openrouter fusion - capabilities similar to Anthropic Fable

2026-06-15 11 min read AI Articificial Intelligence Zapgpt Models

Openrouter Fusion

Openrouter announced openrouter/fusion, a drop-in model alias that they touted can be as good as Anthropic Fable. So, I thought I will give it a try and here are my observations. But before that, here’s how it works (as described by OpenRouter):

Introducing the Fusion API, the smartest compound model in the market.

Fusion achieves Fable-level intelligence on deep research tasks at half the price.

A panel of configurable models analyzes your prompt in parallel when the judge model thinks it’s needed, letting you build your own LLM councils to:

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