> ## Documentation Index
> Fetch the complete documentation index at: https://arize-ax.mintlify.dev/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Experiment in Playground

> Run, compare, and share prompt experiments in the Playground with evaluators, comparison views, and saved Playground views.

Use Playground when you want a fast UI loop: load a prompt, run it on data, score with evaluators, compare runs, and keep the best setup.

## Run an experiment

<Steps>
  <Step title="Load a prompt and dataset">
    Open Playground, load your prompt, then select a dataset (or replay a production span).
  </Step>

  <Step title="Attach evaluators">
    Add [evaluators](/ax/evaluate/evaluators) so each output is scored automatically.
  </Step>

  <Step title="Run and inspect">
    Click **Run**, then open **View Experiment** to review outputs, latency, tokens, and evaluator scores.
  </Step>
</Steps>

## Compare experiments

Once you have multiple runs on the same dataset, open **Compare Experiments** to inspect:

* Output differences
* Evaluator deltas
* Summary metrics by run
* Regressions vs baseline

If you need full programmatic workflows, use [Experiment in code](/ax/improve/experiment-in-code).

## Playground views

A **Playground View** is a named snapshot of your Playground session.

It stores:

* Prompt messages and tools
* Model and parameter configuration
* Dataset or span context
* Generated results and scores

Use views to save progress, share a setup, or branch experiments without rebuilding from scratch.

<Frame caption="Save and manage Playground views from the Playgrounds list">
  <img src="https://storage.googleapis.com/arize-phoenix-assets/assets/images/arize-docs-images/evaluate/Screenshot%202026-04-22%20at%209.02.57%E2%80%AFPM.png" alt="Playgrounds list with options to edit name, duplicate, or delete saved playground views" />
</Frame>

## Related pages

* [Build a Prompt](/ax/improve/build-a-prompt)
* [Set up an experiment](/ax/improve/set-up-an-experiment)
* [Save and version prompts](/ax/improve/save-and-version-prompts)