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Open-world evaluations for measuring frontier AI capabilities

Sayash Kapoor · 16 Apr 2026

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  1. App store operators should prepare for and police spam submissions, as they might soon see thousands of applications submitted autonomously using agents.
  2. But whatever is precise enough to benchmark is also precise enough to optimize for, and modern RL training runs increasingly resemble the shape of the benchmarks themselves.
  3. Average performance is very different from upper-bound capability elicitation. Trying to run dozens (or 100s) of tasks in a benchmark suite is only necessary to measure average performance.

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