The findings show reasoning models aren't always more capable than non-reasoning ones, and the biggest safety gaps each company is grappling with.

Despite the company's name, OpenAI hasn't dropped an open version of its AI models since GPT-2 in 2019. That changed on Tuesday, as CEO Sam Altman shared two new open-weights, reasoning AI models, ...

The company has unveiled two new open-weight language models, gpt-oss-120b and gpt-oss-20b, marking the firm's first public release of freely available AI model weights since GPT-2 in 2019, long ...

OpenAI said on Tuesday it has released two open-weight language models that excel in advanced reasoning and are optimized to ...