# PercentileStats Latency percentiles in milliseconds over the last 30 minutes. Latency measures time to first token. Only visible when authenticated with an API key or cookie; returns null for unauthenticated requests. ## Fields | Field | Type | Required | Description | Example | | ------------------------ | ------------------------ | ------------------------ | ------------------------ | ------------------------ | | `p50` | *float* | :heavy_check_mark: | Median (50th percentile) | 25.5 | | `p75` | *float* | :heavy_check_mark: | 75th percentile | 35.2 | | `p90` | *float* | :heavy_check_mark: | 90th percentile | 48.7 | | `p99` | *float* | :heavy_check_mark: | 99th percentile | 85.3 |