Suprmind.ai lets you query GPT, Claude, Gemini, Grok, and Perplexity...

https://instaquoteapp.com/where-can-i-find-suprmind-ai-reviews-and-alternatives/

Suprmind.ai lets you query GPT, Claude, Gemini, Grok, and Perplexity simultaneously. It is designed for deep research, using Debate and Red Team modes to track disagreements and pressure-test your assumptions