AI Providers Overview
Saga is provider-agnostic — every AI call goes through a common LLMProvider interface. You can mix providers per task (see Model Routing) or just set one default.
| Provider | Setup required | Token usage |
|---|---|---|
| VS Code LM (Copilot) | None beyond Copilot | Estimated |
| Anthropic | API key (BYOK) | Exact |
| Gemini | API key (BYOK) | Exact |
| OpenAI | API key (BYOK) | Exact |
| OpenRouter | API key (BYOK) | Exact |
| Local | Ollama or LM Studio running locally | Exact |
Where you configure providers
Open Settings from the Command Palette. Each provider card lets you enable it, enter a key (BYOK) via a SecretStorage-backed input box, and Test Connection.
A note on Copilot / consumer OAuth
Saga only ever uses provider SDKs with an explicit API key (BYOK) or the official VS Code Language Model API for Copilot. Reusing a consumer chat app's OAuth session to call a model API on the side is not supported and won't be added — both Anthropic and Google have blocked this pattern for their consumer products.
Next steps
- Model Routing — assign a specific model per generation task
- Pick a provider above for setup instructions