Comment by orwin

If I can reassure you, if your project is complex enough and involve heavy data manipulation, a 30% improvement using Opus/Gemini 3/codex 5.2 seems like a good result. I think on complex tasks, Opus 4.5 improves my output by around 20-25%.

And since it's way, way less wrong than sonnet4, it might also improve my whole team velocity.

I won't lie, AI coding has been a net negative for the 'lazy devs' on my team who don't delves into their own generated code (by 'lazy devs' here I mean the subset of devs who do the work but often don't bother to truly understand the logic behind what they used/did. They are very good coworkers, add velue and are not really lazy, but I don't see another term for that).