openrouter/fusion

Name: OpenRouter: Fusion
Availability: InStock
Author: Openrouter

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...

Input⌘ / Ctrl + Enter

Try a prompt

Prompt

128K max output

Input $0.0000/M · Output $0.0000/M

OutputReady

Your response will appear here

Choose an example or write a prompt, then click Run.

API details and access

Model Details

ProviderOpenrouter

TypeLlm

Model IDopenrouter/fusion

Capabilities

InputText

OutputText

Context-

Max Output128,000

VisionNot supported

Function CallingNot supported

Access details

Chat Completions

Base URLhttps://api.sandbase.ai

API Endpoint/v1/chat/completions

{
  "model": "openrouter/fusion",
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ],
  "max_tokens": 512
}

Pricing

Input$0.0000 / 1M tokens

Output$0.0000 / 1M tokens

Production endpoint

Send your first request

OpenAI-compatible endpoint with unified authentication and usage tracking.

POSThttps://api.sandbase.ai/v1/chat/completions

Model IDopenrouter/fusion

Input Schema

4 parameters · 1 required · 3 optional

Parameter	Type	Required	Description
`messages`	object[]	Required	—
`stream`	boolean	Optional	Default: false
`max_tokens`	integer	Optional	Max: 128000
`temperature`	number	Optional	Min: 0 · Max: 2 · Default: 1

Output Schema

Field	Type	Description
`id`	string	Unique identifier for the completion
`object`	string	Object type, e.g. "chat.completion"
`model`	string	Model used for the completion
`choices`	array	List of completion choices
`choices[].message.content`	string	Generated text content
`choices[].finish_reason`	string	Reason the generation stopped
`usage.prompt_tokens`	integer	Number of tokens in the prompt
`usage.completion_tokens`	integer	Number of tokens in the completion
`usage.total_tokens`	integer	Total tokens used

Code Examples

Ready-to-run snippets

curl https://api.sandbase.ai/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "openrouter/fusion",
    "messages": [{"role": "user", "content": "Hello"}],
    "temperature": 0.7,
    "max_tokens": 2048,
    "stream": true
  }'

← Back to OpenRouter: Fusion

Related Models

openrouter/autoYour prompt will be processed by a meta-model and routed to one of dozens of models (see below), optimizing for the best possible output. To see which model was used, visit [Activity](/activity), or read the `model` attribute of the response. Your response will be priced at the same rate as the routed model. Learn more, including how to customize the models for routing, in our [docs](/docs/guides/routing/routers/auto-router). For another way to route, see [Pareto Code](/openrouter/pareto-code).openrouter/bodybuilderTransform your natural language requests into structured OpenRouter API request objects. Describe what you want to accomplish with AI models, and Body Builder will construct the appropriate API calls. Example: "count to 10 using gemini and opus." This is useful for creating multi-model requests, custom model routers, or programmatic generation of API calls from human descriptions. **BETA NOTICE**: Body Builder is in beta, and currently free. Pricing and functionality may change in the future.openrouter/pareto-codeThe Pareto Router maintains a tiered shortlist of strong coding models, ranked by [Artificial Analysis](https://artificialanalysis.ai/) coding percentiles. Set min_coding_score between 0 and 1 on the [pareto-router plugin](https://openrouter.ai/docs/guides/routing/routers/pareto-router#the-min_coding_score-parameter) to control how strong a coder you need; higher scores select stronger (and typically more expensive) models. If you omit min_coding_score, the router defaults to the High tier. Selecting Nitro from the variant dropdown ranks the models in your tier by measured throughput and routes each request to the fastest one, so you trade some model variety for lower latency. Read the [Pareto Router docs](https://openrouter.ai/docs/guides/routing/routers/pareto-router) for the full selection logic, fallback behavior, and how to customize routing. For another way to route, see the [Auto Router](/openrouter/auto).