# Google Antigravity vs OpenAI Codex

> Google Antigravity: Google's agent-first platform for building software with parallel AI coding agents
> OpenAI Codex: OpenAI's coding agent that writes, reviews and runs code from terminal, IDE, desktop or cloud

- Google Antigravity profile: https://finderatlas.com/tools/google-antigravity
- OpenAI Codex profile: https://finderatlas.com/tools/openai-codex
- Comparison page: https://finderatlas.com/compare/google-antigravity-vs-openai-codex
- Last reviewed: October 2026

## Verdict

Google Antigravity and OpenAI Codex are both Coding AI tools. OpenAI Codex scores higher in FinderAtlas's editorial review (8.5 vs 8.3 out of 10), led by ease of use. Both have a free plan or trial. Only OpenAI Codex is available on Web.

### Choose Google Antigravity if

- You want a tool built for parallel coding agents, legacy migrations, automated testing, incident triage, prototyping.
- Free Individual plan with unlimited Tab completions and Command requests.
- Offers Gemini, Claude and GPT-OSS models in one tool.

### Choose OpenAI Codex if

- You want a tool built for delegating coding tasks to an agent.
- Included with ChatGPT plans, with a free tier and an $8 Go tier.
- Open-source CLI under the Apache-2.0 license.

## Pricing

| | Google Antigravity | OpenAI Codex |
| --- | --- | --- |
| Pricing model | Freemium | Freemium |
| Free plan or trial | Yes | Yes |
| Starting price | $0 | $0 |

## Features

| Feature | Google Antigravity | OpenAI Codex |
| --- | --- | --- |
| Antigravity App | Yes | Not listed |
| Antigravity CLI | Yes | Not listed |
| Antigravity IDE | Yes | Not listed |
| Background Subagents | Yes | Not listed |
| Verification Artifacts | Yes | Not listed |
| Multi-Model Support | Yes | Not listed |
| Extensibility | Yes | Not listed |
| Antigravity SDK | Yes | Not listed |
| Security Controls | Yes | Not listed |
| Codex CLI | Not listed | Yes |
| IDE extension | Not listed | Yes |
| Desktop app | Not listed | Yes |
| Cloud tasks | Not listed | Yes |
| Code review | Not listed | Yes |
| Non-interactive mode | Not listed | Yes |
| MCP, skills and plugins | Not listed | Yes |
| Subagents and web search | Not listed | Yes |
| Session resume and images | Not listed | Yes |
| Mobile remote control | Not listed | Yes |

## Platforms

| Platform | Google Antigravity | OpenAI Codex |
| --- | --- | --- |
| Web | No | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| iOS | No | No |
| Android | No | No |
| API | Yes | Yes |
| Browser Extension | No | No |
| Linux | Yes | Yes |
| CLI | Yes | Yes |
| VS Code Extension | Yes | Yes |
| JetBrains Plugin | Yes | Yes |

## Google Antigravity strengths

- Free Individual plan with unlimited Tab completions and Command requests.
- Offers Gemini, Claude and GPT-OSS models in one tool.
- Parallel agents and background subagents in isolated Git worktrees.
- Artifacts (plans, diffs, browser recordings) make agent output reviewable.
- Available as app, CLI, IDE extensions and Python SDK on macOS, Windows and Linux.
- Enterprise controls include SSO, VPC Service Controls and regional data residency.

## Google Antigravity limitations

- Pricing page gives no numeric rate limits or credit amounts, so quotas are hard to predict.
- Prices for Google AI Pro and Ultra are not shown on the Antigravity pricing page.
- Weekly and five-hour limits apply, with Gemini and Claude/GPT usage tracked separately.
- Product surfaces and release cadence are fast-moving, and some enterprise IDE features are still in Preview.

## OpenAI Codex strengths

- Included with ChatGPT plans, with a free tier and an $8 Go tier
- Open-source CLI under the Apache-2.0 license
- Available in the terminal, VS Code-based editors, the ChatGPT desktop app and the cloud
- Supports MCP, skills, plugins and subagents
- API-key option lets teams pay at API rates instead of a subscription

## OpenAI Codex limitations

- Plus has message limits per five hours that vary widely by model
- Cloud features are not available on the API Key plan
- Higher usage needs Pro, which starts at $100 per month
- Free and Go plans offer only GPT-6 Luna in the desktop app

## FAQ

**Is Google Antigravity better than OpenAI Codex?**

It depends on your workflow. Google Antigravity is built for parallel coding agents, legacy migrations, automated testing, incident triage, prototyping. OpenAI Codex is built for delegating coding tasks to an agent.

**What are the key feature differences between Google Antigravity and OpenAI Codex?**

Google Antigravity: Google's agent-first platform for building software with parallel AI coding agents. OpenAI Codex: OpenAI's coding agent that writes, reviews and runs code from terminal, IDE, desktop or cloud.

**Does Google Antigravity or OpenAI Codex have a free plan?**

Yes, both do. Google Antigravity is freemium and OpenAI Codex is freemium, and each has a free plan or trial.

**Which is cheaper, Google Antigravity or OpenAI Codex?**

Both can be used for free. Paid plans differ in limits and features, so compare the tiers in the pricing table above.