Fusion — merge GPT, Claude and Gemini into one answer
Ask once, get the combined intelligence of multiple models. Fusion sends your prompt to GPT, Claude and Gemini and merges their best parts into a single, stronger answer.
One prompt, many minds
Instead of jumping between tabs, send a single message and let several models answer in parallel. Fusion synthesizes them so you get the strongest response, not just the first one.
Best of every model
Different models are good at different things. Fusion keeps the sharpest reasoning, the cleanest code and the clearest explanation from each — in one place.
Still your keys, still no markup
Fusion runs on your own connected API keys. You pay each provider directly, exactly like a normal chat.
Frequently asked questions
What is Fusion?
Fusion sends one prompt to multiple AI models (GPT, Claude, Gemini) at once and merges their answers into a single, combined response.
Does Fusion cost extra?
Fusion uses your own API keys and you pay each provider directly — there's no markup from OneChater.
Can I still see each model's individual answer?
Yes. You can compare each model side by side and also get the merged Fusion answer.
Get the best of every model at once
Stop tab-hopping. Ask once and let Fusion merge the answers.
Start free