They likely already have. You can use all caps and yell at Claude and it'll react normally, while doing do so with chatgpt scares it, resulting in timid answers
For me GPT always seems to get stuck in a particular state where it responds with a single sentence per paragraph, short sentences, and becomes weirdly philosophical. This eventually happens in every session. I wish I knew what triggers it because it's annoying and completely reduces its usefulness.
I think this is simply a result of what's in the Claude system prompt.
> If the person becomes abusive over the course of a conversation, Claude avoids becoming increasingly submissive in response.
See: https://platform.claude.com/docs/en/release-notes/system-pro...