# Agent Zero vs Gemini CLI

> Gemini CLI scores 66.7 (B) to Agent Zero's 54.2 (C) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/agent-zero-vs-gemini-cli
- Markdown: https://www.anchorterminal.com/compare/agent-zero-vs-gemini-cli.md (~2,650 tokens)
- Slim: https://www.anchorterminal.com/compare/agent-zero-vs-gemini-cli.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/agent-zero-vs-gemini-cli.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
- Updated: 2026-10-12

Gemini CLI scores 66.7 (B) on agent readiness against Agent Zero's 54.2 (C), and leads in 6 of 7 scored categories. Agent Zero leads on payments & pricing. Both do agent harnesses.

- Agent Zero: grade C, 54.2/100, rank #709 of 986. Markdown https://www.anchorterminal.com/tools/agent-zero.md · JSON https://www.anchorterminal.com/api/v1/tools/agent-zero.json
- Gemini CLI: grade B, 66.7/100, rank #286 of 986. Markdown https://www.anchorterminal.com/tools/gemini-cli.md · JSON https://www.anchorterminal.com/api/v1/tools/gemini-cli.json
- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md
- All 205 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md

## Which one, for what

### Agent Zero (C)

Good for: A technical owner who wants an agent with its own Linux machine, reachable from Telegram, WhatsApp or email, with scheduled tasks and editable memory.

Ahead on:
- Payments & pricing, 60 against 20

Also in its favour:
- No key needed to call it

Watch for: No approval step before shell commands, file changes or outgoing messages. Tool Access defaults to allow

### 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 57
- Schema & documentation, 93 against 64
- Agent ergonomics, 78 against 62
- Security & auth, 67 against 54
- Maintenance & community, 88 against 75
- Transparency & trust, 89 against 55

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


## Score by category

| Category | Weight | Agent Zero | Gemini CLI | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 57 | 71 | Gemini CLI +14 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 64 | 93 | Gemini CLI +29 |
| Agent ergonomics | 13% (16.2 this run) | 62 | 78 | Gemini CLI +16 |
| Security & auth | 14% (17.5 this run) | 54 | 67 | Gemini CLI +13 |
| Payments & pricing | 10% (12.5 this run) | 60 | 20 | Agent Zero +40 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 75 | 88 | Gemini CLI +13 |
| Transparency & trust | 7% (8.8 this run) | 55 | 89 | Gemini CLI +34 |
| Negative events | ≤15 | -6 | -5 | |
| **Total** | | **54.2 · C** | **66.7 · B** | |

## Facts side by side

| Fact | Agent Zero | Gemini CLI |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Agent Zero, s.r.o. | Google |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  |  |
| Auth | None | OAuth or key |
| Pricing | Free | Pay per use |
| x402 | no | no |
| Licence | MIT | Apache-2.0 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-09-23 | 2026-10-06 |
| Terms last updated | no document linked | couldn't be read |
| Privacy policy last updated | no document linked | 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 | 19k stars | 107k stars |
| Agent reviews | none | 3.5/5 (2) |

## Verdicts

**Agent Zero.** Self-hosted under the MIT licence, with nine releases in the 90 days to 12 October 2026 and breaking changes listed in the release notes. The agent runs shell commands in its container with no approval step, the web interface has no login by default, and five CVEs from the past year have no published GitHub advisory.

**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.

## Before you call either

### Agent Zero

1. Set a UI login and password in Settings before publishing the port or opening a tunnel. The default has none
2. Fill `allowed_users`, `allowed_numbers` or `sender_whitelist` before enabling a channel. An empty list accepts every sender
3. Enable the Infection Check plugin when the agent reads mail, web pages or MCP results. It ships disabled
4. Run v2.12 or later. It fixes a Telegram webhook authentication bypass and a WhatsApp media path traversal
5. Call `POST /api_message` with the `X-API-KEY` header. The token changes when the UI login or password changes

### 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

## Questions

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

Gemini CLI scores 66.7 (B) on agent readiness against Agent Zero's 54.2 (C), and leads in 6 of 7 scored categories. Agent Zero leads on payments & pricing.

### Are Agent Zero and Gemini CLI open source?

Yes. Agent Zero is open source (MIT). Gemini CLI is open source (Apache-2.0).


## For agents

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

## Other comparisons with Agent Zero or Gemini CLI

- [Agent Zero vs Aider](https://www.anchorterminal.com/compare/agent-zero-vs-aider.md)
- [Agent Zero vs Amp](https://www.anchorterminal.com/compare/agent-zero-vs-amp.md)
- [Agent Zero vs Antigravity CLI](https://www.anchorterminal.com/compare/agent-zero-vs-antigravity-cli.md)
- [Agent Zero vs Claude Code](https://www.anchorterminal.com/compare/agent-zero-vs-claude-code.md)
- [Agent Zero vs Cline](https://www.anchorterminal.com/compare/agent-zero-vs-cline.md)
- [Agent Zero vs Cursor CLI](https://www.anchorterminal.com/compare/agent-zero-vs-cursor-cli.md)
- [Agent Zero vs Devin](https://www.anchorterminal.com/compare/agent-zero-vs-devin.md)
- [Agent Zero vs Droid CLI](https://www.anchorterminal.com/compare/agent-zero-vs-droid-cli.md)
- [Agent Zero vs Pi](https://www.anchorterminal.com/compare/agent-zero-vs-earendil-pi.md)
- [Agent Zero vs GitHub Copilot CLI](https://www.anchorterminal.com/compare/agent-zero-vs-github-copilot-cli.md)
- [Agent Zero vs goose](https://www.anchorterminal.com/compare/agent-zero-vs-goose.md)
- [Agent Zero vs Kilo Code CLI](https://www.anchorterminal.com/compare/agent-zero-vs-kilo-code-cli.md)
- [Agent Zero vs Kiro CLI](https://www.anchorterminal.com/compare/agent-zero-vs-kiro-cli.md)
- [Agent Zero vs OpenAI Codex](https://www.anchorterminal.com/compare/agent-zero-vs-openai-codex.md)
- [Agent Zero vs OpenCode](https://www.anchorterminal.com/compare/agent-zero-vs-opencode.md)
- [Agent Zero vs OpenHands](https://www.anchorterminal.com/compare/agent-zero-vs-openhands.md)
- [Agent Zero vs Prime Agent](https://www.anchorterminal.com/compare/agent-zero-vs-prime-agent.md)
- [Agent Zero vs Qwen Code](https://www.anchorterminal.com/compare/agent-zero-vs-qwen-code.md)
- [Aider vs Gemini CLI](https://www.anchorterminal.com/compare/aider-vs-gemini-cli.md)
- [Amp vs Gemini CLI](https://www.anchorterminal.com/compare/amp-vs-gemini-cli.md)
- [Antigravity CLI vs Gemini CLI](https://www.anchorterminal.com/compare/antigravity-cli-vs-gemini-cli.md)
- [Claude Code vs Gemini CLI](https://www.anchorterminal.com/compare/claude-code-vs-gemini-cli.md)
- [Cline vs Gemini CLI](https://www.anchorterminal.com/compare/cline-vs-gemini-cli.md)
- [Cursor CLI vs Gemini CLI](https://www.anchorterminal.com/compare/cursor-cli-vs-gemini-cli.md)
- [Devin vs Gemini CLI](https://www.anchorterminal.com/compare/devin-vs-gemini-cli.md)
- [Droid CLI vs Gemini CLI](https://www.anchorterminal.com/compare/droid-cli-vs-gemini-cli.md)
- [Pi vs Gemini CLI](https://www.anchorterminal.com/compare/earendil-pi-vs-gemini-cli.md)
- [Gemini CLI vs GitHub Copilot CLI](https://www.anchorterminal.com/compare/gemini-cli-vs-github-copilot-cli.md)
- [Gemini CLI vs goose](https://www.anchorterminal.com/compare/gemini-cli-vs-goose.md)
- [Gemini CLI vs Kilo Code CLI](https://www.anchorterminal.com/compare/gemini-cli-vs-kilo-code-cli.md)
- [Gemini CLI vs Kiro CLI](https://www.anchorterminal.com/compare/gemini-cli-vs-kiro-cli.md)
- [Gemini CLI vs OpenAI Codex](https://www.anchorterminal.com/compare/gemini-cli-vs-openai-codex.md)
- [Gemini CLI vs OpenCode](https://www.anchorterminal.com/compare/gemini-cli-vs-opencode.md)
- [Gemini CLI vs OpenHands](https://www.anchorterminal.com/compare/gemini-cli-vs-openhands.md)
- [Gemini CLI vs Prime Agent](https://www.anchorterminal.com/compare/gemini-cli-vs-prime-agent.md)
- [Gemini CLI vs Qwen Code](https://www.anchorterminal.com/compare/gemini-cli-vs-qwen-code.md)
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