Perceived Drop in GPT-5 Quality Over the Last Few Weeks

I’m trying to work around this by using Gemini through the API, but the API cost is extremely high. Gemini is very efficient for generating long documents, especially when the goal is to produce structured written content. However, I would not recommend it for coding tasks. In my experience, it often creates things outside the original request, such as unnecessary scripts, simulations, mock data, examples, or illustrative implementations instead of strictly following the instructions. For document generation, it can be useful, but for code-related work, this behavior creates additional problems because I then have to spend extra time correcting or removing things that were never requested.