OpenRouter Fusion Makes Model Panels a One-Call Primitive 🧪🤝

Retained excerpt

OpenRouter Fusion Makes Model Panels a One-Call Primitive 🧪🤝 The most annoying part of using multiple models is that you usually have to become the router yourself. You ask one model, compare it with another, maybe try a third, then manually decide which answer is right. OpenRouter's new Fusion API turns that pattern into a single call. You send a prompt to Fusion, it dispatches the task to a panel of models in parallel, gives them web search and web fetch, then uses a judge model to compare the answers before producing the final response. The results are worth paying attention to: Fable 5 + GPT-5.5 fused together scored 69.0% on DRACO, beating every individual model in OpenRouter's test, including Fable 5 alone at 65.3% and GPT-5.5 alone at 60.0%. That matters because Fable 5 is Anthropic's strongest model, and Fusion still found extra lift by pairing it with another frontier model instead of treating one model as the ceiling. OpenRouter also tested a budget panel with Gemini 3…

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