Current capabilities

Sutro is one product for building and running Functions. Functions is where you build and improve them. Batch runs them asynchronously at scale, and real-time runs one input at a time and returns the answer synchronously.

Capability	Functions	Batch	Real-time
Text inputs	✅	✅	✅
Image and PDF inputs	✅	❌	✅
Web search	✅	❌	❌
Custom tool calling	✅¹	❌	❌

¹ Tool calling while building a Function requires the relevant tools to be configured for your Sutro deployment. Build-time web search and tools do not carry into Batch execution.

Data and assets

Datasets: CSV, JSON, JSONL, and Parquet
Function assets: PNG, JPEG, WebP, and PDF
Batch files: CSV, Parquet, and TXT locally; CSV or Parquet by HTTPS URL
Function asset limits: images up to 5 MB; PDFs up to 32 MB and 100 pages