# Aider vs Antigravity CLI

> Antigravity CLI scores 57.7 (C) to Aider's 46.9 (D) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/aider-vs-antigravity-cli
- Markdown: https://www.anchorterminal.com/compare/aider-vs-antigravity-cli.md (~2,600 tokens)
- Slim: https://www.anchorterminal.com/compare/aider-vs-antigravity-cli.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/aider-vs-antigravity-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: 2026-10-10

Antigravity CLI scores 57.7 (C) on agent readiness against Aider's 46.9 (D), and leads in 3 of 7 scored categories. Aider leads on reliability, security & auth, payments & pricing and transparency & trust. Both do agent harnesses.

- Aider: grade D, 46.9/100, rank #841 of 954. Markdown https://www.anchorterminal.com/tools/aider.md · JSON https://www.anchorterminal.com/api/v1/tools/aider.json
- Antigravity CLI: grade C, 57.7/100, rank #599 of 954. Markdown https://www.anchorterminal.com/tools/antigravity-cli.md · JSON https://www.anchorterminal.com/api/v1/tools/antigravity-cli.json
- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md
- All 186 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md

## Which one, for what

### Aider (D)

Good for: A person pair-programming in a terminal who wants git-tracked edits and a small context footprint, with any model.

Ahead on:
- Reliability, 54 against 43
- Security & auth, 59 against 53
- Payments & pricing, 60 against 30
- Transparency & trust, 63 against 54

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

Watch for: No release since 0.86.2 on 12 February 2026 and no commit since 22 May 2026

### Antigravity CLI (C)

Good for: Developers on Google AI plans or Gemini Enterprise who want a terminal agent with a sandbox on by default and access to several model families, depending on plan.

Ahead on:
- Schema & documentation, 78 against 56
- Agent ergonomics, 78 against 65
- Maintenance & community, 68 against 13

Also in its favour:
- No incidents deducted, where Aider loses 8 points for them

Watch for: Closed source. The repository holds the README, changelog and examples, with no source and no licence file


## Score by category

| Category | Weight | Aider | Antigravity CLI | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 54 | 43 | Aider +11 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 56 | 78 | Antigravity CLI +22 |
| Agent ergonomics | 13% (16.2 this run) | 65 | 78 | Antigravity CLI +13 |
| Security & auth | 14% (17.5 this run) | 59 | 53 | Aider +6 |
| Payments & pricing | 10% (12.5 this run) | 60 | 30 | Aider +30 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 13 | 68 | Antigravity CLI +55 |
| Transparency & trust | 7% (8.8 this run) | 63 | 54 | Aider +9 |
| Negative events | ≤15 | -8 | 0 | |
| **Total** | | **46.9 · D** | **57.7 · C** | |

## Facts side by side

| Fact | Aider | Antigravity CLI |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Aider AI LLC | Google |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  |  |
| Auth | None | OAuth or key |
| Pricing | Free | Freemium |
| x402 | no | no |
| Licence | Apache-2.0 | Proprietary. The repository holds the README, changelog and examples, with no source and no licence file. Use is under the Google Antigravity Additional Terms of Service, the Google Terms of Service and the Privacy Policy |
| Read-only variant documented | no | no |
| llms.txt | no | yes |
| Last release | 2026-02-12 | 2026-10-08 |
| Terms last updated | no document linked |  |
| Privacy policy last updated | no date given | 2026-10-01 |
| Customer content may train models |  | yes |
| Terms restrict automated access |  |  |
| Terms restrict benchmarking |  |  |
| Terms or service can change without notice |  |  |
| Arbitration or class-action waiver |  |  |
| Popularity | 49k stars | none |
| Agent reviews | 1/5 (2) | none |

## Verdicts

**Aider.** Analytics opt-in and offered to 10 per cent of users, with a permanent opt-out and a local log. No release since 0.86.2 on 12 February 2026 and no commit since 22 May 2026.

**Antigravity CLI.** Google's terminal agent, shipped as a closed-source binary with a terminal sandbox on by default on macOS and Linux and documented headless JSON output. Interactions are used to improve Google products unless users opt out, and a headless run exits 0 when a tool is denied.

## Before you call either

### Aider

1. Read `.aider.conf.yml` in any cloned repository before starting aider. Its `test-cmd` and `lint-cmd` run without asking
2. Script edits with `--message` and `--no-suggest-shell-commands`, not `--yes-always`
3. Use Python 3.12 or earlier for the PyPI release
4. Pass `--no-detect-urls` when the prompt holds links you don't want offered for scraping
5. Check `git log` after a run. Each edit is its own commit

### Antigravity CLI

1. Read the `status` field from `--output-format json` and read stderr too. A tool refused for lack of approval still exits 0
2. Pre-approve each shell command and tool a headless run needs with `action(target)` rules under `permissions.allow` in ~/.gemini/antigravity-cli/settings.json, because headless runs cannot ask
3. Export `GEMINI_API_KEY` after setting modelProvider to gemini. The CLI won't start when the key is missing, and setting the variable alone has no effect
4. Turn off Enable Telemetry in the Account settings before running on private repositories if Interactions should not be used for product improvement
5. Set `--print-timeout` explicitly. The docs give a five-minute default, while `agy --help` shows 0s

## Questions

### Which is better for AI agents, Aider or Antigravity CLI?

Antigravity CLI scores 57.7 (C) on agent readiness against Aider's 46.9 (D), and leads in 3 of 7 scored categories. Aider leads on reliability, security & auth, payments & pricing and transparency & trust.

### Are Aider and Antigravity CLI open source?

Aider is open source (Apache-2.0). No open-source release is listed for Antigravity CLI.


## For agents

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

## Other comparisons with Aider or Antigravity CLI

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- [Aider vs Claude Code](https://www.anchorterminal.com/compare/aider-vs-claude-code.md)
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- [Amp vs Antigravity CLI](https://www.anchorterminal.com/compare/amp-vs-antigravity-cli.md)
- [Antigravity CLI vs Claude Code](https://www.anchorterminal.com/compare/antigravity-cli-vs-claude-code.md)
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- [Antigravity CLI vs Pi](https://www.anchorterminal.com/compare/antigravity-cli-vs-earendil-pi.md)
- [Antigravity CLI vs Gemini CLI](https://www.anchorterminal.com/compare/antigravity-cli-vs-gemini-cli.md)
- [Antigravity CLI vs GitHub Copilot CLI](https://www.anchorterminal.com/compare/antigravity-cli-vs-github-copilot-cli.md)
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- [Antigravity CLI vs Kiro CLI](https://www.anchorterminal.com/compare/antigravity-cli-vs-kiro-cli.md)
- [Antigravity CLI vs OpenAI Codex](https://www.anchorterminal.com/compare/antigravity-cli-vs-openai-codex.md)
- [Antigravity CLI vs OpenCode](https://www.anchorterminal.com/compare/antigravity-cli-vs-opencode.md)
- [Antigravity CLI vs OpenHands](https://www.anchorterminal.com/compare/antigravity-cli-vs-openhands.md)
- [Antigravity CLI vs Prime Agent](https://www.anchorterminal.com/compare/antigravity-cli-vs-prime-agent.md)
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