It's rare that a single feature in a tech product can generate a week's worth of headlines. But that's what happened when OpenAI CEO Sam Altman unveiled Sky, one of five voices that read out ChatGPT-powered answers.

In common with many listeners, Scarlett Johansson recognized the voice as hers. Which was strange, Johansson said in an equally rare statement Monday, since Altman contacted her multiple times asking her for permission to use her voice, including once just a few days before the...

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