08.09.2025: Playground Support for GPT-5 🚀

Available in Phoenix 11.21+

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.

feat(playground): support gpt-5 by axiomofjoy · Pull Request #8985 · Arize-ai/phoenixGitHub