Claude Code Adds Advisor Tool to Cut Opus Costs While Maintaining Performance

Anthropic has made its Claude Code advisor tool widely available, allowing developers to pair Sonnet or Haiku as the main executor model with Opus as an optional consultant for complex decisions, reducing costs by roughly 12% while maintaining near-Opus quality. The feature, which launched in April 2026, activates via the /advisor command and lets the primary model autonomously decide when to request guidance from Opus—reading the full transcript to deliver focused recommendations without adding significant overhead.