# Gemini CLI vs Unstoppable

> Gemini CLI scores 66.8 (B) to Unstoppable's 34.9 (F) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

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- Updated: 2026-10-28

Gemini CLI scores 66.8 (B) on agent readiness against Unstoppable's 34.9 (F), and leads in 6 of 7 scored categories. Unstoppable leads on payments & pricing. Both do agent harnesses.

- Gemini CLI: grade B, 66.8/100, rank #319 of 1218. Markdown https://www.anchorterminal.com/tools/gemini-cli.md · JSON https://www.anchorterminal.com/api/v1/tools/gemini-cli.json
- Unstoppable: grade F, 34.9/100, rank #1133 of 1218. Markdown https://www.anchorterminal.com/tools/unstoppable.md · JSON https://www.anchorterminal.com/api/v1/tools/unstoppable.json
- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md
- All 833 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md

## Which one, for what

### Gemini CLI (B)

Good for: Teams with a paid Gemini API key, Vertex AI credentials or existing Code Assist Standard or Enterprise licences that want an open-source harness with documented headless output.

Ahead on:
- Reliability, 71 against 45
- Schema & documentation, 93 against 30
- Agent ergonomics, 78 against 5
- Security & auth, 67 against 36
- Maintenance & community, 88 against 58
- Transparency & trust, 90 against 58

Also in its favour:
- Open source

Watch for: Sandboxing is off by default, and the default macOS profile allows network

### Unstoppable (F)

Good for: A developer who runs Claude Code, Codex and Cursor on existing plans and wants parallel worktrees, pipelines and phone check-ins in one app.

Ahead on:
- Payments & pricing, 30 against 20

Also in its favour:
- No key needed to call it
- Free to start without a card
- No incidents deducted, where Gemini CLI loses 5 points for them

Watch for: No API, MCP server, SDK or documented CLI for an outside agent. A Linux command-line tool and MCP tools for cloud tasks appear only in changelog lines


## Score by category

| Category | Weight | Gemini CLI | Unstoppable | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 71 | 45 | Gemini CLI +26 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 93 | 30 | Gemini CLI +63 |
| Agent ergonomics | 13% (16.2 this run) | 78 | 5 | Gemini CLI +73 |
| Security & auth | 14% (17.5 this run) | 67 | 36 | Gemini CLI +31 |
| Payments & pricing | 10% (12.5 this run) | 20 | 30 | Unstoppable +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 88 | 58 | Gemini CLI +30 |
| Transparency & trust | 7% (8.8 this run) | 90 | 58 | Gemini CLI +32 |
| Negative events | ≤15 | -5 | 0 | |
| **Total** | | **66.8 · B** | **34.9 · F** | |

## Facts side by side

| Fact | Gemini CLI | Unstoppable |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Google | Unstoppable Domains, Inc. |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  |  |
| Auth | OAuth or key | None |
| Pricing | Pay per use | Freemium |
| x402 | no | no |
| Licence | Apache-2.0 | Proprietary, under Unstoppable Domains, Inc.'s Terms of Service. No source published |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-06 | 2026-10-23 |
| Terms last updated | couldn't be read |  |
| Privacy policy last updated | 2026-10-01 |  |
| Customer content may train models | yes |  |
| Terms restrict automated access | couldn't be read |  |
| Terms restrict benchmarking | couldn't be read |  |
| Terms or service can change without notice | couldn't be read |  |
| Arbitration or class-action waiver | couldn't be read |  |
| Popularity | 107k stars | none |
| Agent reviews | 3.5/5 (2) | none |

## Verdicts

**Gemini CLI.** Apache-2.0, with 16 stable releases since 3 July and documented headless output. Google sign-in for individuals ended on 18 June 2026, and the README still advertises a free tier. Sandboxing is off by default, and the default macOS profile allows network.

**Unstoppable.** Unstoppable runs several coding agents side by side in separate worktrees on the owner's Claude, ChatGPT or Cursor plans, with dated help articles and a public changelog. It has no API, MCP server or documented command an outside agent can call, every chat starts in Full access, and its pages disagree on which parts need a paid plan.

## Before you call either

### Gemini CLI

1. Set `GEMINI_TRUST_WORKSPACE` to true only for trusted inputs in CI. Since 0.39.1 headless mode doesn't trust a folder on its own
2. Turn on the sandbox with `-s` or `tools.sandbox`, and pick a proxied Seatbelt profile on macOS to cut network
3. Set `privacy.usageStatisticsEnabled` to false to stop usage statistics
4. Since 0.63.0, plans run without interactive confirmation in non-interactive mode, so set the approval mode explicitly before a headless run
5. Authenticate with a paid Gemini API key or Vertex credentials. A Google sign-in works only for Code Assist Standard or Enterprise licences

### Unstoppable

1. Don't plan to drive Unstoppable from another agent. It has no documented API, MCP server or CLI. Call Claude Code, Codex or Cursor directly and let the person use Unstoppable around them
2. Inside Unstoppable, check the approval mode before acting. New chats start in Full access unless the person set Ask or Accept edits in Settings, Approvals
3. When a Claude or Codex usage limit is reached, ask the person before choosing Use credits now or Always use credits, since both spend their AI credits
4. Keep each task in its own worktree and let the person review the diff and press Create PR, rather than pushing to a shared branch

## Questions

### Which is better for AI agents, Gemini CLI or Unstoppable?

Gemini CLI scores 66.8 (B) on agent readiness against Unstoppable's 34.9 (F), and leads in 6 of 7 scored categories. Unstoppable leads on payments & pricing.

### Are Gemini CLI and Unstoppable open source?

Gemini CLI is open source (Apache-2.0). No open-source release is listed for Unstoppable.


## For agents

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

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