Multi-Agent Arena: Insights from London Great Agent Hack 2025

The Great Agent Hack 2025 focused on building trustworthy agentic AI through three distinct challenges centered on robustness, transparency, and user safety. The event's tracks included "Agent Iron Man" for creating high-performing, production-ready agents, "Agent Glass Box" for understanding agent behavior, and "Dear Grandma" for red-teaming and defense. Participants developed over 50 projects, with evaluation criteria including performance, architecture quality, and monitoring. One standout project was FairQuote, an intelligent car-insurance underwriting system using a multi-agent architecture to demonstrate robust enterprise workflows.