I tried Cline with chatgpt 4.1 and I was charged - there are some free credits when you sign up for Cline that it used.

Not sure how you got it for free?

look up LLM7, and Pollinations AI. Both offer free GPT 4.1, but I am not sure how limited it is. They have tons more models but the names are different (openai-large = gpt-4.1)

Meta has free and generous APIs for the crappy Llama 4 models... they're okay at summarizing things but I have no idea if its any good for code. Prob not since no one even talks about those anymore.

GH Copilot is my guess. Not free, but $10 a month or free for students

Ahh I think this is mentioned in the blog post proper. Probably just ommited from the text comment.

Iwill try the free Windsurf tier using the prompts created and see if it can do it similar to 4.1