Choose a model
Change the narration engine and reasoning effort.
Switch models
Select the model name at the top of the play page, or open Settings → Narration engine, choose the provider, then the model.
Subsequent generation uses the selected model without rewriting existing content. Use Switch model and regenerate to regenerate the current response with another model.
Reasoning effort
Models that support reasoning effort show the available options. Their names match each provider's own documentation, and which ones appear depends on the model.
Models and options affect generated content and usage. View actual charges in Usage & billing.