Muse Code

Meta's terminal coding agent, built on Muse Spark 1.2, now bundled into the new Meta Enterprise Platform for business customers.

Meta · Developer tools and coding agents · tool

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Overview

Meta launched Muse Code as a beta terminal coding agent on August 5, 2026, running on the coding-focused Muse Spark 1.2 model, alongside command-line agents like Claude Code, Codex CLI, and Grok CLI. It runs from the command line, writing and editing code directly in a project, with bundled skills such as /plan (turns a task into an approval-gated plan), /grill (stress-tests that plan), and /goal (drives the agent toward a stated objective). It supports persistent sub-agents in isolated worktrees with a crash-safe event log and a 1M-token context window for long-horizon repository work, and can fan out multiple sub-agents into isolated worktrees for parallel tasks. On September 28, 2026, Meta folded Muse Code into its new Meta Enterprise Platform division as the coding-agent component of its business and developer offering; on Meta's own published coding benchmarks, Claude Opus 5 still leads all three comparison benchmarks.

This is a sourced directory entry. Features and capabilities are reported in the linked sources; this entry does not document independent Aymorphic testing.

Key features

  • Built on Muse Spark 1.2, a coding-focused update to Muse Spark 1.1
  • Bundled skills: /plan, /grill, and /goal for approval-gated, stress-tested task execution
  • Persistent sub-agents in isolated worktrees with a crash-safe event log
  • 1M-token context window intended to make long coding sessions resumable
  • Agent fan-out to run multiple sub-agents on parallel work without collisions
  • Now positioned as the coding-agent component of Meta Enterprise Platform

Use cases

  • Terminal-based agentic coding and codebase editing
  • Long-horizon repository work needing resumable sessions
  • Parallel multi-task development via sub-agent fan-out
  • Enterprise adoption via Meta Enterprise Platform

Pricing

unknown -- pricing not independently confirmed; bundled into Meta Enterprise Platform, which has not disclosed pricing.

Pricing reflects the source record and may change. Confirm current terms with the provider.

Dates and sources

Released
5 Aug 2026
Record updated
29 Sept 2026
Record last checked
29 Sept 2026

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