OpenAI delivered advanced ChatGPT reasoning models this month that are more capable than o1, but they also hallucinate more.

OpenAI is streamlining its AI model lineup, retiring popular models like GPT-4 and GPT-4.5, all in anticipation of the launch ...

OpenAI's reasoning AI models are getting better, but their hallucinating isn't, according to benchmark results.

OpenAI says its latest models, o3 and o4-mini, are its most powerful yet. However, research shows the models also hallucinate ...

The FrontierMath benchmark from Epoch AI tests generative models on difficult math problems. Find out how OpenAI’s o3 and ...

By OpenAI 's own testing, its newest reasoning models, o3 and o4 -mini, hallucinate significantly higher than o1.

Historically, each new generation of OpenAI's models has delivered incremental improvements in factual accuracy, with ...

OpenAI's latest AI models tend to make things up — or "hallucinate" — substantially more than earlier versions.

If you’ve used an AI model, you’ve most likely seen it hallucinate. This is when the model produces incorrect or misleading ...

OpenAI's o3 and o4-mini models for ChatGPT have arrived.

Comparing AI reasoning abilities reveals OpenAI's o1 model surpasses DeepSeek's R1 in generating accurate, sentence-level ...

OpenAI introduced two new reasoning models this week: o3 and o4-mini. The company claims that these are its smartest AI ...