Anthropic may frequently change its post-training stack, and mistakes in some models may create quirks that users dislike.

“something about the smaller anthropic models like Sonnet 5 though it's hard to predict exactly what what they're doing to post train those models it could also be that they're always changing their post training stack and they just made they just got a few things wrong in some of these models so they like I don't know they they turned up like so something too high and created some quirks that people really don't like”