We’re excited to release Muse Spark 1.3 with improved performance on agentic and coding tasks, and a focus on real-world usability.
Key capabilities:
→ Sustains longer-horizon work across multiple workflows in a single thread
→ More actively collaborates with users: it asks clarifying questions, flags when it's stuck, confirms before consequential actions
→ Better calibrated on its own limits instead of hallucinating outcomes
→ ~20% fewer tool calls and ~25% fewer tokens vs. Muse Spark 1.2 in internal comparisons
Muse Spark 1.3 is rolling out today in Muse Code and Meta Model API at https://t.co/EMi0nXEvtz, with max reasoning coming soon after we finish safety testing.
Learn more: https://t.co/I0IjQwpd8Q
Stay tuned for more updates soon, including bigger models, Muse Spark open weights, and more. 🚀
token — The chunk of text a model reads and writes in — roughly three-quarters of a word — and the unit AI usage is billed in.
open weights — A model whose trained parameters are published for anyone to download and run — unlike API-only models you can access but never possess.
AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.
Why it matters
A coding model that uses about 20% fewer tool calls and 25% fewer tokenThe chunk of text a model reads and writes in — roughly three-quarters of a word — and the unit AI usage is billed in.Full definition → per task changes AI agentAn AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.Full definition → run cost directly, and the promised open weightsA model whose trained parameters are published for anyone to download and run — unlike API-only models you can access but never possess.Full definition → would let teams run it themselves.
