Which one? The response wasn't clear on this - they could've meant gpt-4, or gpt-4-0314, or both. gpt-4-0314 is the "pinned" model that is not supposed to change, so I can believe it didn't change. gpt-4 is supposed to receive updates, so... are they saying it didn't?

Note that API users using Bring Your Own Key tools/chat frontends probably default to gpt-4, and not the pinned gpt-4-0314.