Multimodality support

You can now attach images and other files directly to your prompts. Perfect for anyone building image-aware or multimodal workflows.

What’s new

• Attach files to any user message
• Create file variables for controlled, repeatable tests
• *ariables dynamically from large test sets

Why it matters

• Build and validate multimodal prompts with real inputs
• Keep test cases organized, consistent, and reproducible
• Ideal for JSON-based image pipelines, annotation agents, and vision tasks

How it works

• Add files straight to a message,
• or define file variables and map them to your test cases.
• LangFast handles the rest.