1.3
- Next stopRenmin University researchers release the Agent-Editing World Model (AEWM)
In the model family tree — Llama family · 12 versions
- Earlier versionMuse Glimmer 30B
- This recordMuse Spark 1.3
- Later versionMuse Spark Open