GPT-4 is OpenAI’s latest language model. It’s more advanced than GPT-3.5 but is currently only available to ChatGPT Plus subscribers. GPT-4 can interpret images and process eight times as many words as previous models — 25,000 words at a time!. ChatGPT Plus is available for $20 a month in the US and other countries. If you’re traveling abroad, a US VPN helps you maintain access to your ChatGPT Plus account. Simply connect to one of CyberGhost’s 1307 servers in the US and use ChatGPT advice on your travels.. If you don’t want to pay or you live outside the US, you can still use GPT-3.5 for free.