Fable 5's chain of thought has leaked, showing math-like shorthand, while its three-layer defense classifiers block most jailbreak attempts.

Looking for help with today's New York Times Pips? We'll walk you through today's puzzle and help you match dominoes to tiles ...

OpenAI relaunched Codex as a desktop app in February. It’s now used by 5 million weekly active users. ChatGPT is about to get ...

These short anomaly-detection puzzles are designed to illustrate how reasoning often depends on identifying inconsistencies ...

GPT-5.6 was already running in Codex for some users before OpenAI’s government-approved preview opened to partners. A ...