You can add multiple custom providers compatible with OpenAI Chat Completions API (Responses and Messages API for custom providers will be added in a future release).
Follow these steps:
API Settings click / tap "Add Custom Provider"Base URL for the API, for example https://api.x.ai. Preview the endpoint below the field. It should look like https://api.x.ai/v1/chat/completions/v1/models) or enter model name manuallyWhen you switch default provider, the logo on the compose button changes to the selected provider. After this all new chats will use the selected provider.