First generate an API key via https://aistudio.google.com/api-keys.
Navigate to brave://settings/leo-ai/ > Add new model. Set the following config:
- Label:
Gemini 3 Pro - Model request name:
gemini-3-pro-preview - Server endpoint:
https://generativelanguage.googleapis.com/v1beta/openai/chat/completions - Context size:
100000 - API key:
[your API key] - System Prompt: (…)