Claude is now adopting the advisor strategy

We're bringing the advisor strategy to the Claude Platform. Pair Opus as an advisor with Sonnet or Haiku as an executor, and your agents can consult Opus mid-task when they hit a hard decision. Opus returns a plan and the executor keeps running, all inside a single API request. This brings near Opus-level intelligence to your agents while keeping costs near Sonnet levels. In our evals, Sonnet with an Opus advisor scored 2.7%age points higher on SWE-bench Multilingual than Sonnet alone, while costing 11.9% less per task.