I believe perfs of previous versions are worse because providers reallocate resources to newer versions. Also because of training data cut-off to previous years

I believe perfs of previous versions are worse because providers reallocate resources to newer versions. Also because of training data cut-off to previous years. This is what happened between claude sonnet 3.5 and 3.7. Personally I only use Claude/Anthropic and ignore other providers because I understand it the more. It's smart enough, I rarely need the latest greatest.