Dynamically extend timeout of an active Sandbox
Vercel just made long-running AI agents actually viable. Extended sandbox timeouts unlock multi-step agentic workflows.
Why it matters
Vercel's new extendTimeout method removes a technical friction point for developers building chained agentic tasks and multi-step code generation—a direct enabler for the emerging agent-as-capability wave.
The key facts
9 to knowNew extendTimeout method for Vercel Sandboxes
Supports chained agentic tasks and multi-step code generation workflows
Pro/Enterprise plans: up to 5 hours runtime
Hobby plan: up to 45 minutes runtime
Timeout can be extended multiple times until plan maximum is reached
Published October 21, 2025
New extendTimeout() method for Vercel Sandbox
Supports chained agentic tasks and multi-step code generation
Multiple timeout extensions allowed until plan maximum
Go to the source
Vercel Blogvercel.com
Publisher excerpt: You can now extend the duration of a running Vercel Sandbox using the new method.extendTimeout This lets long-running sandboxes stay active beyond their initial timeout, making it easier to support workflows like chained agentic tasks or multi-step code generation that take longer than expected.…