# ChatGptOptionsBuilder.DefaultModel property

Gets or sets the default model for chat completion. (default: [`Gpt35_Turbo`](../../ChatGptNet.Models/OpenAIChatGptModels/Gpt35_Turbo.md) when the provider is  OpenAI).

```csharp
public string? DefaultModel { get; set; }
```

## See Also

* class [OpenAIChatGptModels](../../ChatGptNet.Models/OpenAIChatGptModels.md)
* class [ChatGptOptionsBuilder](../ChatGptOptionsBuilder.md)
* namespace [ChatGptNet](../../ChatGptNet.md)

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