The AI chess tournament between OpenAI’s o3 model and xAI's Grok 4 invited plenty of speculation as a kind of proxy battle between the two companies and their respective CEOs. Any comparison to the ...

One of the few things many disliked about ChatGPT was the confusing number of models. OpenAI claimed GPT-5 would fix this, ...

Danny McGee puts the DJI O3 Air Unit to the test, analyzing image quality, range, latency, and overall flight performance.

Ars Technica has been separating the signal from the noise for over 25 years. With our unique combination of technical savvy ...

ChatGPT Plus users not only get an improved GPT-5 experience that lets you pick from a few use cases, you also get some older ...

GPT-5 Pro, GPT-5 Thinking, and o3 to analyze my code repository - and found surprising differences in detail, reasoning, and ...

In a way, AI models launder human responsibility and human agency through their complexity. When outputs emerge from layers of neural networks processing billions of parameters, researchers can claim ...

After a rocky GPT-5 launch, GPT-4o is officially back for paying ChatGPT subscribers. OpenAI CEO Sam Altman also promised ...

OpenAI’s o3 has defeated xAI’s Grok in a chess match that took place on Google’s Kaggle platform. But what does it prove?

The o3 model scored 76% accuracy on ARC-AGI in an evaluation formally coordinated by OpenAI and the author of ARC-AGI, François Chollet, a scientist in Google's artificial intelligence unit.

Neither o3 nor o3-mini are widely available yet, but safety researchers can sign up for a preview for o3-mini starting today. An o3 preview will arrive sometime after; OpenAI didn’t specify when.