Test prompts on spans (replay)

Replay your spans in the prompt playground

Any span on the LLM Tracing page can be loaded directly into the Prompt Playground for replay and iteration.

All LLM parameters, prompt templates, input messages, variables, and function definitions are automatically populated, so you can replicate the exact call without manual setup. This allows you to iterate quickly, test changes in context, and continuously refine prompts.

Select span & navigate to prompt playground

Experiment with parameters, prompts, and messages

Here, you can

• load different prompts from the Prompt Hub

• play around with different LLMs

• tune invocation parameters

• add new messages/functions to your prompt

Hit Run to see new output for this span.