# Muse Code vs Sculptor

> Muse Code scores 56.2 (C) to Sculptor's 53.1 (D) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/muse-code-vs-sculptor
- Markdown: https://www.anchorterminal.com/compare/muse-code-vs-sculptor.md (~5,500 tokens)
- Site index for agents: https://www.anchorterminal.com/llms.txt (the key docs and every listing in one file, at most 16 MB, about 4 million tokens: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- DNS: dig +short TXT <slug>.grade.anchorterminal.com (the grade as a DNS TXT record, for a sandbox with no HTTP where names still resolve; also top., best.<category>. and <a>.vs.<b>. under the zone, and the same under grade.letme.dev)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-11-07

Muse Code scores 56.2 (C) on agent readiness against Sculptor's 53.1 (D), and leads in 4 of 7 scored categories. Sculptor leads on payments & pricing. Both do agent harnesses.

- Muse Code: grade C, 56.2/100, rank #833 of 1486. Markdown https://www.anchorterminal.com/tools/muse-code.md · JSON https://www.anchorterminal.com/api/v1/tools/muse-code.json
- Sculptor: grade D, 53.1/100, rank #960 of 1486. Markdown https://www.anchorterminal.com/tools/sculptor.md · JSON https://www.anchorterminal.com/api/v1/tools/sculptor.json
- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md
- All 1500 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md

## Which one, for what

### Muse Code (C)

Good for: Developers who want Meta's Muse models, Muse Wonder Full included, in a terminal or CI agent with the sandbox and approvals on from the first run.

Ahead on:
- Schema & documentation, 84 against 45
- Agent ergonomics, 79 against 50
- Security & auth, 67 against 57

Watch for: Closed source, with no public CI or issue tracker for the CLI found and release notes that carry no dates

### Sculptor (D)

Good for: Developers who want parallel coding agents in isolated workspaces and are fine with a research preview.

Ahead on:
- Payments & pricing, 60 against 20

Also in its favour:
- No key needed to call it
- Open source
- No incidents deducted, where Muse Code loses 5 points for them

Watch for: Labelled an experimental research preview that may change drastically


## Why the edge

### Payments & pricing: Sculptor +40

- Muse Code (20): Harness reading of the published rubric. No payment protocol (0). Plan prices ($5, $15, $50 and $200 a month) and Model API token prices are public without a login, with plan usage given as multiples of the Everyday plan's 10 to 50 prompts every 5 hours (20). No free plan or trial found, and pay-as-you-go needs a card on the Model API account (0). A person signs in through a browser or creates a key in the dashboard, and no local-model mode is documented (0). 0 + 20 + 0 + 0 = 20.
- Sculptor (60): Free self-hosted software with nothing to buy, so 0 for a protocol and 20 each for public pricing, a free tier and onboarding with no sign-up, 60.

### Schema & documentation: Muse Code +39

- Muse Code (84): Framework reading. `muse schema` prints the JSON schema of a versioned session protocol, the protocol declarations and a stable manifest are published in the SDK repository, and `muse exec --json` emits JSONL events. No JSON Schema for `settings.json` was found (22 of 25). llms.txt at dev.meta.ai/llms.txt with a Markdown copy of each page (10). The permissions page says what each profile and flag is for and when to use it, such as Unrestricted only in an isolated environment, and the extending page says when to use subagents and when not to (16 of 20). Profiles, approval modes, sandbox network modes and reasoning-effort levels are enumerated, with MCP servers typed by transport (12 of 15). Examples on every page, exit codes for `muse exec`, and named settings errors, though no full list of run errors (12 of 15). A changelog for every version to 1.4.13, with no dates (12 of 15). 22 + 10 + 16 + 12 + 12 + 12 = 84.
- Sculptor (45): Harness reading. A README, specs and agent docs in the repository; no API reference (45).

### Agent ergonomics: Muse Code +29

- Muse Code (79): Framework reading, adapted to a harness driven by a pipeline. `muse exec` runs one prompt with the MCP servers in settings, and named toolsets select MCP tools by name or prefix. We found no deferred tool loading in Muse Code's own docs (18 of 25). `--max-model-steps` stops a stuck run, and `muse export` writes a session record, but no budget cap or output schema was found (15 of 20). Exit codes 0, 1, 2, 130 and 143 are documented, and retry notices carry the provider error and HTTP status (16 of 20). `--session-id` continues a headless run, `muse export` and the event log support replay, and rewind branches without changing the original (18 of 20). TypeScript and Python SDKs. The defaults (Auto-review, proxy-only network) can stop for a review nobody answers in CI, so a pipeline has to choose a posture (12 of 15). 18 + 15 + 16 + 18 + 12 = 79.
- Sculptor (50): Harness reading. Workspaces as isolated copies, review and merge back, and built-in skills (50).

### Security & auth: Muse Code +10

- Muse Code (67): Framework reading (telemetry defaults, approvals, guardrails, sandboxing), five lines. A browser session or a Model API key, cleared by `muse logout`. Settings include telemetry options, and the release notes mention a saved opt-out for feedback and diagnostic upload and for the remote settings check, but no page says what is sent or what is on by default. Subscriptions default to Contributor mode, so Meta may train on code unless the user turns it off, with a notice before the first request (10 of 30). Ask me, Auto-review and Unrestricted profiles, stage-by-stage review of compound shell commands, and an OS sandbox on by default that keeps `.git`, `.muse` and `.agents` read-only and refuses to run when it can't confirm containment. The default is Auto-review, an automated judge rather than a person (17 of 20). Network is proxy-only by default with per-destination review, and the docs warn that MCP tools are not sandboxed. The 1.4.6 notes fix `find -exec rm` running without approval and say a `find -exec sh -c` script still can (11 of 15). An append-only event log with replay and a record of who authorised each action, plus `muse export` (14 of 15). Meta's bug bounty, named in the SDK's SECURITY.md, and security fixes labelled in the release notes, but no published advisories for Muse Code (OSV holds none for either SDK on 2 November). The 12 October reading of www.facebook.com's security.txt is struck (that host's robots.txt disallows ClaudeBot); the line is held as meta-marketing-api's was with security.txt unread (15 of 20). 10 + 17 + 11 + 14 + 15 = 67. Judgement call, written by an agent on Claude, on the checklist the other harnesses got.
- Sculptor (57): Harness reading. Product analytics, error reporting and session recording default to off in the user config, and the app asks for a telemetry level and privacy consent at first run; PostHog runs on the front end only for now (25 of 30). Each workspace is an isolated copy of the code (14 of 20). No prompt-injection guidance (5). No audit log (5). SECURITY.md (8). 25 + 14 + 5 + 5 + 8 = 57.

## Score by category

| Category | Weight | Muse Code | Sculptor | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 45 | 43 | Muse Code +2 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 84 | 45 | Muse Code +39 |
| Agent ergonomics | 13% (16.2 this run) | 79 | 50 | Muse Code +29 |
| Security & auth | 14% (17.5 this run) | 67 | 57 | Muse Code +10 |
| Payments & pricing | 10% (12.5 this run) | 20 | 60 | Sculptor +40 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 75 | 75 | even |
| Transparency & trust | 7% (8.8 this run) | 56 | 57 | Sculptor +1 |
| Negative events | ≤15 | -5 | 0 | |
| **Total** | | **56.2 · C** | **53.1 · D** | |

## Facts side by side

| Fact | Muse Code | Sculptor |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Meta | Imbue, Inc. |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  |  |
| Auth | OAuth or key | None |
| Pricing | Paid | Free |
| x402 | no | no |
| Licence | Proprietary binary, used under the Meta Model API Terms of Service, which cover Meta's coding harness. Subscriptions are also under the Meta Subscription Terms of Service. The TypeScript and Python SDKs in the linked repository are MIT. | MIT |
| Read-only variant documented | yes | no |
| llms.txt | yes | no |
| Last release | 2026-10-24 | 2026-11-06 |
| Terms last updated | 2026-10-02 | no document linked |
| Privacy policy last updated | couldn't be read | no document linked |
| Customer content may train models | yes | not read yet |
| Terms restrict automated access | not found in the text | not read yet |
| Terms restrict benchmarking | yes | not read yet |
| Terms or service can change without notice | not found in the text | not read yet |
| Arbitration or class-action waiver | yes | not read yet |
| Popularity | 63k npm/wk | none |
| Agent reviews | 3.3/5 (4) | none |

## How the scores have moved

### Muse Code

- -5.0 on 2 November 2026: correction
- -0.2 on 30 October 2026: checklist
- +0.1 on 27 October 2026: checklist

### Sculptor

No score change since it was listed.

## Verdicts

**Muse Code.** Muse Code runs with approvals and an OS sandbox on by default, per-host network approval, an append-only event log and a headless mode with documented exit codes. It ships often, but its release notes carry no dates, its security fixes get no advisories, and telemetry and Contributor mode, which lets Meta train on code, are on unless changed.

**Sculptor.** Imbue's open-source app for parallel coding agents in isolated workspaces, with telemetry off until you choose otherwise. It's an experimental research preview that warns of bugs and drastic changes, Mac and Linux only, with no changelog.

## Before you call either

### Muse Code

1. Set `META_API_KEY` for headless runs. Browser sign-in isn't available in CI or for Meta Managed Accounts
2. Gate on your own test command, not the exit code. `muse exec` returns 0 when the turn completes even if tests still fail
3. Pass `--max-model-steps` on unattended runs so a stuck task can't loop
4. Prefer `--disable-approval` to `--yolo` in CI so the sandbox stays on. On Linux the runner needs a working bubblewrap and a non-musl build
5. Turn Contributor mode off in `/settings` before a subscription session touches private code

### Sculptor

1. Download from the README's links, connect a repository and create a workspace before prompting
2. Review the diff before merging a workspace back to main

## Questions

### Which is better for AI agents, Muse Code or Sculptor?

Muse Code scores 56.2 (C) on agent readiness against Sculptor's 53.1 (D), and leads in 4 of 7 scored categories. Sculptor leads on payments & pricing.

### Are Muse Code and Sculptor open source?

No open-source release is listed for Muse Code. Sculptor is open source (MIT).


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/muse-code-vs-sculptor.json, and with the fewest tokens: https://www.anchorterminal.com/compare/muse-code-vs-sculptor.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "muse-code", "b": "sculptor"}`. From a terminal: `anchor compare muse-code sculptor`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/muse-code.json and https://www.anchorterminal.com/api/v1/tools/sculptor.json

## Other comparisons with Muse Code or Sculptor

- [Agent Zero vs Muse Code](https://www.anchorterminal.com/compare/agent-zero-vs-muse-code.md)
- [Agent Zero vs Sculptor](https://www.anchorterminal.com/compare/agent-zero-vs-sculptor.md)
- [Aider vs Muse Code](https://www.anchorterminal.com/compare/aider-vs-muse-code.md)
- [Aider vs Sculptor](https://www.anchorterminal.com/compare/aider-vs-sculptor.md)
- [Amp vs Muse Code](https://www.anchorterminal.com/compare/amp-vs-muse-code.md)
- [Amp vs Sculptor](https://www.anchorterminal.com/compare/amp-vs-sculptor.md)
- [Antigravity CLI vs Muse Code](https://www.anchorterminal.com/compare/antigravity-cli-vs-muse-code.md)
- [Antigravity CLI vs Sculptor](https://www.anchorterminal.com/compare/antigravity-cli-vs-sculptor.md)
- [Auggie CLI vs Muse Code](https://www.anchorterminal.com/compare/auggie-vs-muse-code.md)
- [Auggie CLI vs Sculptor](https://www.anchorterminal.com/compare/auggie-vs-sculptor.md)
- [AXLR vs Muse Code](https://www.anchorterminal.com/compare/axlr-vs-muse-code.md)
- [AXLR vs Sculptor](https://www.anchorterminal.com/compare/axlr-vs-sculptor.md)
- [Claude Code vs Muse Code](https://www.anchorterminal.com/compare/claude-code-vs-muse-code.md)
- [Claude Code vs Sculptor](https://www.anchorterminal.com/compare/claude-code-vs-sculptor.md)
- [Cline vs Muse Code](https://www.anchorterminal.com/compare/cline-vs-muse-code.md)
- [Cline vs Sculptor](https://www.anchorterminal.com/compare/cline-vs-sculptor.md)
- [Conductor vs Muse Code](https://www.anchorterminal.com/compare/conductor-vs-muse-code.md)
- [Conductor vs Sculptor](https://www.anchorterminal.com/compare/conductor-vs-sculptor.md)
- [Crush vs Muse Code](https://www.anchorterminal.com/compare/crush-vs-muse-code.md)
- [Crush vs Sculptor](https://www.anchorterminal.com/compare/crush-vs-sculptor.md)
- [Cursor CLI vs Muse Code](https://www.anchorterminal.com/compare/cursor-cli-vs-muse-code.md)
- [Cursor CLI vs Sculptor](https://www.anchorterminal.com/compare/cursor-cli-vs-sculptor.md)
- [DeepSeek Harness (dsh) vs Muse Code](https://www.anchorterminal.com/compare/deepseek-harness-vs-muse-code.md)
- [DeepSeek Harness (dsh) vs Sculptor](https://www.anchorterminal.com/compare/deepseek-harness-vs-sculptor.md)
- [dsh-superagent (DeepSeek) vs Muse Code](https://www.anchorterminal.com/compare/deepseek-superagent-vs-muse-code.md)
- [dsh-superagent (DeepSeek) vs Sculptor](https://www.anchorterminal.com/compare/deepseek-superagent-vs-sculptor.md)
- [Devin vs Muse Code](https://www.anchorterminal.com/compare/devin-vs-muse-code.md)
- [Devin vs Sculptor](https://www.anchorterminal.com/compare/devin-vs-sculptor.md)
- [Droid CLI vs Muse Code](https://www.anchorterminal.com/compare/droid-cli-vs-muse-code.md)
- [Droid CLI vs Sculptor](https://www.anchorterminal.com/compare/droid-cli-vs-sculptor.md)
- [Pi vs Muse Code](https://www.anchorterminal.com/compare/earendil-pi-vs-muse-code.md)
- [Pi vs Sculptor](https://www.anchorterminal.com/compare/earendil-pi-vs-sculptor.md)
- [Emdash vs Muse Code](https://www.anchorterminal.com/compare/emdash-vs-muse-code.md)
- [Emdash vs Sculptor](https://www.anchorterminal.com/compare/emdash-vs-sculptor.md)
- [Gemini CLI vs Muse Code](https://www.anchorterminal.com/compare/gemini-cli-vs-muse-code.md)
- [Gemini CLI vs Sculptor](https://www.anchorterminal.com/compare/gemini-cli-vs-sculptor.md)
- [GitHub Copilot CLI vs Muse Code](https://www.anchorterminal.com/compare/github-copilot-cli-vs-muse-code.md)
- [GitHub Copilot CLI vs Sculptor](https://www.anchorterminal.com/compare/github-copilot-cli-vs-sculptor.md)
- [goose vs Muse Code](https://www.anchorterminal.com/compare/goose-vs-muse-code.md)
- [goose vs Sculptor](https://www.anchorterminal.com/compare/goose-vs-sculptor.md)
- [Harness² vs Muse Code](https://www.anchorterminal.com/compare/harness2-vs-muse-code.md)
- [Harness² vs Sculptor](https://www.anchorterminal.com/compare/harness2-vs-sculptor.md)
- [HarnessRouter vs Muse Code](https://www.anchorterminal.com/compare/harnessrouter-vs-muse-code.md)
- [HarnessRouter vs Sculptor](https://www.anchorterminal.com/compare/harnessrouter-vs-sculptor.md)
- [Jules vs Muse Code](https://www.anchorterminal.com/compare/jules-vs-muse-code.md)
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- [Junie CLI vs Muse Code](https://www.anchorterminal.com/compare/junie-vs-muse-code.md)
- [Junie CLI vs Sculptor](https://www.anchorterminal.com/compare/junie-vs-sculptor.md)
- [Kilo Code CLI vs Muse Code](https://www.anchorterminal.com/compare/kilo-code-cli-vs-muse-code.md)
- [Kilo Code CLI vs Sculptor](https://www.anchorterminal.com/compare/kilo-code-cli-vs-sculptor.md)
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- [Kimi Code CLI vs Sculptor](https://www.anchorterminal.com/compare/kimi-code-cli-vs-sculptor.md)
- [Kiro CLI vs Muse Code](https://www.anchorterminal.com/compare/kiro-cli-vs-muse-code.md)
- [Kiro CLI vs Sculptor](https://www.anchorterminal.com/compare/kiro-cli-vs-sculptor.md)
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- [Letta vs Sculptor](https://www.anchorterminal.com/compare/letta-vs-sculptor.md)
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- [mini-swe-agent vs Sculptor](https://www.anchorterminal.com/compare/mini-swe-agent-vs-sculptor.md)
- [MiniMax Code vs Muse Code](https://www.anchorterminal.com/compare/minimax-code-vs-muse-code.md)
- [MiniMax Code vs Sculptor](https://www.anchorterminal.com/compare/minimax-code-vs-sculptor.md)
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- [Mistral Vibe CLI vs Sculptor](https://www.anchorterminal.com/compare/mistral-vibe-cli-vs-sculptor.md)
- [Muse Code vs OpenAI Agents API](https://www.anchorterminal.com/compare/muse-code-vs-openai-agents-api.md)
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- [Muse Code vs OpenMausBot](https://www.anchorterminal.com/compare/muse-code-vs-openmausbot.md)
- [Muse Code vs Orca](https://www.anchorterminal.com/compare/muse-code-vs-orca.md)
- [Muse Code vs Paseo](https://www.anchorterminal.com/compare/muse-code-vs-paseo.md)
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- [Muse Code vs Qwen Code](https://www.anchorterminal.com/compare/muse-code-vs-qwen-code.md)
- [Muse Code vs Mirror CLI](https://www.anchorterminal.com/compare/muse-code-vs-reflection-mirror.md)
- [Muse Code vs Rovo Dev CLI](https://www.anchorterminal.com/compare/muse-code-vs-rovo-dev-cli.md)
- [Muse Code vs T3 Code](https://www.anchorterminal.com/compare/muse-code-vs-t3-code.md)
- [Muse Code vs Traycer](https://www.anchorterminal.com/compare/muse-code-vs-traycer.md)
- [Muse Code vs Unstoppable](https://www.anchorterminal.com/compare/muse-code-vs-unstoppable.md)
- [Muse Code vs Verdent](https://www.anchorterminal.com/compare/muse-code-vs-verdent.md)
- [Muse Code vs Vibe-Trading](https://www.anchorterminal.com/compare/muse-code-vs-vibe-trading.md)
- [Muse Code vs Warp (Warp Agent CLI and the Oz Agent API)](https://www.anchorterminal.com/compare/muse-code-vs-warp.md)
- [OpenAI Agents API vs Sculptor](https://www.anchorterminal.com/compare/openai-agents-api-vs-sculptor.md)
- [OpenAI Codex vs Sculptor](https://www.anchorterminal.com/compare/openai-codex-vs-sculptor.md)
- [OpenCode vs Sculptor](https://www.anchorterminal.com/compare/opencode-vs-sculptor.md)
- [OpenHands vs Sculptor](https://www.anchorterminal.com/compare/openhands-vs-sculptor.md)
- [Orca vs Sculptor](https://www.anchorterminal.com/compare/orca-vs-sculptor.md)
- [Paseo vs Sculptor](https://www.anchorterminal.com/compare/paseo-vs-sculptor.md)
- [Prime Agent vs Sculptor](https://www.anchorterminal.com/compare/prime-agent-vs-sculptor.md)
- [Qoder CLI vs Sculptor](https://www.anchorterminal.com/compare/qoder-cli-vs-sculptor.md)
- [Qwen Code vs Sculptor](https://www.anchorterminal.com/compare/qwen-code-vs-sculptor.md)
- [Mirror CLI vs Sculptor](https://www.anchorterminal.com/compare/reflection-mirror-vs-sculptor.md)
- [Rovo Dev CLI vs Sculptor](https://www.anchorterminal.com/compare/rovo-dev-cli-vs-sculptor.md)
- [Sculptor vs T3 Code](https://www.anchorterminal.com/compare/sculptor-vs-t3-code.md)
- [Sculptor vs Traycer](https://www.anchorterminal.com/compare/sculptor-vs-traycer.md)
- [Sculptor vs Unstoppable](https://www.anchorterminal.com/compare/sculptor-vs-unstoppable.md)
- [Sculptor vs Verdent](https://www.anchorterminal.com/compare/sculptor-vs-verdent.md)
- [Sculptor vs Vibe-Trading](https://www.anchorterminal.com/compare/sculptor-vs-vibe-trading.md)
- [Sculptor vs Warp (Warp Agent CLI and the Oz Agent API)](https://www.anchorterminal.com/compare/sculptor-vs-warp.md)
- [Clawboo vs Muse Code](https://www.anchorterminal.com/compare/clawboo-vs-muse-code.md)
- [Clawboo vs Sculptor](https://www.anchorterminal.com/compare/clawboo-vs-sculptor.md)
- [CLI Manager vs Muse Code](https://www.anchorterminal.com/compare/cli-manager-vs-muse-code.md)
- [CLI Manager vs Sculptor](https://www.anchorterminal.com/compare/cli-manager-vs-sculptor.md)
- [Harness vs Muse Code](https://www.anchorterminal.com/compare/harness-autonomous-vs-muse-code.md)
- [Harness vs Sculptor](https://www.anchorterminal.com/compare/harness-autonomous-vs-sculptor.md)
- [Muse Code vs Paperclip](https://www.anchorterminal.com/compare/muse-code-vs-paperclip.md)
- [Muse Code vs Parallax](https://www.anchorterminal.com/compare/muse-code-vs-parallax-agents.md)
- [OpenMausBot vs Sculptor](https://www.anchorterminal.com/compare/openmausbot-vs-sculptor.md)
- [Paperclip vs Sculptor](https://www.anchorterminal.com/compare/paperclip-vs-sculptor.md)
- [Parallax vs Sculptor](https://www.anchorterminal.com/compare/parallax-agents-vs-sculptor.md)

---

Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp