OpenAI's reasoning AI models are getting better, but their hallucinating isn't, according to benchmark results.

OpenAI’s o3 and o4-mini models are available now to ChatGPT Plus, Pro, and Team users. Enterprise and education users will ...

Vivian Meng and Katie Parrott in Context Window Was this newsletter forwarded to you? Sign up to get it in your inbox. If you’ve been following AI news this week, you may feel like a kid at ...

verl is a flexible, efficient and production-ready RL training library for large language models (LLMs). verl is the open-source version of HybridFlow: A Flexible and Efficient RLHF Framework paper.