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Meta Muse Spark 1.2 & Muse Code Explained 2026: Terminal Coding Agent, Subagents, Pricing

Meta's Muse Code, launched August 5, is a terminal coding agent powered by the new Muse Spark 1.2 model. It plans, writes, and validates across large repos using multiple persistent subagents, connected to the Meta Model API. Standard pricing $1.25/$4.25 (1M context); a contributor tier is $0.10/$0.20.

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On August 5 Meta launched Muse Code in beta — a terminal coding agent — powered by a new model, Muse Spark 1.2. It’s a rival to the Claude Code / Codex class of tools. It plans changes, writes code, and validates results, coordinating multiple subagents to get there.

What launched?

  • Muse Code = a terminal coding agent (macOS/Linux, single-command install, no dedicated app)
  • Plans -> writes -> validates across large repos, coordinating multiple persistent subagents
  • Powered by Muse Spark 1.2 — better code generation, complex debugging, codebase understanding, end-to-end workflows
  • Connects directly to the Meta Model API

Muse Code launch

It’s Meta’s third release in four months, reportedly tying for third among US labs. The low-cost, efficient coding-model trend also shows in Alibaba Qwen3.8-Max and DeepSeek V4 Flash.

Why it matters

The core is the shift to agentic development. Not autocomplete, but an agent that sits on a large codebase in the terminal, plans on its own, and splits work across subagents. Meta says it increased coding training compute and expanded training environments. It stands in the same ring as frontier coders like Claude Opus 5.

Pricing

Tier Input Output Note
Standard $1.25 $4.25 ~1,048,576-token context
Contributor $0.10 $0.20 lets Meta train future models on your prompts

Pricing and performance

The cheaper tier trades privacy for price, so it’s a judgment call for sensitive work.

Frequently Asked Questions

Q. What is Muse Code? A terminal coding agent. It installs on macOS/Linux with one command, connects to the Meta Model API, and handles plan -> write -> validate across large repos using multiple subagents.

Q. What is Muse Spark 1.2? The new model powering Muse Code, with stronger code generation, debugging, codebase understanding, and end-to-end workflows.

Q. Why is the contributor tier so cheap? At $0.10 input / $0.20 output it’s very cheap, but in exchange you permit Meta to train future models on your prompts. Use the standard tier for sensitive data.

#Muse Spark 1.2#Muse Code#Meta#coding agent#AI model
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