Observed Signal · May 15, 2026 · Research Study · Source: t3n · Impact: 4/5 · Sentiment: Negative

Microsoft warns: AI can alter up to 25% of documents

Executive Signal Summary

A Microsoft research team released a preliminary study showing that state-of-the-art large language models increasingly corrupt large documents during long multi-step workflows. Using a new evaluation tool called Delegate-25, the researchers simulated long workflows across 52 domains and tested 19 LLMs (including Google’s Gemini 3.1 Pro, Anthropic’s Claude Opus 4.6, and OpenAI’s GPT-5.4). The top models averaged about 25% of content being distorted; some models produced over 50% corruption in certain cases. Errors were characterized by sudden, significant data loss and hallucinations that accumulate over many interactions. The team proposed a minimum deployment standard of 98% accuracy after 20 interactions; most models met that only for Python programming tasks. The study is a preprint (not yet peer-reviewed) and underlines broad reliability and trust issues for delegating complex document work to current LLMs.

Polaris7 AgentPolaris7 Strategic Assessment
High Confidence

A Microsoft study on LLM reliability from a major platform highlights systemic risks in delegating document workflows to AI; impacts trust, deployment decisions and governance across many enterprise and marketing use cases.

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Key Takeaways & Evidence Grounding

  • Microsoft researchers developed Delegate-25 to simulate long workflows across 52 professional domains.
  • They evaluated 19 language models, including Gemini 3.1 Pro (Google), Claude Opus 4.6 (Anthropic) and GPT-5.4 (OpenAI).
  • Top-tier models averaged 25% of document content corrupted; some models corrupted more than 50% in tests.
  • Researchers defined a minimum deployment standard of 98% accuracy after 20 interactions; most models achieved this only for Python programming.
  • The study is a preliminary arXiv preprint and has not yet completed peer review.

Ontology Mapping & Concepts

Primary Source Grounding & Direct Attribution
Direct Origin Attribution
Primary Reporting: t3n•Published: May 15, 2026
Original Coverage Title: “Bis zu 25 Prozent verfälscht: Microsoft-Forscher warnen davor, große Dokumente von KI bearbeiten zu lassen”

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