OpenAI Codex
Claim this toolDelegate coding tasks in plain language, get pull requests
Free plan availablePositions OpenAI Codex holds among the tools of each category it belongs to (Toolradar data, Oct 2026):
- #74 (joint) most-listed alternative in AI Agents, out of 995 tools in AI Agents. Source: Toolradar data, Oct 2026.
- #16 most compared in AI Agents, out of 162 tools with 20+ compare-page visits in AI Agents. Source: Toolradar data, Oct 2026.
The Bottom Line
- Price
- Free plan available. Compare plans
Key facts
- Cloud agent in ChatGPT that takes a coding task and returns a reviewable pull request
- Runs each task in an isolated sandbox, so you can run many in parallel
- Connects to GitHub, follows AGENTS.md, and shows the test logs behind every change
Cons
- Meaningful use requires a paid ChatGPT subscription such as Plus, Pro, Business, or Enterprise, since access on the Free and Go tiers is very limited.
- The cloud sandbox runs with internet access disabled during task execution by default, so any task that needs to install dependencies or call external APIs requires you to manually configure domain allowlists and permitted HTTP methods per environment.
- Codex executes autonomously in isolated containers and hands back a finished pull request, so you cannot steer or correct it mid-task the way you can with interactive assistants like Cursor; you only review the changes after the run completes.
- The Codex CLI assumes a Unix-style environment, so Windows users must run it through WSL2 rather than natively, adding setup friction.
What is OpenAI Codex?
Ratings Across the Web
OpenAI Codex holds an aggregate rating of 4.7 out of 5 from 5 reviews across G2 and SourceForge, last checked May 29, 2026.
Ratings aggregated from independent review platforms. Learn more
Key Features
- Delegate tasks in natural language and get back a pull request
- Sandboxed cloud environment per task with parallel execution
- GitHub integration and repo-aware setup via AGENTS.md
- Runs tests and surfaces logs so changes are verifiable
- Companion Codex CLI for local terminal work
Pricing
OpenAI Codex offers a generous free tier with optional paid upgrades for advanced features.
OpenAI Codex by the numbers
- #74 (joint) most-listed alternative in AI Agents, out of 995 tools in AI Agents. Source: Toolradar data, Oct 2026.
- #16 most compared in AI Agents, out of 162 tools with 20+ compare-page visits in AI Agents. Source: Toolradar data, Oct 2026.
| Metric | OpenAI Codex | Peer median | Position (1 is best) |
|---|---|---|---|
| Free plan | Yes | 88% have one | n/a |
| Listed as an alternative to | 10 tools | 0 | #21 of 179 (joint) |
| Media mentions, last 30 days | 7 articles | 4 | #4 of 9 tools mentioned in the last 30 days |
| Compare-page visits, last 30 days | 77 visits | 31 | #13 of 50 tools with 20+ compare-page visits |
Visitors most often compare OpenAI Codex with Cursor, GitHub Copilot and Claude Code (last 30 days, Oct 2026).
Each position is counted among the tools that have data for that row, as noted under it. All AI Coding data · How we compute this. Advertising and placement fees are not inputs to any position. Visit counts include visits from every source.
Cite this: Toolradar, “OpenAI Codex by the numbers”, Oct 2026.
Reviews
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