> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Architecture

Model architecture information

## Fields

| Field              | Type                                                                       | Required             | Description                   | Example |
| ------------------ | -------------------------------------------------------------------------- | -------------------- | ----------------------------- | ------- |
| `InputModalities`  | \[][components.InputModality](../../models/components/inputmodality.mdx)   | :heavy\_check\_mark: | Supported input modalities    |         |
| `InstructType`     | [\*components.InstructType](../../models/components/instructtype.mdx)      | :heavy\_check\_mark: | Instruction format type       | chatml  |
| `Modality`         | `*string`                                                                  | :heavy\_check\_mark: | Primary modality of the model | text    |
| `OutputModalities` | \[][components.OutputModality](../../models/components/outputmodality.mdx) | :heavy\_check\_mark: | Supported output modalities   |         |
| `Tokenizer`        | [\*components.ModelGroup](../../models/components/modelgroup.mdx)          | :heavy\_check\_mark: | N/A                           | GPT     |