Disagree that the difference between GPT-4, 4o, and o1 is minuscule. Each version was a massive leap in functionality in terms of its capability to write code. I’m an experienced developer of 20 year and presently a CTO of a startup and I use it as my pair programmer every day. It’s effectively at the level of mid level developer now. It doesn’t get everything right first time but neither does a professional dev. If you work with it incrementally you can get amazingly fast results. It’s significantly improved my productivity. The reason there is so much investment in AI is because it’s going to significantly shake up white collar jobs.