OpenAI Codex
Free (limited); Go $8/mo; Plus $20/mo; Pro from $100/mo; Business $20/user/mo annually source
- Best for
- Developers leaving over usage limits who want the same kind of terminal agent on a different subscription: Codex comes with ChatGPT plans from Go at $8/mo, as a CLI (open source, Apache-2.0), IDE extension, desktop app and cloud agent.
- What it fixes
- Usage limits; Claude-only models.
- Skip it if
- Claude models do better on your codebase; Codex runs OpenAI models.