What is psychopass season 4?

As an AI language model, I don't have access to information that hasn't been released officially yet. However, as of now, there has been no official announcement about the release of Psychopass season 4. The third season of the popular anime series aired in 2019 and left audiences with a cliffhanger ending, leading many fans to speculate about the potential for a fourth season. While nothing has been confirmed, it's possible that fans could see a continuation of the story in the future.