This sorta feels like some sort of mathematical or variable assignment bug somewhere in the stack - maybe an off-by-one (or more) during tokenization or softmax? (Or someone made an accidental change to the model's temperature parameter.)

Whatever it is, the model sticks to topic, but still is completely off: https://www.reddit.com/r/ChatGPT/comments/1avyp21/this_felt_... (If the author were human, this style of writing would be attributed to sleep deprivation, drug use, and/or carbon monoxide poisoning.)