Sonnet 4.6, Now Live in Harvey

This post announces the integration of Claude Sonnet 4.6 into Harvey's multi-model AI platform. It details Sonnet 4.6's performance on the BigLaw Bench evaluation suite (87.6% score, 35% perfect scores) and highlights its strengths in numerical precision, thoroughness on ideation tasks, and root cause analysis in code. It also notes a behavioral observation: Sonnet 4.6 is precise with explicit instructions but less so with implicit ones, especially for multi-document synthesis.