Earlier quoted context omitted.
Betting it was Claude. That's the only LLM that will stand up to me!
"Claude" is a big program that wraps a coding agent around a specific model. It would be the specific model that "stands up to you". I post this pedantry only because it may be helpful to you to realize this for other reasons.
I'll say though, I haven't tried the weakest model of Anthropic's but Opus and Sonnet will both push back more than I've seen another LLM do so. GPT was always trying to please me and Gemini was goofy. I'm surprised Gemini was the one that pushed back honestly!