YESSS, I have been waiting for this. Fusion is so good, I’ve been using it primarily for creative work via their web ui. The results are genuinely better than any given model on its own. You can combine the dry rationality of gpt-5.5 with the creative lateral thinking skills of Gemini and the empathetic response of Claude; then have Opus synthesise something that meets in the middle.
Btw I noticed a quirk with all models via fusion; ask them to name a female character and they ALL independently chose “Elara Vance” several times. I noticed this in Claude, GPT, Gemini, Minimax, GLM, Grok, Kimi.
I wonder why.
Introducing the Fusion API, the smartest compound model in the market.
Fusion achieves Fable-level intelligence at half the price.
How it works 👇