Chinese artificial intelligence start-up DeepSeek has quietly released DeepSeek-V4-Pro-0813, an updated version of its latest flagship model, leaving some developers underwhelmed by its overall capabilities and disappointed in its pricing – but impressing researchers in niche areas like cybersecurity. The stealth update to April’s preview version came with a brief statement on DeepSeek’s official website on Wednesday, noting that the model offered “significantly enhanced agent capabilities”, but...