Frontier AI rewrites your documents during multi step edits and the damage is hard to detect

By the end it can silently corrupt a quarter

Microsoft researchers warn that “delegated work” with frontier LLMs can quietly degrade documents across long, iterative workflows. Using the DELEGATE-52 benchmark across 52 domains, they found top models corrupt about 25% of document content after 20 rounds. Worse, agentic tools and realistic distractor files increase errors, often via rare but massive distortions humans can miss.