Vectorize Breaks 90% on LongMemEval with Open-Source AI Agent Memory System

Hindsight achieves 91.4% accuracy, validated by research with collaborators from the Washington Post and Virginia Tech

BOULDER, Colo., Dec. 16, 2025 /PRNewswire/ -- Vectorize today released Hindsight, an open-source memory system for AI agents that, for the first time, surpasses 90% accuracy on LongMemEval, the leading benchmark for evaluating long-term AI memory. Hindsight achieved a score of 91.4%, validated by research with collaborators from Vectorize, The Washington Post and Virginia Tech.