This is exactly my sentiment. Sonnet-3.5-latest was the perfect code companion: wrote just the right amount of okay quality code but its strength was it really tried to adhere to your instructions. sonnet-3.7 was the exact opposite, wrote waaay too much code and overengineered things like crazy while having very poor instruction adherence. Gemini 2.5 Pro is basically what I hoped sonnet-3.7 would be: follows instructions well but still softly opinionated, massive (usable) context window, fast response, more biased towards latest best practices and a up to date knowledge cutoff.

I'm wondering how much gemini 2.5 being "amazing" comes from sonnet-3.7 being such a disappointment.