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Browser Use

DEVOPS
Velocity2.5

Browser Use opens BU Ultrafast to every US plan, free tier included

browser agentsagent speedv4 platformfree tierown models
◆Current state
BU Ultrafast is now on every Browser Use Cloud plan in the US, including free, and its waitlist has closed. It is selected by setting model to bu-ultrafast on POST /api/v4/runs and takes no model parameters, while bu-fast runs the same agent with more reasoning per step. The entry gives no speed or price figures. It is the first feed entry since the August 23 consolidation release, which brought single-request V4 session opens, paged transcripts and a correction to BYOK cache-read billing.
◆Where it's heading
Speed is becoming a setting the caller picks: bu-ultrafast and bu-fast are one agent at two reasoning depths. That follows the August work, where X402 metering made the browser open the billable unit and scheduling let agents run unattended. A parameterless model on the free plan also gives new users a simple way to try the V4 runs endpoint.
◆Prediction
The US-only wording is the visible limit, so availability elsewhere is the next step to watch. How BU Ultrafast is priced beyond the free plan is not something this entry settles.

◆Recent moves

  1. 15d ago

    BU Ultrafast Is Live

    BU Ultrafast moves from waitlist to every US plan, free included, with bu-fast as the same agent reasoning more per step. It widens access to Browser Use's own model line after a run of August releases on pricing and unattended operation; the entry gives no performance figures.

    View source ↗
  2. 2mo ago

    Faster Sessions, BYOK Pricing Fix & Reliability Updates

    A consolidation release after two directional weeks: single-request V4 session opens, paged streaming for large shared transcripts, and automatic recovery for backgrounded session tabs. The BYOK billing fix restores price parity between the bring-your-own-key and managed paths, which is the assumption the August 9 metering change depends on.

    View source ↗
  3. 2mo ago

    Scheduled V4 Agents, Agency Skill & Model Picker Updates

    ⚡ SPARK

    Scheduling plus the Agency skill moved Browser Use from on-demand runs to standing automation, and set the autonomy bar that the following week's reliability work has to meet. Agents running unattended between sessions are what make background tab recovery and paged transcripts load-bearing rather than cosmetic.

    View source ↗
  4. 3mo ago

    X402 micropayments, free session management, and shared sessions

    ⚡ SPARK

    The X402 release made the browser open the billable unit and freed everything done inside an already-open session. It is the reason a BYOK cache-rate bug two weeks later was worth its own changelog line - parity between the managed and bring-your-own paths is what that pricing model assumes.

    View source ↗
  5. 3mo ago

    Recording Controls & OAuth Browser Access

    Recording became a caller-controlled setting rather than an always-on default, with an explicit value overriding the client default and inheriting across follow-up runs on the same browser. A read scope for existing browsers joined the OAuth terminal flow - both small API-surface concessions to programmatic callers, ahead of the summer's metering work.

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  6. 7mo ago

    BYOK, Code Mode & Sensitive Data

    BYOK, Code Mode and secret handling arrived together as cost and control options on V3 sessions. BYOK becomes load-bearing later: it is the path whose cache pricing the August 23 release had to correct.

    View source ↗