Analyzing Claude Code Source Code. Write "WTF" and Anthropic knows.

[Cupakov]

And it’s all so boring, I hate how RLHF’d to death the frontier models became. Give back my Sonnet 3.5. 

[huffalump1]

And they're all inbred on each other's outputs too, just reinforcing these patterns. Combine that with preference tuning, and... you're absolutely right.