# Openrouter Fusion API

> Source: <https://openrouter.ai/openrouter/fusion>
> Published: 2026-06-15 07:10:57+00:00

# OpenRouter: Fusion

[openrouter](/openrouter)/fusion

Fusion turns your prompt into a small multi-model deliberation. A panel of expert models (see below) analyzes your prompt in parallel with web search and web fetch enabled, then a judge model synthesizes their responses into a structured analysis — consensus, contradictions, partial coverage, unique insights, and blind spots — and writes the final answer from it.

By default the panel is the `Quality`

preset; switch to `Budget`

for cheaper members, or override the panel and judge entirely with the fusion plugin's `analysis_models`

and `model`

fields. Reach for Fusion when a single model isn't enough — research, expert critique, or anywhere the cost of being wrong outweighs a few extra completions.

Because Fusion runs every panel member plus a judge call, your request is priced as the sum of those underlying completions rather than a single model. To see which models ran, visit [Activity](/activity).

Learn more in our [docs](/docs/guides/features/plugins/fusion). For another way to route, see the [Auto Router](/openrouter/auto).

## Quick Start

Drop-in code to call this model. OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. The only thing that changes between models is the model slug below.