alt Hacker NewsIt's the other way around - Claude Code is the proprietary one. Codex CLI is open source:
https://github.com/openai/codex
You can definitely access the latest models via the API. That's how Codex CLI works.
It's the other way around - Claude Code is the proprietary one. Codex CLI is open source:
https://github.com/openai/codex
You can definitely access the latest models via the API. That's how Codex CLI works.
gpt-5.3 was not accessible via API, at least for me
But it was in codex