OpenAI released GPT-Realtime-2, a voice model with GPT-5-class reasoning, tool use, interruption handling, and extended context windows up to 128K tokens, achieving top scores on Big Bench Audio and Conversational Dynamics benchmarks. They also launched a Chrome plugin for Codex enabling browser control and multitasking, and introduced GPT-5.5 with Trusted Access for Cyber for secure defensive workflows and red teaming.

Anthropic introduced Natural Language Autoencoders for interpreting model activations as human-readable text, aiding interpretability and debugging, while Goodfire proposed a neural geometry research agenda focusing on manifolds as primitives for neural network behavior. Anthropic also announced The Anthropic Institute to advance AI safety and economic resilience research.