Coding agents
Codex
OpenAI
OpenAI's coding agent, used by more than 4 million people every week according to OpenAI (May 2026). Named a Leader by Gartner.
- Pricing
- Included in ChatGPT Free ($0), Go ($8), Plus ($20) and Pro (from $100/month), or billed per use with an API key (source: developers.openai.com/codex/pricing).
- License
- Codex CLI under Apache-2.0 (github.com/openai/codex); cloud service and ChatGPT app proprietary
- Updated on
- Platforms
- CLI, IDE, Web, Desktop, Mobile