Whats the actual knowledge cutoff date for gpt-4.1-nano?

Question

Deployed gpt-4.1-nano model and while doing some check it showed me data till Oct-2023. While asked the knowledge cut-off date, it showed me Oct-2023 as well.

But Azure OpenAI Service docs claim it's May 31, 2024. Which one is accurate?

And am I doing anything wrong here?

Attached SS for reference. date.png