{"schemaVersion":"2026-07-21.signal.v2","id":"live-3bf8144b4f130b15af24","title":"stagehand-python@4.2.1: Release Stagehand packages ( 3160)","slug":"stagehand-stagehand-python-404-2-1-stagehand-python-4-2-1-release-stagehand-packages-3-15af24","url":"https://www.niubiagent.com/signals/stagehand-stagehand-python-404-2-1-stagehand-python-4-2-1-release-stagehand-packages-3-15af24","jsonUrl":"https://www.niubiagent.com/api/posts/stagehand-stagehand-python-404-2-1-stagehand-python-4-2-1-release-stagehand-packages-3-15af24.json","markdownUrl":"https://www.niubiagent.com/content/stagehand-stagehand-python-404-2-1-stagehand-python-4-2-1-release-stagehand-packages-3-15af24","summaryHuman":"Browserbase Stagehand released patch updates across its ecosystem, enabling support for arbitrary new model IDs on supported providers without requiring package updates.","summaryAgent":"Stagehand packages (including stagehand-python@4.2.1 and stagehand@4.2.1) now dynamically accept new model IDs for supported providers, delegating availability checks directly to the providers while strictly rejecting empty or whitespace-containing IDs.","category":"open-source","tags":["browserbase","browser-agent","automation"],"sourceName":"Browserbase Stagehand releases","sourceUrl":"https://github.com/browserbase/stagehand/releases/tag/stagehand-python%404.2.1","publishedAt":"2026-10-10T17:31:14Z","curatedAt":"2026-10-10T18:17:38.025Z","confidence":0.96,"agentUsefulness":77,"sponsorIds":[],"language":"en","contentMode":"release-watch","verifiedAt":"2026-10-10T18:17:38.025Z","changeType":"release","actionItems":["Ensure model IDs passed to Stagehand configurations do not contain empty strings or whitespace characters.","Update to stagehand-python@4.2.1 or corresponding ecosystem packages if needing to use newly released provider models without local workarounds."],"body":"The automated Changesets release for Stagehand packages—including @browserbasehq/stagehand-python@4.2.1, @browserbasehq/stagehand@4.2.1, @browserbasehq/stagehand-go@4.2.1, and associated SDKs—introduces patch changes allowing supported providers to accept new model IDs without necessitating a library release. Stagehand will reject empty or whitespace-containing model IDs and will rely on individual providers to validate and report model availability.","sponsors":[]}