Nvidia just showed that the harness, not the AI model, is now the real hero

Nvidia research shows that AI agents can perform well, and not go off the deep end, through fine-tuning, even if the AI model isn't that great at the task. Nvidia published some interesting new research on Friday suggesting it’s the harness, more than the underlying model, that is far more important when asking an AI to do long-horizon tasks [1].

Sources

1. techcrunch.com · Nvidia just showed that the harness, not the AI model, is now the real hero Aug 21, 2026
2. nerdwallet.com · Mortgage Rates Today, Friday, August 21: A Bit Higher Aug 21, 2026

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