# Antigravity CLI vs Devin

> Antigravity CLI scores 57.7 (C) to Devin's 55.7 (C) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/antigravity-cli-vs-devin
- Markdown: https://www.anchorterminal.com/compare/antigravity-cli-vs-devin.md (~2,700 tokens)
- Slim: https://www.anchorterminal.com/compare/antigravity-cli-vs-devin.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/antigravity-cli-vs-devin.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 Devin's 55.7 (C), and leads in 4 of 7 scored categories. Devin leads on security & auth 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
- Devin: grade C, 55.7/100, rank #653 of 954. Markdown https://www.anchorterminal.com/tools/devin.md · JSON https://www.anchorterminal.com/api/v1/tools/devin.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:
- Reliability, 43 against 30
- Agent ergonomics, 78 against 62
- Payments & pricing, 30 against 20
- Maintenance & community, 68 against 63

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

### Devin (C)

Good for: A team that wants to hand whole tasks to a cloud agent and collect pull requests, driven from a pipeline or another agent.

Ahead on:
- Security & auth, 72 against 53
- Transparency & trust, 69 against 54

Also in its favour:
- A hosted endpoint, with nothing to install

Watch for: www.devinstatus.com lists three critical incidents (22 July, 13 August, 24 September 2026) and six major ones on the cloud agent or web app since 10 July 2026


## Score by category

| Category | Weight | Antigravity CLI | Devin | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 43 | 30 | Antigravity CLI +13 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 78 | 80 | Devin +2 |
| Agent ergonomics | 13% (16.2 this run) | 78 | 62 | Antigravity CLI +16 |
| Security & auth | 14% (17.5 this run) | 53 | 72 | Devin +19 |
| Payments & pricing | 10% (12.5 this run) | 30 | 20 | Antigravity CLI +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 68 | 63 | Antigravity CLI +5 |
| Transparency & trust | 7% (8.8 this run) | 54 | 69 | Devin +15 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **57.7 · C** | **55.7 · C** | |

## Facts side by side

| Fact | Antigravity CLI | Devin |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Google | Cognition AI, Inc. |
| Hosted endpoint | no (local only) | `https://mcp.devin.ai/mcp` |
| Transports |  | HTTP |
| Auth | OAuth or key | API 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 service under Cognition's Platform Terms of Service |
| Tools exposed | none | 13 |
| Read-only variant documented | no | yes |
| llms.txt | yes | yes |
| Last release | 2026-10-08 | 2026-10-07 |
| Terms last updated |  | 2026-06-30 |
| Privacy policy last updated | 2026-10-01 | 2026-03-09 |
| Customer content may train models | yes | yes, with an opt-out |
| Terms restrict automated access |  | not found in the text |
| Terms restrict benchmarking |  | yes |
| Terms or service can change without notice |  | not found in the text |
| Arbitration or class-action waiver |  | yes |

## 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.

**Devin.** The v3 API is well specified, with a public OpenAPI 3.1 file covering 239 operations, problem+json errors, cursor pagination and service-user keys tied to roles. The status page records three critical and several major incidents on the cloud agent between 22 July and 24 September 2026, and no rate limit figures or retry guidance were found in the reviewed documentation.

## 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

### Devin

1. Use a `cog_` service-user key with the Member role. Legacy `apk_` keys fail against v3 and the MCP server with 401 or 403
2. Set `max_acu_limit` on every session you create. Usage is metered by the work done and has no published unit rate
3. Session creation is not idempotent in v3. After a timeout, list sessions by tag before creating again
4. Enterprise keys and personal access tokens must send `X-Org-Id` to the MCP server. Organisation-scoped keys resolve it automatically
5. Create scheduled work as an automation. POST to the schedules endpoint returns 403 for migrated organisations since 24 September 2026

## Questions

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

Antigravity CLI scores 57.7 (C) on agent readiness against Devin's 55.7 (C), and leads in 4 of 7 scored categories. Devin leads on security & auth and transparency & trust.


## For agents

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

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