Meta unveils Muse Code AI agent to rival Codex and Claude Code
Developed over time first seen 3 months ago
Meta has launched Muse Code, a beta terminal-based AI coding agent designed to help developers complete complex engineering work across large software repositories. The release matters because it places Meta more directly in competition with OpenAI’s Codex and Anthropic’s Claude Code, as the company seeks a stronger position in enterprise AI tools.
Muse Code uses Meta’s Muse Spark coding model and can plan changes, write code and validate results. For larger jobs, it divides work among parallel sub-agents in isolated worktrees, leaving the developer’s working copy untouched; Meta says it tested the approach by building six game features simultaneously without conflicts. Meta’s AI chief Alexandr Wang said the product could be particularly competitive on cost, following the company’s broader investment in AI and recent expansion into enterprise customer-support agents.
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In short
- Meta launches beta coding agent for large software repositories.
- Muse Code uses parallel agents in isolated worktrees.
- Meta aims to challenge Codex and Claude Code on cost.
How this story developed
- 3 months ago Further detail emerged on Zuckerberg's framing of the tool's capabilities, quoting him on its ability to plan, write and validate code, while AI chief Alexandr Wang stressed its cost advantage as part of Meta's wider enterprise AI push that included June's customer service agent rollout.
- 3 months ago Meta launched Muse Code, a beta terminal-based AI coding agent built on its Muse Spark model that splits large jobs across parallel sub-agents in isolated worktrees, positioning it against OpenAI's Codex and Anthropic's Claude Code.
Explained simply
Muse Code is a new artificial intelligence tool from Meta, the company behind Facebook and Instagram, that is designed to help write and fix computer programs. It works from a command line rather than a visual app, and can plan out changes, write the code itself, and check that the results work, all with limited human input. Meta has released it in a test, or "beta", version.
The tool enters a market already led by OpenAI, the company behind ChatGPT, and Anthropic, which makes the Claude chatbot, both of which have their own AI coding assistants called Codex and Claude Code respectively. Meta has been seen as behind in this area, and its chief executive, Mark Zuckerberg, along with AI chief Alexandr Wang, have been promoting Muse Code as a serious rival on capability and cost.
The launch matters because AI tools that can write software are increasingly seen as central to the future of the technology industry, potentially changing how programmers work and how much software costs to build. Meta's move is part of a wider effort by the company to expand its AI offerings for businesses, following earlier steps such as tools for automated customer service.
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Originally published by TechCrunch as “Meta launches Muse Code, an AI agent for large code bases”.