AI Daily Brief — 21 January 2026

A small but pointed Anthropic engineering note. Tristan Hume publishes “Designing AI-resistant technical evaluations” on the Anthropic Engineering blog — three iterations of the company’s performance-engineering take-home test, each defeated by the next Claude version, with explicit design guidance for tests that remain meaningful when candidates have AI assistance.

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• Anthropic Engineering — AI-resistant evaluations. Three iterations of the perf-engineering take-home, each defeated by the next Claude. Design guidance for tests that resist capable AI assistance. via Anthropic Engineering

Compiled by AI Feed’s editor from publicly reported announcements on 21 January 2026.