Hey Product Hunt! 👋 I'm Luca, and I built PromptMux because I was tired of switching between ChatGPT, Claude, and Gemini tabs to compare responses. **The problem:** When you're crafting prompts or choosing the right model for a task, you need to see how different LLMs respond to the same input. But opening 3-4 tabs and copy-pasting prompts is tedious. **The solution:** PromptMux lets you send one prompt to multiple models and see all responses on a visual canvas. Drag nodes around, compare side-by-side, and save the best comparisons to your library. **Why open source?** I believe prompt engineering tools should be transparent. You bring your own API keys and you can self-host if you prefer. **What I'd love feedback on:** - Which models should I add next? - What features would make this more useful for your workflow? - Any UX improvements that would help? This is also a learning experience for me; I'm practicing the PH launch process. So meta-feedback on the launch itself is welcome too! 😄 Try it out and let me know what you think! 🔗 GitHub: https://github.com/lucaderumier/...

PromptMux

Compare LLM responses side-by-side, visually

Compare LLM responses side-by-side, visually