AI coding agent (CLI)
Muse Code
Muse Code is Meta's terminal coding agent, launched in beta on August 5, 2026 alongside Muse Spark 1.2, a model Meta trained together with the harness. It runs locally but calls Meta's hosted models, and it splits each task between parallel worker agents and background reviewers. It is closed source and only runs Muse Spark models, so it suits developers who want to try Meta's models in a Claude Code-style workflow rather than teams that need provider choice.
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Coding
Best for
- Developers who want to evaluate Muse Spark 1.2 and 1.3 for coding
- Tasks that benefit from parallel workers with a built-in review pass
- Low monthly budgets: paid plans start at $5
Not best for
- Teams that need to choose or self-host the model
- Organizations that require open-source tooling
- Linux users: Meta documents macOS and Windows support
Quick facts
- Vendor
- Meta
- Category
- AI coding agent (CLI)
- Platforms
- Terminal, macOS, Windows
- Integrations
- Muse Spark, Git
- Pricing
- Free to install; model usage requires a plan. Everyday Usage is $5 monthly, High Usage $15, and Power Usage $50.
In Depth: Muse Code
Key features
- Parallel worker agents with reviewers running in the background
- Muse Spark 1.3 and 1.2 models, co-trained with the harness
- Traceable actions so you can review each decision and change
- Subagents that work in isolated git worktrees
- One-line shell install
Pricing and access
Free to install; model usage requires a plan. Everyday Usage is $5 monthly, High Usage $15, and Power Usage $50.
Plans and limits change often. Confirm current pricing on dev.meta.ai/products/muse-code/ before you commit.
