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OpenKey

Fusion

OpenRouterReleased Jun 13, 2026

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...

Try in playground
Context window
1M tokens
Input
text
Output
text
Tokenizer
Router
Released
Jun 13, 2026

Pricing

Per 1M tokens. The provider price and our flat 3% fee are separate columns — what you pay is their sum.

Variable pricing — this router selects an underlying model per request, and you pay that model's price + 3%.

Call it

OpenAI-compatible: point your SDK at api.openkey.ai/v1 and use model openrouter/fusion.

Code sample language
curl https://api.openkey.ai/v1/chat/completions \
  -H "Authorization: Bearer $OPENKEY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openrouter/fusion",
    "messages": [{"role": "user", "content": "Hello"}]
  }'
import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.openkey.ai/v1",
    api_key=os.environ["OPENKEY_API_KEY"],
)

completion = client.chat.completions.create(
    model="openrouter/fusion",
    messages=[{"role": "user", "content": "Hello"}],
)
print(completion.choices[0].message.content)
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.openkey.ai/v1",
  apiKey: process.env.OPENKEY_API_KEY,
});

const completion = await client.chat.completions.create({
  model: "openrouter/fusion",
  messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);

Questions

What is Fusion's context window?
Fusion accepts up to 1M tokens of context.
Is Fusion OpenAI-compatible?
Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "openrouter/fusion" using any OpenAI SDK — only the base URL and API key change.
What inputs does Fusion support?
Fusion accepts text input and produces text output.

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