OrcaRouter: Fusion Mini

orcarouter/fusion-mini
Mini
Text in · Text out · 1M ctx

Fable 5 got pulled. Fusion rebuilds that level — from the models you can still call, at a fraction of the cost.

Overview

Stop waiting for the next model — the next jump in capability is a panel, not a checkpoint. Fusion sends your hardest prompts to several frontier models at once, then a judge weighs where they agree, catches where they contradict, and returns the single strongest answer — cross-checked against the rest. Reach for it on the work that actually matters — deep reasoning, hard coding, research, expert critique — anywhere being wrong costs more than a few extra completions.

How it works

1

Route by task

Casual chat goes straight to a cheaper default. Coding, agent, and tool-using requests fan out to the panel — where a second opinion actually pays off.

2

Fan out to a panel

Your prompt hits several frontier models at once — independent attempts that each catch what the others miss.

3

Pick the best answer

A judge reads every candidate and returns the single strongest one — cross-checked against the others, not a single model's first try.

Models in this router

Claude Opus 4.8GPT-5.5Claude Opus 4.8 · judge

Want a different combination? Build your own panel from the "Claude Fable 5 Level" templates in the routing DSL editor.

Code samples

from openai import OpenAI

client = OpenAI(
    base_url="https://api.orcarouter.ai/v1",
    api_key="$ORCAROUTER_API_KEY",
)

response = client.chat.completions.create(
    model="orcarouter/fusion-mini",
    messages=[{"role": "user", "content": "Hello"}],
)
print(response.choices[0].message.content)

Billing

Because fusion runs every panel member plus a judge, a fan-out request is billed as the sum of those underlying completions rather than a single model — and only on the requests that actually fan out. Zero markup.

FAQ

Where can I access the Claude Fable 5 API?
The Claude Fable 5 API was delisted and restricted, so it is no longer broadly callable. OrcaRouter: Fusion Mini is a drop-in, OpenAI-compatible alternative: it runs a panel of frontier models in parallel and a judge returns the strongest answer — a Fable-5-level option you can call today as orcarouter/fusion-mini.
What is OrcaRouter: Fusion Mini?
A curated multi-model router. On real work it runs a panel of models in parallel and a judge picks the single best answer, cross-checked against the rest; easy requests go to a cheaper default.
How is it billed?
As the sum of the panel members plus the judge it actually ran, only on the requests that fan out. Zero markup.