Meta launches Muse Code AI coding agent for macOS and Linux

Meta has launched Muse Code, a terminal-based AI coding agent now in beta for macOS and Linux, powered by the new Muse Spark 1.2 model, which can plan changes, write code, validate work, and coordinate persistent background agents. The model is also available via the Meta Model API with expanded global access, following the July release of Muse Spark 1.1.

Meta is entering the AI coding-agent race with Muse Code, a new terminal-based tool now available in beta for macOS and Linux. Muse Code arrives alongside Meta’s new Muse Spark 1.2 model Powered by the new Muse Spark 1.2 model, it is designed to handle complex software engineering work across large repositories. For Mac users, Muse Code installation is a one-line command https://research.meta.ai/blog/introducing-muse-code-and-muse-spark-1-2 : curl -fsSL https://dev.meta.ai/install.sh | bash Unlike ChatGPT Codex and Claude Code, there’s currently no dedicated app interface for Muse Code. Meta says Muse Code can plan changes, write code, validate its work, and coordinate persistent background agents that remain active throughout a session. Its local event log records model calls, tool use, approvals, and edits, allowing work to resume after a crash. Built-in commands can also generate a plan, stress-test it, or continue working toward a specified goal. Muse Spark 1.2 is described as a coding-focused update with gains in code generation, debugging, codebase understanding, and long-running developer workflows. The model is available through both Muse Code and the Meta Model API with expanded global access. The release follows Meta’s July launch of Muse Spark 1.1, which upgraded the model’s agentic and multimodal abilities and introduced Meta’s paid API service for developers. Before that, Meta replaced Llama with the original Muse Spark https://9to5mac.com/2026/04/08/goodbye-llama-meta-unveils-muse-spark-ai-with-new-contemplating-mode/ in April, then used it to expand the Meta AI app https://9to5mac.com/2026/05/12/meta-ai-app-enhanced-with-new-features-using-muse-spark-heres-whats-new/ and power new image-generation features https://9to5mac.com/2026/07/07/meta-ai-app-adds-image-generation-also-powering-whatsapp-and-instagram-features/ across Meta’s apps. Do more with your Apple products Apple AirTag 2 | Add Find My tracking to keys, bags, bikes, more https://amzn.to/4vjNWN1 AirPods 4 | Apple’s newest wireless headphones https://amzn.to/43ndewV AirPods Pro 3 | Apple’s best wireless headphones https://amzn.to/4ut3FYp Beats USB-A to USB-C Cable | The official CarPlay cable https://amzn.to/4mpKs7K FTC: We use income earning auto affiliate links. More. https://9to5mac.com/about/ affiliate our homepage http://9to5mac.com/ for all the latest news, and follow 9to5Mac on exclusive stories https://9to5mac.com/feature/exclusive/ , reviews https://9to5mac.com/guides/review/ , how-tos https://9to5mac.com/guides/how-to/ , and subscribe to our YouTube channel https://www.youtube.com/9to5mac