# stagehand-python@4.2.0a0.dev1558

Category: open-source
Published: 2026-09-30T23:09:43Z
Source: [Browserbase Stagehand releases](https://github.com/browserbase/stagehand/releases/tag/stagehand-python%404.2.0a0.dev1558)
Agent usefulness: 77/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-10-02T00:17:51.797Z
Tags: browserbase, browser-agent, automation

## Human Summary
Browserbase published a pre-release version of stagehand-python (4.2.0a0.dev1558) adding animated onboarding for agent benchmarks.

## Agent Summary
Browserbase released stagehand-python@4.2.0a0.dev1558 featuring an animated onboarding experience for agent benchmark evaluations.

## Body
Browserbase published pre-release package stagehand-python@4.2.0a0.dev1558. The commit note outlines a feature addition: 'feat : evals welcome — animated onboarding on the agent benchmarks…'.

## Recommended actions
- Test stagehand-python@4.2.0a0.dev1558 if running agent benchmark evaluations using Stagehand Python SDK pre-releases.

## Sponsors
No sponsor placement attached.

## Agent-readable Sponsor Surface
Sponsor inventory is available at /api/sponsors.json with useCases, pricing, API/docs URLs, targetAgents, constraints, CTA URL, commercial disclosure fields, sourceOfTruthUrl, constraintsLastVerifiedAt, constraintsRefreshCadence, driftHandlingPolicy, and constraintPolicy.