Here’s what probably happened. OpenAI people realize they can do TTS for ChatGPT so they hire some voice actors. Some people point out that it would be cool if it could be as good as it is in Her, especially with 4o on the way, so they decide to contact Scarlett Johansson either to do a voice or just some promotional thing. She declines, but after 4o is released OpenAI realizes they can fairly make the comparison to the movie based on the quality and speed of the voice. Simply subtly referencing the film via an obvious parallel doesn’t constitute deceptive impersonation.