Chat with multiple LLMs: o1-high-effort, Sonnet 3.5, GPT-4o, and more
Hello HN! I was fed up switching between multiple UIs to ask GPT, Claude, etc… the same question and comparing the answers. So I built a way to ask multiple models the same question efficiently by having the LLM compare the responses and only show you new and valuable information from the 2nd model. This way you still get a fast response as normal from the 1st model, but also get any added value provided by the 2nd model. Initially I built my own UI to use this, but stumbled upon Open WebUI (formerly Ollama WebUI) which is fantastic, but is made more for local access to LLMs. So I talked to…
Chat with multiple LLMs: o1-high-effort, Sonnet 3.5, GPT-4o, and more launched on January 21, 2025 with 62 votes, #452 of 6,141 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
PolyChat lets users query multiple large language models simultaneously—such as o1, Sonnet 3.5, and GPT-4o—from a single interface. Rather than switching between different UIs and manually comparing responses, the tool sends the same question to multiple models and uses an LLM to highlight only the new or valuable information from subsequent responses. Built on Open WebUI with security improvements including XSRF and CORS fixes, it's designed for users who regularly compare outputs across different AI services.
written from the facts on this page · September 2026
From the sources
Combine the world
In the maker’s words, at launch
Hello HN! I was fed up switching between multiple UIs to ask GPT, Claude, etc… the same question and comparing the answers. So I built a way to ask multiple models the same question efficiently by having the LLM compare the responses and only show you new and valuable information from the 2nd model. This way you…
Does a similar job
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