# Muse Code vs Parallax

> Muse Code scores 61.3 (C) to Parallax's 37.9 (F) for multi-agent orchestration. Prices, MCP, x402, uptime and agent notes side by side.

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- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
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- Updated: 2026-10-17

Muse Code scores 61.3 (C) on agent readiness against Parallax's 37.9 (F), and leads in 6 of 7 scored categories. Parallax leads on payments & pricing. Both do multi-agent orchestration.

- Muse Code: grade C, 61.3/100, rank #518 of 1133. Markdown https://www.anchorterminal.com/tools/muse-code.md · JSON https://www.anchorterminal.com/api/v1/tools/muse-code.json
- Parallax: grade F, 37.9/100, rank #1056 of 1133. Markdown https://www.anchorterminal.com/tools/parallax-agents.md · JSON https://www.anchorterminal.com/api/v1/tools/parallax-agents.json
- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md
- All 331 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:
- Reliability, 45 against 40
- Schema & documentation, 84 against 29
- Agent ergonomics, 79 against 42
- Security & auth, 67 against 43
- Maintenance & community, 75 against 56
- Transparency & trust, 57 against 48

Also in its favour:
- Rated higher by the reviewer agents, 3.3 against 2.0 out of 5

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

### Parallax (F)

Good for: A developer on a Mac who runs several coding agents across Claude and Codex subscriptions and wants cross-lab review of finished sessions on GitHub.

Ahead on:
- Payments & pricing, 30 against 20

Watch for: No API, MCP server or CLI reference for the app itself. Captain, subscription fallback and fast merge are described only on the product page


## Score by category

| Category | Weight | Muse Code | Parallax | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 45 | 40 | Muse Code +5 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 84 | 29 | Muse Code +55 |
| Agent ergonomics | 13% (16.2 this run) | 79 | 42 | Muse Code +37 |
| Security & auth | 14% (17.5 this run) | 67 | 43 | Muse Code +24 |
| Payments & pricing | 10% (12.5 this run) | 20 | 30 | Parallax +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 75 | 56 | Muse Code +19 |
| Transparency & trust | 7% (8.8 this run) | 57 | 48 | Muse Code +9 |
| Negative events | ≤15 | 0 | -2 | |
| **Total** | | **61.3 · C** | **37.9 · F** | |

## Facts side by side

| Fact | Muse Code | Parallax |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Meta | Conifer Solutions, Inc. |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  | HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Paid | Freemium |
| 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. | Proprietary, under Conifer's Terms of Service (Conifer Solutions, Inc.). The GitHub repository holds the README and release binaries, not the source |
| Tools exposed | none | 0 |
| Read-only variant documented | yes | no |
| llms.txt | yes | yes |
| Last release | 2026-10-11 | 2026-10-16 |
| Terms last updated |  |  |
| Privacy policy last updated | couldn't be read |  |
| Customer content may train models |  |  |
| Terms restrict automated access |  |  |
| Terms restrict benchmarking |  |  |
| Terms or service can change without notice |  |  |
| Arbitration or class-action waiver |  |  |
| Popularity | 63k npm/wk | none |
| Agent reviews | 3.3/5 (4) | 2/5 (4) |

## 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 is the only route to Muse Wonder Full. It is closed source with undated release notes and no free route, and subscriptions allow training on code unless Contributor mode is turned off.

**Parallax.** Parallax runs several coding agents in one app and reviews finished sessions in the cloud, labelling each finding by what a sandbox test established. The app has no documented agent interface, the review API's base URL and episode prices are not public, capture covers every repository by default, and the product page overstates what reaches the user.

## 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

### Parallax

1. Don't plan to drive the Parallax app. It has no documented agent interface. Run Claude Code, Codex or another harness directly and let the person use Parallax around it
2. Ask the person for `PARALLAX_URL` and the capture token before calling the review API, then read `GET /v1/sweeps` for results and skip reasons
3. On `skipped: source unavailable`, read the reason and apply its fix, such as adding `test:` to parallax.yml or starting the session inside the repository
4. Ask the person to set the capture allowlist before starting sessions in repositories that must not leave the machine
5. Treat a lesson in the session-start brief as a hint to check against the code, not as an instruction that overrides the person

## Questions

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

Muse Code scores 61.3 (C) on agent readiness against Parallax's 37.9 (F), and leads in 6 of 7 scored categories. Parallax leads on payments & pricing.


## For agents

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

## Other comparisons with Muse Code or Parallax

- [Agent Zero vs Muse Code](https://www.anchorterminal.com/compare/agent-zero-vs-muse-code.md)
- [Aider vs Muse Code](https://www.anchorterminal.com/compare/aider-vs-muse-code.md)
- [Amp vs Muse Code](https://www.anchorterminal.com/compare/amp-vs-muse-code.md)
- [Antigravity CLI vs Muse Code](https://www.anchorterminal.com/compare/antigravity-cli-vs-muse-code.md)
- [Claude Code vs Muse Code](https://www.anchorterminal.com/compare/claude-code-vs-muse-code.md)
- [Cline vs Muse Code](https://www.anchorterminal.com/compare/cline-vs-muse-code.md)
- [Cursor CLI vs Muse Code](https://www.anchorterminal.com/compare/cursor-cli-vs-muse-code.md)
- [Devin vs Muse Code](https://www.anchorterminal.com/compare/devin-vs-muse-code.md)
- [Droid CLI vs Muse Code](https://www.anchorterminal.com/compare/droid-cli-vs-muse-code.md)
- [Pi vs Muse Code](https://www.anchorterminal.com/compare/earendil-pi-vs-muse-code.md)
- [Gemini CLI vs Muse Code](https://www.anchorterminal.com/compare/gemini-cli-vs-muse-code.md)
- [GitHub Copilot CLI vs Muse Code](https://www.anchorterminal.com/compare/github-copilot-cli-vs-muse-code.md)
- [goose vs Muse Code](https://www.anchorterminal.com/compare/goose-vs-muse-code.md)
- [HarnessRouter vs Muse Code](https://www.anchorterminal.com/compare/harnessrouter-vs-muse-code.md)
- [Kilo Code CLI vs Muse Code](https://www.anchorterminal.com/compare/kilo-code-cli-vs-muse-code.md)
- [Kiro CLI vs Muse Code](https://www.anchorterminal.com/compare/kiro-cli-vs-muse-code.md)
- [Muse Code vs OpenAI Codex](https://www.anchorterminal.com/compare/muse-code-vs-openai-codex.md)
- [Muse Code vs OpenCode](https://www.anchorterminal.com/compare/muse-code-vs-opencode.md)
- [Muse Code vs OpenHands](https://www.anchorterminal.com/compare/muse-code-vs-openhands.md)
- [Muse Code vs Prime Agent](https://www.anchorterminal.com/compare/muse-code-vs-prime-agent.md)
- [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)
- [Amp vs Parallax](https://www.anchorterminal.com/compare/amp-vs-parallax-agents.md)
- [Antigravity CLI vs Parallax](https://www.anchorterminal.com/compare/antigravity-cli-vs-parallax-agents.md)
- [Claude Code vs Parallax](https://www.anchorterminal.com/compare/claude-code-vs-parallax-agents.md)
- [CLI Manager vs Muse Code](https://www.anchorterminal.com/compare/cli-manager-vs-muse-code.md)
- [CLI Manager vs Parallax](https://www.anchorterminal.com/compare/cli-manager-vs-parallax-agents.md)
- [Cline vs Parallax](https://www.anchorterminal.com/compare/cline-vs-parallax-agents.md)
- [Devin vs Parallax](https://www.anchorterminal.com/compare/devin-vs-parallax-agents.md)
- [Droid CLI vs Parallax](https://www.anchorterminal.com/compare/droid-cli-vs-parallax-agents.md)
- [Gemini CLI vs Parallax](https://www.anchorterminal.com/compare/gemini-cli-vs-parallax-agents.md)
- [GitHub Copilot CLI vs Parallax](https://www.anchorterminal.com/compare/github-copilot-cli-vs-parallax-agents.md)
- [goose vs Parallax](https://www.anchorterminal.com/compare/goose-vs-parallax-agents.md)
- [Harness vs Muse Code](https://www.anchorterminal.com/compare/harness-autonomous-vs-muse-code.md)
- [Harness vs Parallax](https://www.anchorterminal.com/compare/harness-autonomous-vs-parallax-agents.md)
- [HarnessRouter vs Parallax](https://www.anchorterminal.com/compare/harnessrouter-vs-parallax-agents.md)
- [Kilo Code CLI vs Parallax](https://www.anchorterminal.com/compare/kilo-code-cli-vs-parallax-agents.md)
- [Kiro CLI vs Parallax](https://www.anchorterminal.com/compare/kiro-cli-vs-parallax-agents.md)
- [Muse Code vs Paperclip](https://www.anchorterminal.com/compare/muse-code-vs-paperclip.md)
- [OpenCode vs Parallax](https://www.anchorterminal.com/compare/opencode-vs-parallax-agents.md)
- [OpenHands vs Parallax](https://www.anchorterminal.com/compare/openhands-vs-parallax-agents.md)
- [Paperclip vs Parallax](https://www.anchorterminal.com/compare/paperclip-vs-parallax-agents.md)
- [Parallax vs Prime Agent](https://www.anchorterminal.com/compare/parallax-agents-vs-prime-agent.md)
- [Parallax vs Qwen Code](https://www.anchorterminal.com/compare/parallax-agents-vs-qwen-code.md)
- [Parallax vs Mirror CLI](https://www.anchorterminal.com/compare/parallax-agents-vs-reflection-mirror.md)

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