Grok 4.6 made large gains on AA-Briefcase, our agentic knowledge work benchmark…

• benchmark — A standard public test set for comparing AI models — the shared scoreboards behind every "model X beats model Y" claim.
• AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.

Cost per task of $4.42 against $22.30 for a model with overlapping confidence intervals is the kind of price-performance datapoint that changes which model an agent pipeline is built on.

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