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Body Builder (beta).

text closed 128K ctx
Fastest
41 tok/s
on OpenRouter

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:...

Hosted API only

No self-host path — closed weights.

Body Builder (beta)'s weights aren't published. Use it via the access providers below.

Where to use it

Cheapest hosted endpoints.

Provider Access $/M in $/M out
OpenRouter api aggregator — — Launch ↗
Performance

Speed across providers.

Tokens/sec and time-to-first-token measured against the same prompt template on each provider's API.

Provider Tokens/sec TTFT Total
OpenRouter 40.6 11443 ms 11517 ms
FAQ

Frequently asked.

How do I run Body Builder (beta)?
Body Builder (beta) is a closed-source API model. The cheapest way to access it is through the API providers listed on this page (direct API, aggregators, and hosted chat UIs).
Where can I access Body Builder (beta)?
Body Builder (beta) is available via OpenRouter. Each access option lists its own pricing (per million tokens or hourly hosting).
How much does it cost to run Body Builder (beta)?
Pricing varies per access provider — check each entry in the access table for current rates.
Is Body Builder (beta) open-source or proprietary?
Body Builder (beta) is a proprietary model from Openrouter. Access is API-only — there are no public weights to download.