> ## 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.

# PrivateEndpointReasoningReturnMechanism

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.

## Example Usage

```go theme={null}
import (
	"github.com/OpenRouterTeam/go-sdk/models/components"
)

value := components.PrivateEndpointReasoningReturnMechanismContentString

// Open enum: custom values can be created with a direct type cast
custom := components.PrivateEndpointReasoningReturnMechanism("custom_value")
```

## Values

| Name | Value |
| - | - |
| `PrivateEndpointReasoningReturnMechanismContentString` | content-string |
| `PrivateEndpointReasoningReturnMechanismReasoningContent` | reasoning-content |
| `PrivateEndpointReasoningReturnMechanismReasoning` | reasoning |
| `PrivateEndpointReasoningReturnMechanismNone` | none |