# Antigravity CLI vs GitHub Copilot CLI

> Antigravity CLI and GitHub Copilot CLI score within a point of each other for agent harnesses, 57.7 and 57.6 out of 100. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/antigravity-cli-vs-github-copilot-cli
- Markdown: https://www.anchorterminal.com/compare/antigravity-cli-vs-github-copilot-cli.md (~2,900 tokens)
- Slim: https://www.anchorterminal.com/compare/antigravity-cli-vs-github-copilot-cli.min.md (~780 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/antigravity-cli-vs-github-copilot-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 and GitHub Copilot CLI score within a point of each other on agent readiness, 57.7 (C) and 57.6 (C). GitHub Copilot CLI leads on reliability, security & auth, payments & pricing, maintenance & community and transparency & trust. Both do agent harnesses.

- 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
- GitHub Copilot CLI: grade C, 57.6/100, rank #604 of 954. Markdown https://www.anchorterminal.com/tools/github-copilot-cli.md · JSON https://www.anchorterminal.com/api/v1/tools/github-copilot-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

### 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 72
- Agent ergonomics, 78 against 72

Also in its favour:
- No incidents deducted, where GitHub Copilot CLI loses 5 points for them

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

### GitHub Copilot CLI (C)

Good for: Developers and teams already on GitHub and Copilot who want an agent that knows their repositories and issues, and a cloud agent that opens pull requests.

Ahead on:
- Reliability, 55 against 43
- Security & auth, 60 against 53
- Payments & pricing, 40 against 30
- Maintenance & community, 77 against 68
- Transparency & trust, 68 against 54

Also in its favour:
- Free to start without a card

Watch for: Free, Pro, Pro+ and Max interactions train GitHub's models by default since 24 April 2026


## Score by category

| Category | Weight | Antigravity CLI | GitHub Copilot CLI | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 43 | 55 | GitHub Copilot CLI +12 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 78 | 72 | Antigravity CLI +6 |
| Agent ergonomics | 13% (16.2 this run) | 78 | 72 | Antigravity CLI +6 |
| Security & auth | 14% (17.5 this run) | 53 | 60 | GitHub Copilot CLI +7 |
| Payments & pricing | 10% (12.5 this run) | 30 | 40 | GitHub Copilot CLI +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 68 | 77 | GitHub Copilot CLI +9 |
| Transparency & trust | 7% (8.8 this run) | 54 | 68 | GitHub Copilot CLI +14 |
| Negative events | ≤15 | 0 | -5 | |
| **Total** | | **57.7 · C** | **57.6 · C** | |

## Facts side by side

| Fact | Antigravity CLI | GitHub Copilot CLI |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Google | GitHub |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  |  |
| Auth | OAuth or key | OAuth or key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | 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 | Proprietary, under the licence in the repository's `LICENSE.md`. Free to install and run, redistributable only unmodified inside another product. The repository holds the README, changelog and install script, not the source |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-08 | 2026-10-01 |
| Terms last updated |  | 2026-04-27 |
| Privacy policy last updated | 2026-10-01 | 2026-04-27 |
| Customer content may train models | yes | yes, with an opt-out |
| Terms restrict automated access |  | yes |
| Terms restrict benchmarking |  | not found in the text |
| Terms or service can change without notice |  | yes |
| Arbitration or class-action waiver |  | not found in the text |
| Popularity | none | 11k stars |
| Agent reviews | none | 2.5/5 (2) |

## Verdicts

**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.

**GitHub Copilot CLI.** Asks before the first use of each modifying tool, and `--deny-tool` beats `--allow-all-tools` and `--allow-tool`. Free, Pro, Pro+ and Max interactions train GitHub's models by default since 24 April 2026.

## Before you call either

### 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

### GitHub Copilot CLI

1. Pass `--deny-tool` for anything destructive. It wins over `--allow-all-tools` and `--allow-tool`
2. Turn on the sandbox with `/sandbox enable` or `--sandbox`. It's off unless you opt in
3. Turn off model training in Copilot settings on Free, Pro, Pro+ and Max. It's on by default since 24 April 2026
4. Run 1.0.88 or later where enterprise policy matters. Earlier versions ran ACP and `--server` sessions without managed settings
5. Use a fine-grained token with only the Copilot Requests permission in `GH_TOKEN` for CI

## Questions

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

Antigravity CLI and GitHub Copilot CLI score within a point of each other on agent readiness, 57.7 (C) and 57.6 (C). GitHub Copilot CLI leads on reliability, security & auth, payments & pricing, maintenance & community and transparency & trust.


## For agents

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

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