Researchers at Arizona State University found that Scarlett Johansson’s voice does indeed sound like “Sky,” OpenAI’s currently discontinued GPT-4o voice, according to NPR, which commissioned the comparison. After using AI models developed to analyze vocal similarities to compare Sky to roughly 600 other actresses, the lab reportedly found Johansson’s voice was “more similar to Sky than 98% of the other actresses.
For instance, the analysis reportedly showed that Sky’s and Johansson’s vocal tracts would have “identical” lengths . Some differences included that Sky’s voice was a little higher-pitched and more expressive than Johansson’s, while hers is “slightly more breathy” than that of the model, according to NPR. We asked Berisha for more information on his analysis and its limitations, and will update if he responds. OpenAI did not immediately respond to a request for comment.