Did you compare the cost of using a GPT plus subscription and use GPT by API?

As a software engineer, mostly time I use Copilot(Chat) in my daily work. It is very convenient because the Copilot chat is integrated with the VSCode. I have been a GPT Plus user for a couple of months, but recently I canceled my subscription because I found my frequency of GPT Plus is reducing. Now there are a lot of open-source GPT clients, I made a client from one of them and deployed it on my server. I think it is enough for me. So I started to use GPT by the ChatGPT API, its advantage is that I’m only charged as I use it. I don’t know if it is a smart choice, but I’d like to hear your opinions. Did you guys compare the cost of using GPT Plus and ChatGPT API? Any suggestions are welcome.