This might be technically correct, in the sense that I think these companies have their own LLMs they're pushing? They're not literally using OpenAI's GPT model. But all LLMs are vulnerable to this, so it doesn't practically matter if they're using specifically GPT vs something in-house, the threat model is the same.
This might be technically correct, in the sense that I think these companies have their own LLMs they're pushing? They're not literally using OpenAI's GPT model. But all LLMs are vulnerable to this, so it doesn't practically matter if they're using specifically GPT vs something in-house, the threat model is the same.