I built PolyGPT to solve a problem I had: constantly tab-switching between ChatGPT, Claude, and Gemini to
compare their responses.
It's a desktop app (Mac/Windows/Linux) that lets you type a prompt once and see all three AI models respond
simultaneously in a split view. Useful for:
- Comparing technical explanations
- Getting multiple perspectives on code problems
- Fact-checking answers across models
The app is free, open source, and runs locally - your credentials stay on your machine.
Download: https://polygpt.app
Source: https://github.com/ncvgl/polygpt
Would love feedback from the HN community. What other features would make this more useful?
