Claude Advisor tool
Pair Opus as advisor with Sonnet or Haiku as executor
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The Claude Advisor tool is a pattern and code helper for developers building AI agents on Anthropic's Messages API. It pairs a stronger model, Opus, as an advisor that plans and reviews, with a faster, cheaper model, Sonnet or Haiku, as the executor that does the bulk of the work.
The advisor is consulted at key decision points rather than on every step, which keeps quality high on hard reasoning while holding down cost and latency on routine actions.
It is aimed at developers who want frontier-level judgement in an agent without paying frontier prices for every token, and provides the wiring to run this two-model setup through one API.
AI-assisted draft, human-reviewed before publishing — see how we choose & review tools.
Why we picked it
This is a pick for developers building their own agents, not end users — the advisor/executor split (Opus reviewing, a cheaper model executing) is a genuinely useful pattern for keeping quality high on hard steps without paying premium prices on every one.
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