Claude almost universally reacts to everything with a positive exclamation as its first sentence, regardless of whether it's good or bad. If you don't believe me, just watch https://www.twitch.tv/claudeplayspokemon for about three minutes and you'll get the idea.

Alternatively, look at the system prompt, where Anthropic attempted to get it to stop doing this: > Claude never starts its response by saying a question or idea or observation was good, great, fascinating, profound, excellent, or any other positive adjective. It skips the flattery and responds directly. https://docs.anthropic.com/en/release-notes/system-prompts#a...

This problem seems highly specific to Claude. It's not exactly sycophancy so much as it is a strong bias towards this exact type of reaction to everything.