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Show HN: PolyGPT – ChatGPT, Claude, Gemini, Perplexity responses side-by-side (polygpt.app)

26 points by ncvgl ↗ HN
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?

13 comments

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hotgeart
Does it need an API Key or it's like an 'iframe' of the web version?
unstatusthequo
Now you just need to add a judge node that compares the responses, fact checks them, and outputs the best response of the three. Although this makes another issue of which model is that judge.
BeetleB
Just FYI, Open WebUI has this feature built-in.
benterix
> Would love feedback from the HN community. What other features would make this more useful?

A web app

natoucs
I would if I found a way to keep access to the frontends of each LLM provider while being the web
scottydelta
Check out open web UI, it’s self hostable web app that can connect to different providers and models.
sidcool
Make a web all pls. I'm not going to install a native app from unknown source.
natoucs
That makes sense. But you can't access the native frontend if it is in a webapp
browningstreet
Ninja Chat offers this.
natoucs
It doesn't offer to keep access to the native frontends
scottydelta
Open Web UI already provides this as a self hosted web solution.

One good feature I like is ability to generate multiple responses from different models and merge it using one default model.

natoucs
Very nice! Do you still get access to the frontend of the original LLM providers and do you have to insert API keys ?
elsa26
Make it a web app - there would definitely be less friction to try it out.