OpenAI's o3 swept xAI's Grok 4 in the final of an AI chess tournament. Hosted by Google's Kaggle, the tournament pitted general-purpose AI models against each other. The win adds to the ongoing public ...

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. A ...

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

OpenAI promised a one-model-fits-all future for ChatGPT. Instead, it backtracked—and the model choices are more confusing ...

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

Following this post’s publication, OpenAI co-founder and CEO Sam Altman announced the company would restore access to GPT-4o and other old m ...

ChatGPT-5 completed Pokémon Red in 6,470 steps, compared to 18,184 steps for GPT-o3 - but the best humans are still way ...

Openai is making O3 level capabilities open source ahead of the release of GPT-5 in about two days. These open source models ...

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.

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

With high effort, o3-mini achieves a performance comparable to o1. If you use o3-mini as an AI developer via an API, you get off cheaply: at 1.10 US dollars per million tokens, the model is ...

OpenAI saved its biggest announcement for the last day of its 12-day "shipmas" event. On Friday, the company unveiled o3, the successor to the o1 "reasoning" model it released earlier in the year ...