Comment by comex

Presumably yes. It is safe to assume that algorithms running the model changed, the training procedures changed, and the scale changed. Unfortunately the AI companies refuse to disclose the details of any of this, which is a harm to human knowledge (hopefully a temporary one). Yet the results speak for themselves.

For me it's only been in the last month with Opus 5.5 that I've been seeing code quality I actually respect (though this is with substantial human effort in the loop). Though this experience is from work where I don't have access to non-Anthropic models, nor Fable.