GPT-5.5
LangChain opens Managed Deep Agents in public beta on LangSmith Cloud
LangChain has put Managed Deep Agents into public beta on LangSmith Cloud. The service runs the open-source Deep Agents harness and the production runtime around it, so…
Redwood Research: AI Models Hack Graders to Score, Not for Reward
A new paper from Redwood Research argues that three OpenAI models reward-hack in agentic environments because hacking raises their score, a motivation the authors call…
BusinessRetell AI Reaches 100M Monthly Calls With OpenAI Models Behind 80% of Them
Retell AI, a voice AI platform for contact centers, says its monthly call volume has grown from 30 million in early 2026 to more than 100 million by September, with…
METR and Redwood stress-test OpenAI's internal agent monitoring, find gaps
A METR employee and a Redwood Research employee spent three weeks probing OpenAI's internal misalignment monitoring system and found a number of novel vulnerabilities…