While the tread is swapping between "OMG Claude good. OpenAI was done for" and "OMG Codex good. Anthropic was done for". I've never heard about Gemini and Grok. It works mostly similar performance, but people don't mention that much.

Still, my impression is, Gemini hallucinate too much while Grok is always less capable than competitors so it's not worth using it.