Based on what? First commit seems to have been March 29th (https://github.com/xtekky/gpt4free/commit/fc995b874199ce985a...), with the express purpose of providing GPT-4 / GPT-3.5 access for free:
> # openai-gpt4
> Free gpt4 / gpt3.5 access through several reverse engineered api's (nat.dev, poe.com, t3nsor.com etc...)
And GPT-4 was announced by OpenAI 14th March. Also would be weird if the initial commit references things that haven't happened yet.
I'll say what I said before on earlier submissions about this very project, the naming is very obviously deliberately trying to confuse people to think they are using GPT-4 via that project, when they actually end up not using GPT-4. And judging by the authors comments here on HN, they have no intention of stop misleading people like this either. So good riddance.