> ## Documentation index
> Fetch the complete documentation index at: https://arize.com/llms.txt
> Ask it with GET https://arize.com/ask?q=<keywords or question>. Short keywords rank best.
> Use these to discover all available pages before exploring further.

# 08.09.2025: Playground Support for GPT-5

> Available in Phoenix 11.21+

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![](https://storage.googleapis.com/arize-phoenix-assets/assets/images/phoenix-docs-images/gpt-5-release-notes.png)
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**GPT-5** is now available in the Phoenix Prompt Playground. Run experiments with the new model, or grab previous traces and replay them using GPT-5. Test and leverage the latest model for evaluation and experimentation workflows.