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Codex CLIKiro
Freemium

The CLI itself is free and open source, but using it requires a paid or quota-limited…

 Freemium

Free to start, with paid plans that include usage credits.

Windows, macOS, Linux, Command line Command line
  • Open source terminal client under the Apache license
  • Integrates into existing workflows via CLI and IDE plugins
  • Spec-driven workflow from requirements to tasks
  • Property-based tests to check correctness
  • Requires an OpenAI account or API access to function
  • Usage limits depend on the access route chosen
  • Relies on cloud AI models and an account
  • Heavier use requires a paid plan
Downloadable app Downloadable app
Open source Closed source
License: Apache-2.0 License: Proprietary
Not stated if an account is needed Account needed
Not stated if it works offline Needs internet

Checked September 22, 2026

Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.