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The Playground is a native way to create and run new LLM requests all through PromptLayer. Your run history will be tracked in the sidebar. The Playground is most useful as a tool to “replay” and debug old requests.

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Replay requests

The Playground allows PromptLayer users to rerun previous LLM requests. Simply click “Open in Playground” on any historical request.
Open in Playground screenshot

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OpenAI Tools

The Playground fully supports OpenAI function calling. These tools can be accessed directly from the Playground interface and can be incorporated into your requests as needed. Not even OpenAI’s playground does this 👀
Tools dialogue

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Image Generation

The Playground supports image generation across multiple providers:
  • OpenAI Images API — Select “Images API” in the API dropdown to use models like gpt-image-1, dall-e-3, and dall-e-2. Write a text prompt and receive generated images directly in the output.
  • OpenAI Responses API — Add the image_generation built-in tool to let the model generate images during a conversation.
  • Google Gemini — Select a Gemini image model (e.g., gemini-2.5-flash-image) to generate images natively within chat responses.
Generated images are displayed with a rich card showing generation parameters, the revised prompt (when available), and the image itself. See the full Image Generation guide for details. Playground with generated image output

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Custom models

The Playground also supports the use of custom models for LLM requests. This means you can use a fine-tuned model or a dedicated OpenAI instance.