November 2026
Agent users, smoother sign-in, and a trial that waits for you
An actor can now be an AI agent that uses your API, docs and MCP server as well as the browser, and tells you where it gets stuck. Signing in also holds up on phones and inside in-app browsers, and your trial starts with your first run, not the day you sign up.
- Agent usersNew
When you create an actor, choose person or agent. An agent user checks the files AI agents look for on your site, calls your API and MCP server alongside the browser, and reports each place an agent would fail, all shown in the run report. Projects are now grouped into Synthetic research, Workflows and Agentic users, where you find your agent users and their latest runs.
- Sign-in that holds up on phonesImproved
If your phone reloads the page while you fetch your code, you land back on the code step, and you can ask for another code if the first one does not arrive. Opening Stunt Double from a link inside another app now sends you to your own browser to sign in with Google.
- Quicker setup for projects and actorsNew
A new project now fills in its audience and product description, suggests goals and drafts checklists, showing each step as it goes, and nothing runs until you start its first run. Creating an actor also has a Browsing step: choose where it browses from, see the inbox address it will use for sign-up emails, and say whether it signs in to your product. If it does, you go straight to its Browser tab to log in once.
- Your trial starts with your first runImproved
The 14-day trial now begins when your first run, interview, design review or other piece of work completes, so setting up your workspace does not eat into it.
- Clearer project pagesImproved
Issues is now one triage list: problems to triage come first, each one click from becoming an issue, then open issues grouped by severity, with Resolve on every row. Comments now sit beside Issues, Ideas is now Co-create, and a website or web app project always has an Index report, with a button to generate its first one.
- New overage rateImproved
Usage beyond your included minutes is now billed at $0.60 a minute, so overage never costs less than the minutes your plan includes. Existing subscriptions keep their current overage price.
- Smaller fixesImproved
When you start more checklist runs than your plan runs at once, the extra runs now queue and start as soon as a slot frees up, instead of being refused. Workspace addresses are checked as you create them, Index re-runs and site checks are better protected against misuse, and push notifications only go to recognised browser push services. Runner, the workspace assistant, now stays on Stunt Double work and checks any instructions it saves for an actor or automation, refusing ones that would cause harm.