AI hallucinations are common across various platforms and can lead to significant issues when content reaches public audiences. ChatGPT had the highest percentage of fully correct answers at 59.7%, while Claude was most consistent but slightly less accurate. Gemini performed well on simple prompts but struggled with complex ones, Perplexity excelled in fast-moving fields like crypto but had a higher error rate, Copilot provided brief safe responses lacking context, and Grok had the highest overall error rate at 21.8%. Multi-part prompts, recently updated topics, and niche-specific questions posed challenges for all models. Common red flags include broken or non-existent sources and answers to incorrect questions. Marketers should remain cautious and implement checks to prevent hallucinations from causing brand damage.
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