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Gemini 3 Pro shows 88% hallucination rate when unsure, researchers find

A recent analysis of Google's Gemini 3 Pro model revealed a significant paradox: while it achieved a high accuracy rate of 53%, it also exhibited an alarming hallucination rate of 88%. This indicates that when the model encounters information it doesn't know, it is more likely to fabricate an answer than to express uncertainty. The report highlights the challenge of distinguishing between genuine knowledge and fabricated responses in advanced AI systems. AI

Summary written by gemini-2.5-flash-lite from 1 source. How we write summaries →

IMPACT Highlights the critical need for improved uncertainty quantification in LLMs to prevent the spread of misinformation.

RANK_REASON Research paper analyzing AI model performance and hallucination rates.

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Gemini 3 Pro shows 88% hallucination rate when unsure, researchers find

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  1. Mastodon — mastodon.social TIER_1 · [email protected] ·

    # AI hallucinates up to 88% of the time, when it doesn’t know an answer. 🙈 'The Gemini 3 Pro Paradox: Gemini 3 Pro achieved the highest accuracy (53%) by a wide

    # AI hallucinates up to 88% of the time, when it doesn’t know an answer. 🙈 'The Gemini 3 Pro Paradox: Gemini 3 Pro achieved the highest accuracy (53%) by a wide margin — but also showed an 88% hallucination rate. This means that when it doesn’t know an answer, it fabricates one 8…