Devin vs OpenAI Codex
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
AI tool · Paid
Cognition's autonomous software engineering agent that takes tasks from Slack or tickets and delivers pull requests.
AI tool · Paid
OpenAI's coding agent that works in the cloud, a CLI and IDE extensions to write features, fix bugs and open pull requests.
The short answer
Choose Devin if you need…
- Delegating backlog tickets
- Teams experimenting with agent engineers
Choose OpenAI Codex if you need…
- Delegating tasks to a cloud agent
- ChatGPT subscribers who code
Side-by-side
| Devin | OpenAI Codex | |
|---|---|---|
| Type | Coding · Coding agents | Coding · Coding agents |
| Price | Paid | Paid |
| Platforms | Web | Web, CLI, VS Code, macOS, Linux |
| Works with | Slack, GitHub, Jira | GitHub, VS Code |
| Hands-on tested by us | Not yet | Not yet |
| Last checked | 2026-10-29 | 2026-10-29 |
What each one is
Devin
Cognition's autonomous software engineering agent that takes tasks from Slack or tickets and delivers pull requests. Handles routine tickets well. Unclear tasks lead to wasted runs, so scope work tightly.
OpenAI Codex
OpenAI's coding agent that works in the cloud, a CLI and IDE extensions to write features, fix bugs and open pull requests. Strong for well-scoped tasks. Review every pull request it opens; large refactors still need guidance.
Best for
Devin
- Delegating backlog tickets
- Teams experimenting with agent engineers
OpenAI Codex
- Delegating tasks to a cloud agent
- ChatGPT subscribers who code
Strengths
Devin
- Cloud workspace with browser and shell
- Slack and Jira task intake
- Pull requests
- Devin Desktop editor (formerly Windsurf)
OpenAI Codex
- Cloud tasks with parallel runs
- Open-source CLI
- IDE extension
- GitHub pull requests and reviews
Frequently asked questions
What is the difference between Devin and OpenAI Codex?
Devin: Cognition's autonomous software engineering agent that takes tasks from Slack or tickets and delivers pull requests. OpenAI Codex: OpenAI's coding agent that works in the cloud, a CLI and IDE extensions to write features, fix bugs and open pull requests. Devin suits delegating backlog tickets, while OpenAI Codex suits delegating tasks to a cloud agent.
Are Devin and OpenAI Codex free?
Devin: Paid. OpenAI Codex: Paid.
What are other alternatives to Devin and OpenAI Codex?
Other options people compare them with include Claude Code, Aider, Gemini CLI, Amp, Cline.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.