It's weird, I use the standard "gpt-4" through the API and it's still stuck on September 2021. Annoying. According to the docs it's supposed to point to the latest version but it's never updated.
Ps I also tried gpt-4-turbo but the API rejects it for some reason. Same with the "numbered" ones listed in the documentation, I only seem to have access to the standard gpt-4 somehow.