Suprmind lets you run prompts against GPT, Claude, Gemini, Grok, and Perplexity...

https://aitoptools.com/tool/suprmind/

Suprmind lets you run prompts against GPT, Claude, Gemini, Grok, and Perplexity in one conversation. By making these models challenge each other, you catch blind spots you’d miss alone. Start a free trial; full access is only $4/month.