Introducing Ninja AI: A generalist agent for solving tasks in the browser
Ben Toth
on
July 18, 2025
We are excited to introduce Ninja AI - an AI agent that can solve tasks using its own web browser and other tools, such as Google, Perplexity, and a web scraper.
Try it now for free at Ninja.new
The browser makes it possible for Ninja to complete complex tasks using multiple apps or websites. It can think, reason, and execute tasks in steps, check itself, and change direction if it feels like it.
We are looking forward to getting users’ feedback and learning about Ninja’s strengths and weaknesses. During the beta version, usage of Ninja is extremely cheap. We’re giving 200 free daily credits to all users, a one-time sign-up bonus of 500 credits, and Molin Scale customers automatically get a Ninja Plus plan allowance.
Collaboration with Ninja (interruptions finally work)
Traditionally, tools like ChatGPT can’t be interrupted mid-reply – you have to stop, edit, and resend the message. However, that’s not how humans work. We don’t restart conversations; we simply correct ourselves within the context or give extra information.
That’s why we built Ninja to be collaborative.
Whenever Ninja is working on a task, you can jump in at any moment – clarify, change direction, or add more details. No need to restart. Ninja listens, adjusts, and keeps going, just like a real teammate would.
Some events are better handled by a human for now, for example, entering login credentials, confirming a payment, or solving a captcha. That’s why you can jump in any time and take control of the browser.
Browser session persistence
Ninja’s browser comes with built-in session management, so it behaves just like a regular Chrome browser. When Ninja logs into a site or dashboard, it stays logged in for as long as the session remains active, so you don’t have to re-enter credentials every time.
This means tasks that require access to the same account or system can be completed much faster. It also reduces the number of steps Ninja has to take, reducing the use of credits per task.
Models
Ninja is built to be model agnostic, today its primary model is Anthropic’s Claude Sonnet 4 and it’s also using models from OpenAI and Mixtral for some operations. We’re experimenting with smaller models too which can significantly decrease the running costs in the future.
Examples
Shop Management - Let Ninja manage your shop's orders, customers, support on autopilot.
Competitor Analysis - Ninja can automatically analyse your competitors' prices, campaigns, ads and much more.
Inbox Management - Ninja can manage your inbox, filter spam, send replies, schedule meetings and much more.
Say Hi - if you read this far!
If you read this far, thank you for your interest! If you have any questions or just want to talk to us - ping us at hey@molin.ai or X (Twitter).
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