Overview
Muse Spark 1.3 is built for longer-horizon coding and agent work, improving multitasking, plan correction, and tool-use efficiency in real engineering workflows.
Muse Spark 1.3
Muse Spark 1.3 is built for longer-horizon coding and agent work, improving multitasking, plan correction, and tool-use efficiency in real engineering workflows.
MODEL NUMBER106
- Release date
- 2026-09-02
- Organization
- Meta
- Family
- Muse
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Specifications
Only published specifications are shown.
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Overview
Why it mattered
Compared with 1.2, Meta engineers report roughly 20% fewer tool calls and 25% fewer tokens, with stronger practical performance on long-horizon agents.
PreviousMuse Spark 1.2— · 1M ctx
CurrentMuse Spark 1.3— · — ctx
New capabilities Long-horizon agent multitasking
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Architecture & capabilities
Key capabilities
CodingComputer useMulti-agentTool useLong-horizon agentmultitasking
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Release history
Muse Spark 1.3 launched and began rolling out in Muse Code and Meta Model API.
View source06
Related models
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