The release will continue through the week. The company said it's not yet available in EU countries, Iceland, Liechtenstein, Norway, Switzerland or the U.K.
OpenAI announced the new capability in May. The rollout got plenty of publicity because of a voice called Sky that resembled that of Scarlett Johansson in the 2013 movie "Her." Legal counsel working on behalf of Johansson sent OpenAI letters claiming the company didn't have the right to use the near-identical voice, and OpenAI paused using it in its products, CNBC reported.