← Back to changelog
March 28, 2025

Tool Calling and Structured Output in Playground

Picture Hassieb PakzadHassieb Pakzad

Define and test tool calls and structured output schemas directly in the Langfuse Playground

The Langfuse Playground now supports tool calling and structured output schemas, enabling you to define, test, and validate LLM executions that rely on tool calls and enforce specific response formats.

Tool Calling

  • Define custom tools with JSON schema definitions
  • Test prompts relying on tools in real-time by mocking tool responses
  • Save tool definitions to your project

Structured Output

  • Enforce response formats using JSON schemas
  • Save schemas to your project
  • Jump into the playground from your OpenAI generation using structured output

Learn more about the Langfuse playground here.

Was this page useful?

Questions? We're here to help

GitHub Q&AGitHubEmailTalk to sales

Subscribe to updates