A little outdated, though. I consider them to have renamed the model, since there's no such model as ChatGPT available via API and the docs now explicitly mention gpt-3.5-turbo is the model name (again with no mention of ChatGPT). You have Chat mode in the Playground, but no model like that. And in ChatGPT interface itself they say things like "based on old gpt-3.5-turbo model".