How do I determine the latest iPadOS compatible with my iPad Pro A1673?

You appear to have (a now obsolete) first generation iPad Pro.

Not sure which iPad you have? Identify your iPad model.

As of 5 November 2025, here is a list of the highest version of iOS supported by the older models of iPad (for simplicity - “generations” are shortened to a number) that are restricted in their ability to be updated:

32-bit devices (obsolete)

iPad1 - iOS 5.1.1

iPad2, iPad3 and iPad mini1 - iOS 9.3.5 (WiFi Only models), iOS 9.3.6 (WiFi+Cellular)

iPad4 - iOS 10.3.3 (WiFi Only), iOS 10.3.4 (WiFi+Cellular)

64-bit devices

iPad Air1*, iPad mini2* and iPad mini3* - iOS 12.5.7

iPad Air2*, iPad mini4 - iPadOS 15.8.5

iPad5*, iPad Pro (9.7"/12.9" 1st generation)* - iPadOS 16.7.12

iPad6, iPad Pro 12.9" 2nd generation*, iPad Pro 10.5" - iPadOS 17.7.10

iPad7 - iPadOS 18.7.2

(*) obsolete

Newer models are all able to be updated to the current version - iPadOS 26.1, or optionally if running iPadOS 18.x to iPadOS 18.7.2

• iPad Pro 13" (M4/M5)
• iPad Pro 12.9" (3rd generation and later)
• iPad Pro 11" (1st generation and later + M4/M5)
• iPad Air (3rd generation and later + M2/M3)
• iPad (8th generation and later + A16)
• iPad mini (5th generation and later + A17 Pro)

16.7.12.

(262086)

You're very welcome.

First, you can look up your iPad by model number doing a search for it on this web page. Identify your iPad model - Apple Support

This user document is a good for checking the supported system version. Go by model and model year which in your case is 2016 and iPad Pro generation 1.

Complete List of iPads, release year and … - Apple Community