Transform your natural language requests into structured OpenRouter API request objects. Describe what you want to accomplish with AI models, and Body Builder w
No signup required — 10,000 session credits for guests. 50,000 free credits on account creation.
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:...
128,000-token context window — enough for long documents.
Hosted by Openrouter — you can access it here alongside GPT-4o, Claude, Gemini and 100+ more on one plan.
Switch to any other model mid-conversation from the picker.
Around -900000000–-2250000000 credits per typical message. Very cheap — fits hundreds of messages in the 50k signup bonus.
Body Builder (beta) is a chat/completion model served by Openrouter and accessed through Faceb.ai. Try it without signing up — guest users get 10,000 session credits to experiment.
You get 50,000 credits on signup — usually enough for a handful of messages. After that, Pro is $14.99/month for 15M credits, or top-ups from $5.
128,000 tokens. Paste your source material in, no need to truncate.
Yes. Any API key from /account/api/ works with model slug `openrouter/bodybuilder`. The OpenAI SDK works with base_url=https://api.faceb.ai/v1.
Depends on the task. Faceb.ai lets you switch models per message — benchmark side-by-side by asking both the same prompt, which is more reliable than abstract comparisons.
Around -900000000–-2250000000 credits per typical message. Very cheap — fits hundreds of messages in the 50k signup bonus.
No. We contractually request that upstream providers not train on content routed through us. Your chat history lives only on your account.
It depends on the model size and training mix. For serious code work the developer favourites are Claude 3.5 Sonnet and DeepSeek V3; for quick edits, most capable models work fine.
Yes — point your SDK at https://api.faceb.ai/v1 and use this model's slug as the model parameter. Everything else works as normal.
Check the model catalog — multimodal models are marked in the picker. If it accepts images, you can drop screenshots and diagrams straight into the chat.
Yes — the picker is always at the top of the chat. Previous context carries over.
Yes. Our catalog auto-fetches from the upstream aggregator, so provider updates and new versions appear in the picker as soon as they're available.
Your Faceb.ai credits work for every model — switch per message, no extra subscriptions.
OpenAI's flagship multimodal model — text, vision, and code.
Chat with GPT-4o →OpenAI's fastest, cheapest frontier model — great default.
Chat with GPT-4o mini →Anthropic's best balance of quality and cost — a coder favourite.
Chat with Claude 3.5 Sonnet →One subscription covers every frontier model — switch between them per message. No extra API keys, no extra bills.
Start chatting with Body Builder (beta) → Go Pro · $14.99/mo