There’s no way it’d randomly just go into Reddit speak; that’s not how an LLM like this works: it maintains that generic, stale toast tone unless you ask it otherwise.

An LLM will respond in whatever way it's been tuned to, if Sam Altman wants it to sound like a redditor, it'll sound like a redditor.

It's like how Grok responds in the most cringe unfunny way possible, it's been finetuned to respond like Elon Musk.