> ## 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.

# PrivateEndpointSettingsReasoning

## Fields

| Field | Type | Required | Description | Example |
| - | - | - | - | - |
| `return_mechanism` | [Nullable\[components.PrivateEndpointReasoningReturnMechanism\]](../components/privateendpointreasoningreturnmechanism.mdx) | ✔️ | Where the upstream puts reasoning tokens in its response: `reasoning` and `reasoning-content` are response fields, `content-string` is inline in the message, `none` returns no reasoning. `null` uses the provider default. | reasoning |
| `supported` | *bool* | ✔️ | Whether requests with `reasoning` route to this endpoint. | true |