Overview
- Muse Code, which Meta launched Wednesday, is a beta terminal coding agent for macOS and Linux that can plan changes, write and validate code, and coordinate persistent background subagents to tackle large repositories.
- Muse Spark 1.2 was co‑trained with Muse Code and is available today through Muse Code and the Meta Model API with expanded global access after being trained for long‑horizon workflows.
- Meta published standard API prices of $1.25 per million input tokens and $4.25 per million output tokens and introduced a contributor tier that Meta says is more than ten times cheaper in exchange for opt‑in developer data to improve models.
- The system logs every model call, tool run, approval, and edit to a local event log so runs are replay‑exact and restart‑safe, and it uses isolated worktrees and subagents to make long, multi‑step jobs more reliable.
- Meta is pitching Muse as a cost‑competitive challenger to Anthropic and OpenAI, and it is using internal engineer corrections from the MetaCode program (about 7,000 weekly users and 800+ fixes reported) to refine the models, a move that could change how coding agents are trained and priced.