Anthropic's Advisor Strategy: Opus Intelligence at Sonnet Prices

Anthropic's Advisor Strategy lets Sonnet or Haiku consult Opus mid-task, keeping near-Opus quality at executor-level pricing Sonnet plus Opus advisor improved 2.7 points on SWE-bench Multilingual while cutting per-task cost by 11.9% Haiku plus Opus advisor than doubled BrowseComp scores from 19.7% to 41.2% while costing 85% less than Sonnet One API call handles everything with zero orchestration, the executor invokes the advisor like any other tool Best for agentic workflows where most turns are routine but a few critical decisions need frontier-level reasoning Running Claude Opus on every.