UPDATE: Apr. 16, 2025, 2:18 p.m. EDT Now that the OpenAI livestream has ended, this article has been updated with the latest information about the o3 and o4-mini launch. OpenAI's o3 and o4-mini models ...

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. o3 ...

Openai is making O3 level capabilities open source ahead of the release of GPT-5 in about two days. These open source models are trained for agentic workflows—supporting function calling, web search, ...

In a new paper from OpenAI, the company proposes a framework for analyzing AI systems' chain-of-thought reasoning to understand how, when, and why they misbehave.

OpenAI’s ChatGPT model is a closed AI model. This means that developers cannot tinker under the hood, and if they want to use it for their own purposes, they’d have to pay OpenAI for API access.

OpenAI has a new reasoning model called o3-pro that the company says is its most intelligent yet. On Tuesday the ChatGPT maker announced o3-pro on X, sharing some details on its improvement over o3.

OpenAI’s o3 defeated Elon Musk’s Grok 4 at chess Magnus Carlsen delivered biting commentary on the quality of Grok's logic Grok 4 made repeated blunders, while o3 played steady The AI chess tournament ...

OpenAI created a simple playground where developers can try both gpt-oss models in the browser. Image: OpenAI eWeek content and product recommendations are editorially independent. We may make money ...

OpenAI’s latest GPT-5 model dropped yesterday and it’s making big waves in the rapidly moving AI industry. GPT-5 is more than an upgrade. It aims to be a single, smarter system that blends reasoning, ...