Tier 2Verified 3 May 2026
OpenAI Codex
OpenAI's coding agent for software engineering.
Who it's for
Developers who want an AI that can write, test, and iterate on code autonomously. Built for real software engineering workflows.
What you can do today in 60 seconds
- Sign up for Codex at https://openai.com/codex
- Describe a feature: 'Add pagination to this API endpoint.'
- Review the generated code, tests, and documentation.
How it actually works
Codex is OpenAI's coding agent built on GPT-4. It can plan, write, test, and debug code across multiple files. It operates in a sandboxed environment.
Pricing today
Requires API access. Pricing varies by compute used.