Google Antigravity Freemium
Google Antigravity is Google's agent-first development platform with a desktop app, IDE, CLI and SDK. The Individuals plan is free with weekly rate limits; higher limits come with Google AI Pro or Ultra.
AI Tool Profile
OpenAI Codex
Codex is OpenAI's coding agent, available in ChatGPT on the web, desktop and mobile apps, a CLI and an IDE extension. A limited allowance is included in the free ChatGPT plan; paid plans start at $8 a month.
Description of OpenAI Codex
Codex is OpenAI's coding agent. You give it a goal or a task, and it works on code for you, either in the cloud or on your machine. It is delivered through ChatGPT rather than as a separate subscription, so the plan you already pay for decides how much you can use.
OpenAI lists several places to use it: the ChatGPT desktop app, the ChatGPT mobile app, ChatGPT on the web, the Codex command-line tool, an IDE extension and Codex Cloud. The documentation also has sections on sandboxing, approvals, permissions and a separate Codex Security product, which matter if you let an agent run commands.
Codex is included with ChatGPT Free, Go, Plus, Pro, Business, Edu and Enterprise. The pricing documentation describes the Free plan as a way to try quick coding tasks and gives no numeric limit for it. Go costs $8 a month, Plus costs $20 a month, and Pro starts at $100 a month with tiers at $100, $200 and $500. Business is $20 per user per month billed annually, or $25 billed monthly.
Limits are expressed as usage allowances that differ by plan and can include weekly caps, so they are hard to compare with other tools. Using an API key instead is billed at API rates and may lack some cloud features. This makes Codex a practical option for people who already have a ChatGPT plan and want coding help without adding another subscription.
Features of OpenAI Codex
- Coding agent that takes a goal or task and works on code in the cloud or locally.
- Available in ChatGPT web, desktop and mobile apps, the Codex CLI, an IDE extension and Codex Cloud.
- Included in ChatGPT plans from Free (limited) upward, with documentation on sandboxing, approvals and permissions.
Frequently asked questions
Does Codex have a free tier?
Yes, in a limited form. ChatGPT Free includes Codex for quick coding tasks. OpenAI's pricing page gives no numeric usage limit for the Free plan.
How much does Codex cost?
It comes with ChatGPT plans: Go $8, Plus $20 and Pro from $100 per month. Business is $20 per user monthly billed annually, or $25 billed monthly.
Where can I run Codex?
In ChatGPT on the web, desktop and mobile apps, in the Codex CLI, in an IDE extension and in Codex Cloud.
Website: https://developers.openai.com/codex
Company: OpenAI
Key facts
OpenAI's coding agent bundled into ChatGPT plans, used via app, CLI or IDE extension. Limited free use; lowest paid plan with it is Go at $8/month. Limits are allowance-based and hard to compare.
| Pricing model | Freemium |
|---|---|
| Free tier | Yes · Included in ChatGPT Free for quick coding tasks; no numeric limit published |
| Starting price | $8 / month |
| Data residency | Not verified |
| Compliance (as stated by vendor) | Not verified |
| Integrations | Not verified |
| Public API | Not verified |
| Self-hostable | Not verified |
| Official site | Not verified |
| Can a general AI assistant replace it? | Codex is an LLM agent; a plain chat window can suggest code but cannot run tests or edit your repository on its own. |
| Last verified | 2026-10-10 by editor |
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Update history
- 2026-10-10 · ai alternative note updated (editor)
- 2026-10-10 · editor verdict updated (editor)
- 2026-10-10 · pricing page url updated (editor)
- 2026-10-10 · starting price usd updated (editor)
- 2026-10-10 · free tier updated (editor)
- 2026-10-10 · pricing model updated (editor)
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