I haven’t hear the GPT-4o voice before. Comparing the video to the video of Johansson’s voice in “her”, it sounds pretty similar. Johansson’s performance there sounds pretty different from her normal speaking voice in the interview - more intentional emotional inflection, bubbliness, generally higher pitch. The GPT-4o voice sounds a lot like it.
From elsewhere in the thread, likeness rights apparently do extend to intentionally using lookalikes / soundalikes to create the appearance of endorsement or association.