A year+ ago, LLMs worked nearly as good as they work today.

I say this as someone that uses LLMs on a daily basis. It is a moderately useful tool for software development, but it was already useful in January 2025 (to pick a random date). Check what models were available by then. There were improvements since them, but they were mostly marginal.

The thing is, ever since ChatGPT 4 days there are people claiming on a daily basis exactly what you are claiming now, and it feels pretty silly. Sometimes it's hard to not imagine the accounts breathlessly claiming 100x productivity as bots.

In other words, I presume that if you are 100x more productive now, you were a 1/100x developer before LLMs. I actually question the capabilities of anyone making claims like that.