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Browser Use Blog· Gregor Zunic·· 16 days agoFeaturedAI score60

BU Ultrafast is live

BU Ultrafast is live

AI summary

Browser Use has made BU Ultrafast, its fastest browser agent, available on every Browser Use Cloud plan in the US, including the free plan, after a waitlist period that ended Oct 30. The company reports a median task time of 22 seconds and $0.0064 per task for Ultrafast, versus 79 seconds and $0.0098 for its default agent on GPT-6 Luna, based on medians of completed runs from Oct 16-29, 2026. Users enable it by setting the model to bu-ultrafast, and bu-fast offers the same agent with more reasoning per step.

Why it matters

It gives concrete speed and cost benchmarks for a newly released browser agent and explains how to switch to it via the API.

Source: Browser Use Blog · browser-use.com