Announced in January 2026, Claude Cowork is already establishing itself as one of the most significant developments in AI assistants. Until now, most AI assistants operated on a simple model: the user asks a question, the AI answers, and the user finishes the work manually (copying text, transforming a spreadsheet, organizing documents, etc.) Claude Cowork changes that logic. The tool allows you to grant the AI direct access to one or more local folders on your computer. The AI can then organize a chaotic downloads folder, transform scattered notes into a structured document, or analyze data contained across multiple files. All you have to do is describe the goal.
This approach is directly inherited from Claude Code, a tool originally designed to help developers. But users had quickly repurposed it well beyond coding. As a result, Cowork was designed to make this way of working accessible to the widest possible audience, with no technical prerequisites.
Good to know: Claude Cowork is available on Windows and macOS, but for paying users only. Note also that tasks performed consume more credits than standard conversations. To get the most out of it, we’ve put together five practical tips.
Automate your repetitive tasks
Take a folder filled with meeting notes accumulated over weeks: Word documents, screenshots, PDFs sent by colleagues. The files often have inconsistent names. With Cowork, all you have to do is grant access to the folder and describe the rule to apply. Example: sort the files by week and by project, then rename them according to a clear format (for example, 03-2026-meeting-project-x). The AI then analyzes the documents, identifies the dates and themes, creates the necessary folders, and automatically renames each file. In a matter of seconds, a jumble of scattered notes becomes a structured archive!
Discover a new writing assistant
Cowork is not limited to file organization. The tool can also serve as a genuine document production assistant. A folder containing academic articles, interview transcripts, and internal notes can be analyzed as a whole. Claude identifies recurring themes, compares conclusions, and generates a structured report.
The same logic applies to corporate communications. From a quarterly report, the user can ask: « Create a ten-slide presentation for investors using the key figures and our brand guidelines. » Cowork extracts the data, drafts the content, and formats the document. Another major difference from standard assistants: tasks can be run in parallel. The user can assign several jobs to the AI and let them run successively, as if delegating to a colleague.
Pair it with Google Chrome
Paired with Claude in Chrome, Cowork can also interact with the browser. Through a dedicated extension, the AI can visit web pages, open tabs, click buttons, or fill out forms.
The use cases then become broader: browsing multiple sites to collect information, extracting data, unsubscribing from newsletters, or synthesizing content from different sources. Combined with access to local files, this system creates a continuous workflow between the internet and the user’s computer.
Use advanced plug-ins
A plugin is built on four elements: « skills » describing a task, « connectors » linking Claude to external services (Google Drive, Slack…), « slash commands » triggering an action within the interface, and specialized « sub-agents. »
Take the example of an e-commerce site. A plug-in could connect Claude to the product database and the logistics tool. By simply typing /new-product, the e-commerce manager could ask the AI to generate a complete product listing: retrieving technical data, drafting the description, and formatting it ready to publish.
Behind that command, Cowork orchestrates several operations in a local virtual machine, queries the connected services, and delivers the result directly.
This feature is highly advanced, and it has traditional software ecosystems worried. Why buy a SaaS tool for your business when you can recreate it yourself without writing a single line of code?
Proceed with caution
Giving an AI control over a local folder obviously raises security questions. Claude can theoretically perform destructive actions (such as deleting files) if the user requests it or if the instructions are ambiguous. Anthropic therefore recommends formulating very precise instructions. Another risk: « prompt injections, » those manipulation attempts aimed at influencing the actions of an AI agent through online content. The company states that it has put several protective mechanisms in place, but the security of autonomous agents remains an open challenge across the entire industry. So stay vigilant (approved sites, actions to be validated beforehand…)
Written in French by Zakaria Choukrallah, edited in English by Eric Nielson
