UserAgent.model

The device model from the Sec-CH-UA-Model hint, such as "Pixel 8". Desktop browsers report an empty value.

CurrentstringOptionalSince 2.6-202204

Field facts

Path: device.sua.model
Object: UserAgent
Type: string
Requirement: Optional
Added: OpenRTB 2.6-202204
Spec section: 3.2.29

How it is used

This recovers what user agent reduction removed: Chrome on Android now puts a placeholder K where the model used to be in device.ua. It is a high-entropy hint, so it is present only when requested.

Example

Where the field sits in a payload, with everything else left out:

{
  "id": "req-1",
  "device": {
    "sua": {
      "model": "Pixel 8"
    }
  }
}

Version history

Added in OpenRTB 2.6-202204, and present in the latest snapshot. The table shows how each version's spec text types the field.

Versions	Type in the spec	Required	Deprecated
2.6-202204	Added in the first 2.6 release, published without a structured text archive; the 2.6-202210 republication is the first tagged text.
2.6-202210 to 2.6-202606	string	No	No

Related fields

Other UserAgent fields

For a walkthrough of the whole object, read User-agent client hints and sua.