Shares of Baidu fell as much as 10 percent on Thursday after the web search company showed only a pre-recorded video of its AI chatbot Ernie in the first public release of China’s answer to ChatGPT. OpenAI’s release of ChatGPT last November had caught Baidu off guard, two people close to the company’s AI efforts said, noting they did not believe the US group had significantly superior technology until that point. Training ChatGPT took OpenAI more than a year, and it took them another year to tune GPT-4,” said one Baidu employee