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In a Platform Agent chat, people choose a tier, not a model. Admins decide which model each tier runs on in Settings > Models.

Change a tier’s model

  1. Open Settings > Models.
  2. Next to a tier, open the model picker and choose any model from the catalog.
The change applies to your whole organization. A tier you haven’t changed keeps using its default. People in chat see only the tier names, never the model behind them.
Tiers apply to Platform Agent chats. Agents each use the model set on the agent.