OpenRouter Launches Subagent Tool for Mid-Generation Task Delegation

OpenRouter

Jun 13, 2026

OpenRouter launched the Subagent server tool, allowing models to delegate focused tasks to smaller, cheaper, faster worker models mid-generation. The orchestrator model invokes the tool with a task description, and the worker executes the task independently. Workers can optionally run as sub-agents with their own tools, such as web search, to ground results in fresh sources.

The openrouter:subagent server tool lets a model delegate self-contained tasks to a smaller, cheaper, faster worker model mid-generation. When your model has a piece of work that doesn't need its full capability — summarizing a document, extracting structured data, drafting boilerplate, reformatting text — it invokes the tool with a task_name and a task_description. The worker model executes the task and returns its result as the tool's outcome, and your model continues, integrating the result. — OpenRouter subagent tool implementation enabling models to delegate specific tasks to smaller, faster worker models mid-generation.

View the full update on openrouter.ai

OpenRouter

@OpenRouter1d ago

New server tool: Subagent 🤖 Your model can now delegate focused sub-tasks to a smaller, cheaper, faster model mid-generation. The big model orchestrates, the subagent executes. The subagent can use any model on OpenRouter. https://t.co/URBg4hL44O

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