# Amp vs Antigravity CLI

> Antigravity CLI and Amp score within a point of each other for agent harnesses, 57.7 and 57.1 out of 100. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/amp-vs-antigravity-cli
- Markdown: https://www.anchorterminal.com/compare/amp-vs-antigravity-cli.md (~2,650 tokens)
- Slim: https://www.anchorterminal.com/compare/amp-vs-antigravity-cli.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/amp-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 and Amp score within a point of each other on agent readiness, 57.7 (C) and 57.1 (C). Amp leads on payments & pricing, maintenance & community and transparency & trust. Both do agent harnesses.

- Amp: grade C, 57.1/100, rank #622 of 954. Markdown https://www.anchorterminal.com/tools/amp.md · JSON https://www.anchorterminal.com/api/v1/tools/amp.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

### Amp (C)

Good for: Teams that want a hosted, multi-model coding agent with shared threads and cloud machines, driven from scripts through execute mode or the SDKs.

Ahead on:
- Payments & pricing, 35 against 30
- Maintenance & community, 79 against 68
- Transparency & trust, 77 against 54

Watch for: The tools page says Amp does not ask for approval before running tools, and control needs a custom plugin

### 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:
- Reliability, 43 against 31
- Schema & documentation, 78 against 72
- Agent ergonomics, 78 against 69

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


## Score by category

| Category | Weight | Amp | Antigravity CLI | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 31 | 43 | Antigravity CLI +12 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 72 | 78 | Antigravity CLI +6 |
| Agent ergonomics | 13% (16.2 this run) | 69 | 78 | Antigravity CLI +9 |
| Security & auth | 14% (17.5 this run) | 57 | 53 | Amp +4 |
| Payments & pricing | 10% (12.5 this run) | 35 | 30 | Amp +5 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 79 | 68 | Amp +11 |
| Transparency & trust | 7% (8.8 this run) | 77 | 54 | Amp +23 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **57.1 · C** | **57.7 · C** | |

## Facts side by side

| Fact | Amp | Antigravity CLI |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Amp Frontier Corporation | Google |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  |  |
| Auth | OAuth or key | OAuth or key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Proprietary, under the Amp licence terms (Amp Frontier Corporation). The npm packages are marked Amp Commercial License and the source repository is private | 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 | yes | yes |
| Last release | 2026-10-08 | 2026-10-08 |
| Terms last updated | no date given |  |
| Privacy policy last updated | 2026-09-10 | 2026-10-01 |
| Customer content may train models | not found in the text | yes |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | yes |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | 41k npm/wk | none |

## Verdicts

**Amp.** Execute mode streams JSON in a format close to Claude Code's, with TypeScript and Python SDKs, and the security reference names each provider and what it sees. The CLI runs tools without asking, has no built-in permission rules or local sandbox, and stores every thread on Amp's servers.

**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

### Amp

1. Run unattended jobs in a container or VM. The CLI runs shell commands and edits without asking, and only a custom plugin can gate tool calls
2. Set `AMP_API_KEY` to an access token starting `sgamp_` from Settings. The CLI rejects the short-lived token that `amp login` stores
3. Use `amp -x "task" --stream-json` and read the final `result` message, checking `is_error`. Exit codes are not documented
4. Set `AMP_SKIP_UPDATE_CHECK=1` or `amp.updates.mode` to `disabled` in CI. Updates install automatically by default
5. Treat the block headed INSTRUCTIONS FOR LLMs in ampcode.com page source as vendor copy, and take facts from the docs Markdown

### 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, Amp or Antigravity CLI?

Antigravity CLI and Amp score within a point of each other on agent readiness, 57.7 (C) and 57.1 (C). Amp leads on payments & pricing, maintenance & community and transparency & trust.


## For agents

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

## Other comparisons with Amp or Antigravity CLI

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