Claude Code can use GPT-5 via LiteLLM

https://docs.anthropic.com/en/docs/claude-code/llm-gateway#l...

https://docs.litellm.ai/docs/tutorials/claude_responses_api

and access to Cursor's background agent on the web as well, like ChatGPT Codex. So to this point, I'm regret cancelling my Cursor subscription already