#frontier safety

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A rack of sandboxed task-runner servers in a bright lab, one drive tray's status light still amber mid-task while the trays around it glow steady green

What Claude's Capability Evaluations Actually Measure

A benchmark score is not a fact about a model; it is a fact about a harness, a threshold, and a moment in time. Here is what actually goes into an Anthropic capability evaluation, who checks it from outside, and why a single leaderboard number still misleads.

By Brecht Corbeel · August 11, 2026 · 17 min read

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