"According to research published today in Science, a new type of AI was able to solve certain types of CAPTCHA with up to 66.6 percent accuracy. To put this in perspective, humans can solve the same type of CAPTCHA with about 87 percent accuracy due to multiple interpretations of some examples and a CAPTCHA is considered broken if a bot can pass it 1 percent of the time."
https://motherboard.vice.com/en_us/article/wjgnjq/ai-vicarious-recursive-cortical-network-captcha
https://motherboard.vice.com/en_us/article/wjgnjq/ai-vicarious-recursive-cortical-network-captcha