> ## 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.

# PreferredMaxLatency

Preferred maximum latency (in seconds). Can be a number (applies to p50) or an object with percentile-specific cutoffs. Endpoints above the threshold(s) may still be used, but are deprioritized in routing. When using fallback models, this may cause a fallback model to be used instead of the primary model if it meets the threshold.

## Supported Types

### `float`

```python theme={null}
value: float = /* values here */
```

### `components.PercentileLatencyCutoffs`

```python theme={null}
value: components.PercentileLatencyCutoffs = /* values here */
```