Stagehand won the browser toolset test for Deep Agents
The point
LangChain compared seven browser toolsets for Deep Agents and picked Stagehand from Browserbase. On WebVoyager, Stagehand passed 90 percent of tasks for $1.98 total, while Playwright MCP passed 78 percent for $26.71.
Why it matters
For builders, tool design drives browser agent cost and speed more than model choice alone.
Key details
- Stagehand run averaged 10 steps per task against 26 for Playwright MCP, with far less context returned per navigation
- Fixing page waits cut median HardBench time from 182 seconds to 124 seconds, with accuracy within noise
Original ~8 min → 25 sec here Source: LangChain Blog, Nov 3, 2026