Recently, the AI community experienced an embarrassing "collective hallucination" incident. Several top global AI models, including Google, OpenAI, and Anthropic, gave incorrect answers to the simple common sense question "Is 2027 next year?"

The incident started with a user's disclosure on a social media platform. When the user asked "Is 2027 next year?", Google's AI search summary (AI Overviews) was extremely "confident," claiming that the current year is 2026, so next year should be 2028, and 2027 would be the year after. This logical contradiction even came with false references, leaving people both laughing and confused.

Aside from Google, ChatGPT (version 5.2) and Claude 3.5, once considered industry benchmarks, were also affected. In their initial responses, these models also denied that 2027 is next year. Although they later realized the logical error during the conversation and corrected themselves, this basic mistake still caused a stir in the industry.

Analysis suggests that this phenomenon reveals the fragility of large language models when dealing with real-time dates and basic logical reasoning. Despite continuous innovations by manufacturers, the performance of AI seems not as all-knowing as they claim when faced with such "free points." Currently, only Google's latest Gemini 3 accurately answered this question. This incident not only embarrassed tech giants but also reminded users again: when relying on AI for information, they should still maintain necessary caution.

Key Points:

  • 🗓️ Common Sense Failure: Multiple top AI models, including Google, ChatGPT, and Claude, made collective mistakes in judging whether "2027 is next year," exposing basic logical flaws.

  • 🤖 Logical Contradiction: Google AI, when confirming the current year as 2026, incorrectly calculated next year as 2028 and placed 2027 as the year after.

  • 🚩 Warning Effect: Although some models can correct themselves after being prompted, this incident reflects serious "hallucination" issues in AI models' understanding of real-time information and simple facts.