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Muse Code

03 cli-agent/Meta/ACTIVE/aka Muse, muse, Muse CLI

Muse Code is Meta's terminal coding agent powered by Muse Spark 1.2 — persistent background subagents, a replay-exact event log, workflow orchestration, and a TypeScript SDK over the Muse Session Protocol.

SEC.01

What it does

  • 01Persistent background subagents
  • 02Event log (replay + resume)
  • 03Workflows
  • 04Skills (/plan, /grill, /goal)
  • 05Rewind + session messaging
  • 06TypeScript SDK
SEC.02

Who it's for

Long-horizon tasks where auditability matters — every tool call, subagent, and steer is logged and replayable.

PRICING

Pricing

Contributor free (5h token windows); subs rolling out; API $1.25/M in · $4.25/M out. List prices as checked against the vendor's pricing page on 2026-09-25; plans change often, so confirm before deciding.

caveat · before you adopt

macOS and Linux only at launch; the contributor tier rate-limits by tokens in rolling 5-hour windows.

ALT

Other CLI agents (14)

Claude Code

Anthropic · cli-agent

cli/editor/api · local · Included in Claude Pro $20/mo and Max ($100/$200); API pay-per-token

Codex CLI

OpenAI · cli-agent

cli/editor/api · local/cloud · Included in ChatGPT Free/Go/Plus/Pro/Business/Enterprise; credits for extra usage

Aider

Community / OSS · cli-agent

caution
cli · local · Free (OSS) + your model API costs

Amp

Amp Inc. · cli-agent

cli/editor · local · Hobby free (BYOK / own runners); Megawatt $20/mo; Gigawatt $200

OpenCode

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cli · local · Free (OSS) + BYOK; Zen PAYG; Go $10/mo

OpenHands

Community / OSS · cli-agent

cli/api/editor · local/cloud · Free OSS self-host; Cloud free tier + $20/mo

Goose

Block · cli-agent

cli · local · Free (OSS) + model costs

Gemini CLI

Google · cli-agent

caution
cli · local · Consumer/free tiers ended Jun 18, 2026; API key or Code Assist Standard/Enterprise only

Warp

Warp · cli-agent

cli · local/cloud · Free; Pro $20/mo; Team $45–50/user; Max $200

Grok Build

xAI · cli-agent

cli/editor/api · local · Free to try; SuperGrok $30/mo or X Premium+ $40/mo; API grok-4.6 $2/M in · $6/M out

Kimi Code

Moonshot AI · cli-agent

cli/editor/api · local · Free OSS; Kimi Code managed service or Moonshot API keys (multi-provider)

Qwen Code

Alibaba Cloud · cli-agent

cli/editor/api · local · Free OSS (Apache-2.0); Alibaba Cloud Coding Plan or any compatible provider

Mistral Vibe

Mistral AI · cli-agent

cli/editor · local · CLI open source; models via Mistral API / Le Chat; Devstral Small self-deployable

Crush

Charm · cli-agent

cli · local · Free OSS (FSL-1.1-MIT); BYO provider keys
FAQ

Frequently asked

What is Muse Code?

Muse Code is Meta's terminal coding agent powered by Muse Spark 1.2 — persistent background subagents, a replay-exact event log, workflow orchestration, and a TypeScript SDK over the Muse Session Protocol.

Who is Muse Code for?

Long-horizon tasks where auditability matters — every tool call, subagent, and steer is logged and replayable.

How much does Muse Code cost?

Contributor free (5h token windows); subs rolling out; API $1.25/M in · $4.25/M out. List prices as checked against the vendor's pricing page on 2026-09-25; plans change often, so confirm before deciding.

Does Muse Code run locally or in the cloud?

Muse Code runs locally on your machine. Its interfaces are a terminal (CLI), an API or protocol.

What are alternatives to Muse Code?

Other CLI agent entries in the catalog: Claude Code, Codex CLI, Aider, Amp, OpenCode, OpenHands, Goose, Gemini CLI, Warp, Grok Build, Kimi Code, Qwen Code, Mistral Vibe, Crush. Different categories solve the same problem differently — see the CLI & terminal agents category page for tradeoffs.

What should I know before adopting Muse Code?

macOS and Linux only at launch; the contributor tier rate-limits by tokens in rolling 5-hour windows.