Artificial Analysis Intelligence Index v4.2

Artificial Analysis released Intelligence Index v4.2, an interim update that introduces more complex, realistic evaluation tasks including AA-Briefcase for agentic knowledge work and GDP.pdf for long-form document reasoning, while doubling the proportion of private test sets to 40% to prevent model gaming. The update brings the benchmark closer to real-world use cases ahead of the planned v5 release, with the team planning additional incremental updates as the AI frontier rapidly evolves.