Muse Code is powered by Muse Spark 1.2, Meta’s latest coding-focused model, and is designed to work across large software repositories. It can plan changes, write code, and validate the results rather than stopping after generating a code snippet. Meta has launched Muse Code, a terminal-based coding agent that completed more than 1,000 tool calls during a test lasting up to 24 hours, as the company pushes its latest coding model toward longer and more complex software tasks. Muse Spark 1.2 worked inside Muse Code to write, compile, profile and repeatedly improve GPU kernels over more than 1,000 tool calls, with individual runs lasting up to 24 hours. Muse Code also uses a local event log that records model calls, tool runs, approvals, and edits.