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Europe 2026

Anthropic Workshop: Build Agents That Run for Hours — Ash Prabaker & Andrew Wilson

Ash Prabaker , Andrew Wilson

Overview

This talk explores the evolution of AI agents, focusing on enabling them to run for extended periods, from minutes to hours or even days. It details the challenges of long-running agents, such as context limitations and model judgment, and presents Anthropic's approach to overcoming these through model improvements and harness development. The discussion highlights how co-evolving models and scaffolding have led to more capable and autonomous AI systems.

Who should watch

Key takeaways

Notable quotes

*The frontier doesn't really shrink, it just moves.*
*It's very easy for me to critique a lovely piece of artwork or a fine meal, much harder for me to actually go ahead and like paint that or cook that meal myself.*
*The lesson isn't necessarily our harness was wrong, but rather it was right for 4.5, the frontier moved, and we ran a simplified version to see how it worked.*

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Unofficial community note. Prefer the recording for nuance.