Suprmind lets you use GPT, Claude, Gemini, Grok, and Perplexity together in one...

https://www.bookmark-tango.win/suprmind-combines-gpt-claude-gemini-grok-and-perplexity-in-a-single-chat-1

Suprmind lets you use GPT, Claude, Gemini, Grok, and Perplexity together in one chat, making it easier to compare answers and keep track of disagreements