
OpenRouter has launched the Fusion API - combine multiple models into one compound system that beats any of them solo.
> Fable 5 + GPT-5.5 fusion scored highest on the benchmark, 93/100 tasks
> Opus 4.8 + GPT-5.5 + Gemini 3.1 Pro fusion outscores every solo model including Claude Fable 5
> Even Opus 4.8 self-fused beats its solo score
Its basically Fable-level intelligence at half the price
The best model is no longer one model.

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