WorkThe story, in brief
Why language models hallucinate
OpenAI's new research explains the root cause of hallucinations—and how better evals could fix them.
The KeyNews take
Why it matters
Understanding why language models hallucinate is foundational to building trustworthy AI systems. OpenAI's research into evaluation methodologies directly impacts how companies approach safety and reliability in production deployments.
The key facts
4 to knowOpenAI published research on hallucination mechanisms in LLMs
Study connects improved evaluations to enhanced AI reliability, honesty, and safety
Published September 5, 2025
Addresses fundamental safety and trustworthiness governance question
Go to the source
OpenAI Blogopenai.com
Publisher excerpt: OpenAI’s new research explains why language models hallucinate. The findings show how improved evaluations can enhance AI reliability, honesty, and safety.