None.

Claude. For me it has the highest level of thinking with creativity, accuracy, and thoughtfulness. Now, that it retains info beyond individual chats, it's a game changer! I always have a lot to say, a lot of documentation, a million thoughts, etc. Claude can follow me, simplify my wordiness relevant to the thought and intent... I engage other AIs based on their strengths... Copilot and Gemini are my other regulars. Now, I'm new to the AI game and still discovering.