docs: document small_model cfg option (#1347)

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Aiden Cline
2025-07-26 16:56:38 -05:00
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@@ -63,16 +63,19 @@ opencode comes with two built-in modes: _build_, the default with all tools enab
### Models
You can configure the providers and models you want to use in your opencode config through the `provider` and `model` options.
You can configure the providers and models you want to use in your opencode config through the `provider`, `model` and `small_model` options.
```json title="opencode.json"
{
"$schema": "https://opencode.ai/config.json",
"provider": {},
"model": ""
"model": "anthropic/claude-sonnet-4-20250514",
"small_model": "anthropic/claude-3-5-haiku-20241022"
}
```
The `small_model` option configures a separate model for lightweight tasks like summarization and title generation. By default, opencode tries to use a cheaper model if one is available from your provider, otherwise it falls back to your main model.
You can also configure [local models](/docs/models#local). [Learn more](/docs/models).
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