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Phoenix v13.10.0 introduces four new AI providers for the playground and makes project settings editable.

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New playground providers

Phoenix now supports Cerebras, Fireworks AI, Groq, and Moonshot (Kimi) as first-class providers in the playground. All four use OpenAI-compatible APIs — no new dependencies required. AI Providers in Phoenix Cost tracking is included out of the box with 298 new model entries across all four providers.

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Editable project settings

You can now edit a project’s description and gradient colors directly from the Project Settings tab.

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Latest OpenAI models

The playground model list now includes new OpenAI models:
  • gpt-5.4, gpt-5.4-pro (and date-stamped variants)
  • gpt-5.3-chat-latest
  • gpt-5.2-pro, gpt-5.2-pro-2025-12-11
  • gpt-5-pro, gpt-5-chat, and date-stamped gpt-5, gpt-5-mini, gpt-5-nano variants
  • o3-pro-2025-06-10

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UI improvements

  • Experiment recording indicator — The loading spinner during playground experiments has been replaced with a pulsing red recording icon and an elapsed timer
  • Restyled Switch & Slider components — Improved dark mode contrast, smoother transitions, and a cleaner thumb ring on hover/focus

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Get started

Configure AI Providers

Full provider configuration guide

Cost Tracking

Learn about automatic cost tracking