# Test richer prompts in the AI Gateway playground

> Attach images and text files, inspect reasoning and tool calls, and retry individual models while comparing responses in the playground.

- Date: 2026-09-16
- Author: Nijiko Yonskai
- Products: AI Gateway
- URL: https://ngrok.com/changelog/ai-gateway-playground-attachments

Compare how models respond to your images, code, and text in the AI Gateway playground. Select a file, paste it, or drag it into the message box to add it to your prompt.

Read reasoning as it streams from models that return it, expand tool calls, and view tables and formatted equations in responses. If one model fails, select **Retry** for that response without rerunning the others. Response details show timings measured in your browser. Select **View in logs** to inspect the request.

Attach PNG, JPEG, WebP, or UTF-8 text and code files. For images, choose a model that accepts image input. PDFs aren't supported. The playground keeps your drafts and attachments in your browser for the account you're using.

![Playground composer with a sample YAML file attached to a prompt and two models selected for comparison.](https://ngrok.com/blog-assets/images/2026-09-16-ai-gateway-playground-attachments/playground-attachment.png)

## Get started

[Create an ngrok account or sign in](https://app.ngrok.ai/). Create an [**access key**](https://app.ngrok.ai/keys) that allows your chosen provider and model, and confirm your account has credits.

Open the [playground](https://app.ngrok.ai/playground), select your access key and model, and attach a supported file. Use **Add model** to compare responses. Send your prompt, then select **View in logs** on a response to inspect the request.

To use the model in your application, follow the [**setup guide**](https://app.ngrok.ai/getting-started) for your SDK and language. Send an application request, then find it in [**Logs**](https://app.ngrok.ai/activity).