Since attribution isn't possible in ChatGPT, we'll never know. It's a great way to avoid all IP claims via plausible deniability. This topic has been beaten to

Since attribution isn't possible in ChatGPT, we'll never know. It's a great way to avoid all IP claims via plausible deniability. This topic has been beaten to death though, and it isn't changing. Companies have little incentive to have explainable AI since it would open them to infringement claims.