# OpenRouter: Body Builder (beta)

> Body Builder turns a natural-language request into a structured OpenRouter API request object. Describe what you want to do with AI models and it builds the matching call. Beta router with a 128K context window. Available with a user-owned Respan key (BYOK).

**ID**: `openrouter/bodybuilder`  
**Creator**: OpenRouter  
**Category**: text  
**Context**: 128K tokens  
**Pricing**: BYOK — billed by your provider  
**Released**: 2025-12-05  
**Web page**: https://anyrouter.dev/model/openrouter/bodybuilder

**Input modalities**: text  
**Output modalities**: text  

**Capabilities**: chat, streaming

## Usage

**Endpoint**: `POST https://anyrouter.dev/api/v1/chat/completions`

```bash
curl https://anyrouter.dev/api/v1/chat/completions \
  -H "Authorization: Bearer $ANYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "openrouter/bodybuilder",
  "messages": [
    {
      "role": "user",
      "content": "Say hi in 3 words."
    }
  ]
}'
```

## Providers

| Provider | Input | Output |
| --- | --- | --- |
| respan-byok | BYOK — billed by your provider | — |

BYOK routes are billed by your own provider key — AnyRouter charges $0. Rates marked (list) are the provider's published list price.

## Source

- Upstream docs: https://openrouter.ai/openrouter/bodybuilder