PolyGPT – ChatGPT, Claude, Gemini, Perplexity responses side-by-side
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:…
In plain words
PolyGPT is a free, open-source desktop application for Mac, Windows, and Linux that lets users send a single prompt to ChatGPT, Claude, and Gemini simultaneously and view their responses side-by-side. Designed for developers and researchers who need to compare how different AI models handle the same question, it's particularly useful for evaluating technical explanations, troubleshooting code problems, and fact-checking answers across models. The app runs locally, keeping user credentials secure on their machine.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
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?
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