Muse Spark 1.3
Meta’s flagship for coding and long-horizon agents
What it does
Muse Spark 1.3 is Meta’s latest flagship for agentic work and coding. Same $1.25 / $4.25 API price as 1.2, with about 20% fewer tool calls and 25% fewer tokens on coding in Meta’s own comparisons. It leads DeepSWE v1.1 at 75.4 and ties Terminal-Bench 2.1 at 88.8. Live today in Muse Code and the Meta Model API. Max reasoning follows after safety testing.
Introducing Muse Spark 1.3, with max reasoning for challenging reasoning and agentic tasks and improved real-world usability.
Try Meta AI Introducing Muse Spark 1.3 September 2, 2026 · 3 minute read We’re excited to release Muse Spark 1.3, which delivers improved performance across agentic and coding tasks. Drawing on what we learned from months of broad adoption of Muse Code and Meta Model API, we’ve also made this model easier to use in real-world settings. Smarter and more practically useful, Muse Spark 1.3 advances our work toward personal superintelligence. Muse Spark 1.3 with max reasoning is now available on Muse Code and Meta Model API. Get started at dev.meta.ai . Muse Spark 1.3 is designed to better sustain longer-horizon work by collaborating with users and juggling multiple workflows in a single, long…from research.meta.ai
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