I don't think others share that opinion, especially in the public sphere. GPT-{number} and ChatGPT are, for me, valid trademarks as they identify OpenAI's specific product; but somethingGPT is such a generic name at this point, and GPT such an alternate name for language-based AI, that it really doesn't identify OpenAI. (even ChatGPT is an alternate name for any chat AI at this point, but I feel it's fair that OpenAI doesn't let anybody else call their product "a ChatGPT" (I'm not too sure about trademark law but I think that leaves "a ChatGPT-like AI chatbot" open))