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About Body Builder (Beta)
Transform 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.
Technical Specifications
- Model ID
- openrouter-bodybuilder
- Category
- LLM Models
- Task
- Text Generation
- Added
- February 20, 2026
Key Features
- Chat completion and multi-turn conversation API
- Streaming response with token-by-token output
- Function calling and tool use support
- System prompts and role-based messaging
- JSON mode and structured output
Quick Start
Integrate Body Builder (Beta) into your application with a single API call. Get your API key from the pricing page to get started.
import requestsimport jsonurl = "https://modelslab.com/api/v7/llm/chat/completions"headers = {"Content-Type": "application/json"}data = {"model_id": "openrouter-bodybuilder","messages": [{"role": "user","content": "Hello!"}],"max_tokens": 1000,"key": "YOUR_API_KEY"}try:response = requests.post(url, headers=headers, json=data)response.raise_for_status() # Raises an HTTPError for bad responses (4XX or 5XX)result = response.json()print("API Response:")print(json.dumps(result, indent=2))except requests.exceptions.HTTPError as http_err:print(f"HTTP error occurred: {http_err} - {response.text}")except Exception as err:print(f"Other error occurred: {err}")
Use Cases
- AI chatbots and virtual assistants
- Code generation and developer tools
- Content writing and copywriting automation
- Data analysis, summarization, and extraction
Body Builder (Beta) FAQ
Transform 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, cu
You can integrate Body Builder (Beta) into your application with a single API call. Sign up on ModelsLab to get your API key, then use the model ID "openrouter-bodybuilder" in your API requests. We provide SDKs for Python, JavaScript, and cURL examples in the API documentation.
The model ID for Body Builder (Beta) is "openrouter-bodybuilder". Use this ID in your API requests to specify this model.
Yes, ModelsLab offers a free tier that lets you try Body Builder (Beta) and other AI models. Sign up to get free API credits and start building immediately.