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

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

These join GPT-4.5, which is still in testing, and GPT-4o, the default option for ChatGPT users. Naturally, I wanted to see ...

OpenAI’s newest reasoning models, o3 and o4‑mini, produce made‑up answers more often than the company’s earlier models, as ...

OpenAI has finally released the full o3 reasoning model along with o4-mini. New models can use multiple tools inside ChatGPT ...

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

Word to the wise, be careful about the images you post on social media. OpenAI's latest AI models, released last week, have ...

OpenAI is launching o3 and o4-mini, new AI reasoning models designed to pause and work through questions before responding.

OpenAI’s o3 and o4-mini models are available now to ChatGPT Plus, Pro, and Team users. Enterprise and education users will ...

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

Following the recent launch of a new family of GPT-4.1 models, OpenAI released o3 and o4-mini on Wednesday, the latest ...

On Wednesday, OpenAI announced the release of two new models—o3 and o4-mini—that combine simulated reasoning capabilities ...