Chat Model Selection
How to choose the model used for text chat in the Web App.
Overview
In the Web App, the model in the header is the Chat model. It handles text messages, attachments, tool use, Knowledge Base retrieval, and thinking mode in chat.
The Chat model is separate from Settings → Voice. Voice Agent has its own model and voice choices for Standard mode and Realtime mode. See Model and Voice Settings.
Switching Models
Click the model name in the header to open the chat model selector. The list you see depends on your current plan and the models available to the assistant.
On desktop, hover over a model to see:
- Credit usage
- Model description
- Supported input types
- Supported output types
See AI Models for the full model catalog and Plans & Pricing for plan access.
When to Change the Chat Model
| Need | How to choose |
|---|---|
| Fast answers and daily tasks | Use an efficient model or keep the default |
| Long analysis, reasoning, or coding | Choose a stronger reasoning model if your plan includes it |
| Files or multimodal content | Choose a model with the right input/output types |
| Cost control | Check the credit usage label in the dropdown and see Credits & Usage |
Thinking Mode
Some Chat models support thinking levels. When the current model supports it, a Think selector appears in the input bar.
| Level | Best for |
|---|---|
| Off | Fast responses |
| Low | Everyday questions |
| Medium | Multi-step analysis |
| High | Math, logic, coding, or tasks that need deeper reasoning |
If the selector does not appear, the current Chat model does not support this mode.
Higher thinking levels can consume more credits. See Credits & Usage.
Remembered Selection
Your selected Chat model is remembered for future conversations in the Web App. You can change it anytime from the header.