Meta · Model release
Muse Spark 1.2: a model co-trained with its coding harness
Muse Spark 1.2 is Meta's coding-focused model update, trained with Muse Code to improve long-horizon repository work and tool use.
What changed
- Meta scaled coding-task training and broadened the environments used during training.
- The model and Muse Code were co-trained together rather than treated as a generic model-wrapper pair.
- A standard API tier and a cheaper contributor tier expose different data-use terms.
Best fit
- Long-running coding agents
- Repository-scale tasks
- Meta Model API users
What to be careful about
- The model is proprietary and Muse Code is still beta.
- Contributor pricing is cheaper but says usage is used to improve Meta's products.
Dataset snapshot: Muse Spark 1.2 is also represented in the checked comparison dataset. Prices and benchmark figures carry their own field dates.