ISTANBUL A new investigation led by Norway’s public broadcaster NRK, together with 21 other public media organizations, has found that large language model–based assistants, including ChatGPT, Copilot, Perplexity, and Gemini, produced significant factual or sourcing errors in nearly half of their news-related responses. According to a report published on Wednesday by NRK Beta, 45% of all answers contained at least one major mistake. The most frequent issue was incorrect or missing citations,