You can use your Codex plan with it. OpenAI endorsed it several weeks ago, as far as I remember. That could change, however, but now seems safe.
You can use your Claude or Gemini plan with it too for now, though Anthropic and Google have made it clear this is a ToS violation.
You can use your Claude or Gemini plan with it too for now, though Anthropic and Google have made it clear this is a ToS violation.