I have no experience with Claud.ai vs ChatGPT but it's clear the underlying model has no issue with guardrails and this is simply an easily tweaked developer setting if you are correct that they are stricter on Claude.ai.
(The old Claude 2.1 was hilariously unwilling to follow reasonable user instructions due to "ethics" but they've come a long way since then.)
Both Gemini and Claude (via the API) have substantially tighter guardrails around recitation (producing output matching data from their training set) than OpenAI, which I ran into when testing an image text-extraction-and-document-formatting toolchain against all three.
Both Claude and Gemini gave refusals on text extraction from image documents (not available publicly anywhere I can find as text) from a CIA FOIA release
Not sure if they are tighter in other areas.
This week.
And you'd be wondering: "darn, where's that toughest, most obidient and smart Belgian malinois that just a few hour ago was ready to take down a Bin Laden?"