My reason for believing that is that it was trained from scratch, and was not a fine-tuning or other optimisation of the existing GPT-4 model. We know this because OpenAI has publicly stated that they're using a different tokenizer, which would have forced them to start the model training from step one.
GPT-4o feels GPT5ish to me. It's crazy fast and doesn't make the stupid mistakes 3 and 4 did. Also it doesn't hallucinate nearly as much and its inference capability is impressive. I can be rather vague in my question and it typically understands what I am getting at.
I tried learning Godot with 4o for a few days and almost literally every answer was hallucinated and wrong. Didn't matter if I specified the version of Godot I was using among other specifics. It would even repeat mistakes that I had corrected earlier in the conversation (and it claimed to "save to memory").
Good to know. I did have it hallucinate pretty bad yesterday when I asked it about Microsoft AI Recall. After it kept telling me confidently about Outlook's AI ability to call back messages after being sent, I told it to search the internet on the topic and it came back with accurate data on Microsoft's new AI feature in Windows 11.
Right and I guess everyone forgot that there was a panic about GPT-5 taking over the world or something and Altman publicly declared they would not be released GPT-5 soon.