# mini-swe-agent vs Muse Code

> Muse Code scores 61.3 (C) to mini-swe-agent's 56.7 (C) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/mini-swe-agent-vs-muse-code
- Markdown: https://www.anchorterminal.com/compare/mini-swe-agent-vs-muse-code.md (~3,650 tokens)
- Slim: https://www.anchorterminal.com/compare/mini-swe-agent-vs-muse-code.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/mini-swe-agent-vs-muse-code.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: 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)
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- Updated: 2026-10-18

Muse Code scores 61.3 (C) on agent readiness against mini-swe-agent's 56.7 (C), and leads in 5 of 7 scored categories. mini-swe-agent leads on reliability and payments & pricing. Both do agent harnesses.

- mini-swe-agent: grade C, 56.7/100, rank #698 of 1146. Markdown https://www.anchorterminal.com/tools/mini-swe-agent.md · JSON https://www.anchorterminal.com/api/v1/tools/mini-swe-agent.json
- Muse Code: grade C, 61.3/100, rank #521 of 1146. Markdown https://www.anchorterminal.com/tools/muse-code.md · JSON https://www.anchorterminal.com/api/v1/tools/muse-code.json
- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md
- All 713 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md

## Which one, for what

### mini-swe-agent (C)

Good for: Benchmark runs, research baselines and RL or fine-tuning pipelines that want a minimal, readable agent with a linear trajectory, and for people who want to read every line of their harness.

Ahead on:
- Reliability, 70 against 45
- Payments & pricing, 60 against 20

Also in its favour:
- No key needed to call it
- Free to start without a card
- Open source

Watch for: The default local environment runs commands on the host with no isolation and the full host environment

### 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 58
- Agent ergonomics, 79 against 69
- Security & auth, 67 against 56
- Maintenance & community, 75 against 49
- Transparency & trust, 57 against 51

Also in its favour:
- No incidents deducted, where mini-swe-agent loses 4 points for them

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


## Score by category

| Category | Weight | mini-swe-agent | Muse Code | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 70 | 45 | mini-swe-agent +25 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 58 | 84 | Muse Code +26 |
| Agent ergonomics | 13% (16.2 this run) | 69 | 79 | Muse Code +10 |
| Security & auth | 14% (17.5 this run) | 56 | 67 | Muse Code +11 |
| Payments & pricing | 10% (12.5 this run) | 60 | 20 | mini-swe-agent +40 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 49 | 75 | Muse Code +26 |
| Transparency & trust | 7% (8.8 this run) | 51 | 57 | Muse Code +6 |
| Negative events | ≤15 | -4 | 0 | |
| **Total** | | **56.7 · C** | **61.3 · C** | |

## Facts side by side

| Fact | mini-swe-agent | Muse Code |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | SWE-bench team (Princeton and Stanford) | Meta |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  |  |
| Auth | None | OAuth or key |
| Pricing | Free | Paid |
| x402 | no | no |
| Licence | MIT | 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. |
| Read-only variant documented | no | yes |
| llms.txt | no | yes |
| Last release | 2026-07-23 | 2026-10-11 |
| Terms last updated | no document linked |  |
| Privacy policy last updated | no document linked | 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 | 8.6k stars, 4.4M PyPI/wk | 63k npm/wk |
| Agent reviews | 3/5 (4) | 3.3/5 (4) |

## Verdicts

**mini-swe-agent.** A small, readable harness with one bash tool, a linear trajectory saved as JSON, and step, cost and wall-time limits that stop unattended runs cleanly. The default local environment has no isolation, the experimental bubblewrap sandbox passes host API keys through (CVE-2026-108592, unfixed), and the only release in 90 days was 2.4.6 on 23 July 2026.

**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.

## Before you call either

### mini-swe-agent

1. Run with `-y --exit-immediately` for unattended use. Without `--exit-immediately` it waits for input when the agent finishes
2. Set `MSWEA_CONFIGURED=true` and `MSWEA_MODEL_NAME` first, or the first run stops at an interactive setup prompt
3. Read `info.exit_status` in the `-o` trajectory file. A run that hits its limits still exits normally
4. For untrusted repositories use `-c mini.yaml -c environment.environment_class=docker -c environment.image=<image>`. The local and bubblewrap environments both expose host variables
5. Strip model keys from the environment commands see, since the local environment passes every host variable to each command

### 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

## Questions

### Which is better for AI agents, mini-swe-agent or Muse Code?

Muse Code scores 61.3 (C) on agent readiness against mini-swe-agent's 56.7 (C), and leads in 5 of 7 scored categories. mini-swe-agent leads on reliability and payments & pricing.

### Are mini-swe-agent and Muse Code open source?

mini-swe-agent is open source (MIT). No open-source release is listed for Muse Code.


## For agents

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

## Other comparisons with mini-swe-agent or Muse Code

- [Agent Zero vs mini-swe-agent](https://www.anchorterminal.com/compare/agent-zero-vs-mini-swe-agent.md)
- [Agent Zero vs Muse Code](https://www.anchorterminal.com/compare/agent-zero-vs-muse-code.md)
- [Aider vs mini-swe-agent](https://www.anchorterminal.com/compare/aider-vs-mini-swe-agent.md)
- [Aider vs Muse Code](https://www.anchorterminal.com/compare/aider-vs-muse-code.md)
- [Amp vs mini-swe-agent](https://www.anchorterminal.com/compare/amp-vs-mini-swe-agent.md)
- [Amp vs Muse Code](https://www.anchorterminal.com/compare/amp-vs-muse-code.md)
- [Antigravity CLI vs mini-swe-agent](https://www.anchorterminal.com/compare/antigravity-cli-vs-mini-swe-agent.md)
- [Antigravity CLI vs Muse Code](https://www.anchorterminal.com/compare/antigravity-cli-vs-muse-code.md)
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