Model
Muse Spark 1.3.
Power
—
API cost
by Meta · released 2 September 2026
In plain English
Meta's main model for coding and agent work at scale.
Good for
Coding, reasoning over long documents, and repeated tool use.
Things to be aware of
Meta offers a cheaper version that may use your content to improve its products, so check which one you're buying.
What Meta says
“Muse Spark 1.3 is “trained for long-horizon, agentic workflows”.”
- Context window
- 1.0M tokens
- Run it yourself
- No, online only