Answer is a classic programming one - it depends? There are definitely differences in strength and weaknesses among them.
I run claude CLI as a primary and just ask it nicely to consult gemini cli (but not let it do any coding). It works surprisingly well. OpenAI just fell out of my view. Even cancelled ChatGPT subscription. Gemini is leaping forward and _feels like_ ChatGPT-5 is a regression.. I can't put my finger on it tbh.
I run claude CLI as a primary and just ask it nicely to consult gemini cli (but not let it do any coding). It works surprisingly well. OpenAI just fell out of my view. Even cancelled ChatGPT subscription. Gemini is leaping forward and _feels like_ ChatGPT-5 is a regression.. I can't put my finger on it tbh.