OpenAI has released ChatGPT 5.1, featuring two modes: Instant for casual conversations and Thinking for deeper reasoning. The update also allows users to customize tone and style more precisely, improving user experience for both personal and brand interactions.

NVIDIA's Nemotron-H-8B-Base-8K is a large language model designed for text completion, featuring a hybrid architecture and a context length of 8K. It supports multiple languages and offers customization tools through the NeMo Framework for enhanced performance in research and development. The model is intended for use on NVIDIA GPU-accelerated systems and is part of the Nemotron-H collection, governed by specific licensing terms.