Model · Multimodal language model
Muse Spark 1.3
The newest API-served Muse Spark checkpoint with max reasoning, a 1,048,576-token context, and reduced token and tool-call usage, available through the Meta Model API and Muse Code without downloadable model weights.
- Developer
- Meta
- Distribution
- Developer API
- Artifact licensing
- Proprietary access
- License scope
- Reviewed release artifacts and mandatory terms; not an assessment of training code or training data openness.
- Licenses
- Meta Model API Terms of Service
- Boundary
- This record represents the Muse Spark 1.3 checkpoint announced September 2, 2026 and served under the Meta Model API. The 1.1 and 1.2 checkpoints, the contributor tier, Muse Code, and reseller surfaces remain separate boundaries.
Risk statements
Not yet examined.
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