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Nvidia shows AI harness, not just model, key to mastering long tasks with perfect benchmark score

Market News
21 Aug 2026
TechCrunch
View Source
Bullish
Nvidia shows AI harness, not just model, key to mastering long tasks with perfect benchmark score

Nvidia's new research reveals that the software harness controlling an AI model is more crucial than the model itself for completing complex, long-horizon tasks. By using a custom harness with a supervisory component, Nvidia's Claude Opus 5 AI achieved a perfect 100% score on the ARC-AGI-3 interactive reasoning benchmark, far surpassing other models including OpenAI's. This harness manages memory, context, and feedback, acting like a CEO guiding the AI to avoid dead ends. Nvidia's findings highlight that open, customizable harnesses can significantly improve AI accuracy and reduce costs, suggesting future AI development should focus on the entire agent system, not just the model.

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