How does the advisor tool work?

The executor model (Sonnet or Haiku) calls the advisor (Opus) when it encounters complex decisions, receives guidance, and then continues its task, keeping most operations cost-effective.

How can I activate the advisor tool?

Activate it by adding the advisor tool to the tools array in a Messages API request with the appropriate configuration, such as specifying the model as claude-opus-4-6.

Can the advisor tool be used with other tools?

Yes, it composes with other server-side and client-side tools by including them in the same tools array.

Is there a limit to advisor calls?

There is no built-in cap; to limit calls, manage them client-side by counting and removing the tool from the array when necessary to avoid errors.

Claude Advisor tool

Pair Opus as advisor with Sonnet or Haiku as executor

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What is Claude Advisor tool

Claude Advisor tool is a feature that enables developers to pair Claude Opus, a high-reasoning model, as an advisor with Claude Sonnet or Haiku as executors via the Messages API. This allows for the creation of AI agents that access advanced reasoning capabilities while keeping operational costs low by using smaller models for most tasks. It is designed for developers and organizations building cost-effective and intelligent AI agents.

Key Features

Cost-effective AI agent development by leveraging Opus only when needed for complex reasoning.

Easy integration through the Messages API with simple configuration in the tools array.

Compatibility with other tools, allowing seamless composition in AI agent workflows.

Performance improvements on benchmarks such as SWE-bench and Terminal-Bench.

Use Cases

Developers creating AI coding assistants that require high-level problem-solving guidance.
Businesses building customer service bots with intelligent escalation to advanced models.
Research institutions implementing AI for data analysis with optimized model usage.
Startups developing automated decision-making systems that balance cost and intelligence.

Why do startups need this tool?

Startups need the Claude Advisor tool to build sophisticated AI agents without the high costs associated with running large models continuously. It allows them to allocate resources efficiently, enabling rapid innovation and scaling of AI-driven applications. This tool is essential for startups looking to leverage advanced AI capabilities while managing operational expenses.