ChatGPT o3 hallucinates more than o1, and OpenAI has no idea why

As soon as ChatGPT became widely available, it stunned the world with its ability to answer questions in natural language almost immediately. It still does that today, and its performance has improved significantly as well.

However, users quickly discovered that chatbots like ChatGPT do not always provide accurate information. They convincingly hallucinate. That’s why I’ve been warning you about AI hallucinations since the early days of ChatGPT and routinely reminding you to ask for sources and check the facts the chatbot spews.

ChatGPT and its rivals have come a long way since then. OpenAI and other AI firms will give you sources for the claims the AI makes, especially when an internet search is involved. Despite those upgrades, I still have custom instructions telling the AI to give me clear, working links for everything it says. I still correct the AI when it says something incorrect.

Hallucinations will probably disappear in more advanced AI chatbots in the not-too-distant future. But it might take a while to get there. ChatGPT o3 and o4-mini are the best proof of that. They’re ChatGPT’s most advanced reasoning models, exceeding the performance of ChatGPT o1 in various fields.

Strangely, however, ChatGPT o3 and o4-mini are hallucinating more than their predecessors, and that’s something OpenAI admitted on its own. It’s unclear what causes that behavior.

Continue reading…

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ChatGPT o3 hallucinates more than o1, and OpenAI has no idea why originally appeared on BGR.com on Wed, 23 Apr 2025 at 15:50:00 EDT. Please see our terms for use of feeds.

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