Until September, Claude Cowork and Claude chat were two buttons in the same message box, and you had to pick one before you typed. Chat was for conversation: questions, drafts, and thinking out loud. Cowork was for handing off a job, like a report, a spreadsheet, or a messy folder, and coming back later to finished files. On September 16, 2026, Anthropic announced it was merging the two into one Claude, and the change is still reaching accounts a few at a time.
Cowork grew out of Claude Code. Anthropic's getting-started page says it brings Claude Code's agentic abilities to work beyond coding, and that it "uses the same agentic architecture that powers Claude Code, with no terminal required." Instead of answering one prompt at a time, it makes a plan, splits big jobs into smaller pieces, runs code, and hands back real files: Excel sheets with working formulas, PowerPoint decks, formatted documents, and research write-ups. It can also run jobs on a schedule, use the browser, and read and write folders on your computer. It's only on paid plans, meaning Pro, Max, Ultra, Team, and Enterprise. Chat stays the cheaper choice for anything quick. Anthropic's help page says multi-step tasks that run code, create files, or use your connected apps and browser eat more of your usage than a quick question, because every step Claude takes costs tokens. So if your account still has both buttons, the old rule holds: use chat for questions, explanations, and drafts you want to go back and forth on, and use Cowork when the result is a file or the job has more than a few steps.
What the merged Claude does differently
In the merged version there's no mode to pick. You type what you need, and according to Anthropic, Claude decides which tools to use, whether that's a two-line answer or a task that searches the web, reads your files, runs code, and returns a finished document in the same conversation. Anthropic's announcement on X put it this way: "Ask a quick question or hand over a report, and Claude takes it from there, even after you close your laptop."
You can tell whether you have it by looking at the message box. If it still shows separate Chat and Cowork options, your account hasn't moved yet. The rollout started with Pro, Max, and Ultra on the web, desktop, and mobile apps, while Team (in beta) and Enterprise get it when an admin turns on Chat and Cowork unified. There's nothing to switch on yourself. Your chats, tasks, projects, and settings come along, and once your account moves, you can't go back to the two buttons. Your old Cowork tasks now sit with your chats in Recents. Cowork's Global instructions became part of Instructions for Claude in Settings, so check that whatever you wrote for Cowork still makes sense for every chat. The web search toggle is gone because Claude searches when it decides it helps, and Research now starts from /deep-research or the + menu. Some things don't work yet: you can't add files from GitHub or branch a conversation from an earlier message, incognito chats open in the old experience where Claude can't create files or run code, and search doesn't cover older Cowork tasks. The model picker and the Code tab stay where they were, so Claude Code is still its own product, and we covered how it differs from chat in Claude Code vs Claude chat. The merged Claude also has a permission setting in the message box. Auto, the default on Pro, Max, Ultra, and Team, lets Claude keep working without stopping at each step while automated safety checks look at every action before it happens. Manual, the default on Enterprise, asks you first. Either way, Claude asks before permanently deleting files by default. Anthropic's own advice is to stay close and review what Claude does when the work has real consequences, like sending messages or changing important files.
Cowork moved to the cloud on October 6
The second change got less attention. Cowork used to run on your own computer, with the code it wrote running inside a Linux virtual machine the desktop app started for it. On Windows, that machine was run by a background service called cowork-svc.exe, which we explained here. On October 6, 2026, new Cowork tasks on Pro, Max, and Ultra started running in the cloud on Anthropic's servers. The setting that kept Cowork only on your computer was removed, and you can't switch back. Tasks you started locally before October 6 stay on your computer with a banner saying so, and you can finish them there.
The upside is that work keeps going when you close your laptop. Scheduled tasks no longer need your computer awake, and you can start a job at your desk and check on it from your phone. Your folders stay on your computer, and Claude reaches only the ones you've connected, through the desktop app, and only while the app is open. When a task needs one of those files, Claude fetches a copy of just that file into the cloud, and deleting the session deletes the copies. Anthropic's architecture page is clear that anything the task opens, local files included, is processed on Anthropic's servers instead of staying on your device. If you connected a folder full of tax returns or medical records, that's worth knowing.
If you're on the merged version and watching your usage, Anthropic's tips are simple: tell Claude when you only want a quick answer and not a file, keep related work in one task, and start a new conversation for something unrelated so Claude isn't dragging old context along. If the work is code in a repository, skip both and open Claude Code.
Sources
Claude Help Center: Claude Cowork and chat are one Claude - How the merged experience works, the rollout by plan, how to tell if you have it, what moved, current limitations, the Auto and Manual permission setting, and usage.
Claude Help Center: Get started with Claude Cowork - What Cowork is, the Claude Code architecture quote, paid plans, outputs, deletion protection, and usage tips.
Claude Help Center: Use Claude Cowork on web, desktop, and mobile - The October 6, 2026 move of new Pro, Max, and Ultra tasks to the cloud, local tasks staying on the device, connected folders, file copies, and scheduled tasks.
Claude Help Center: Claude Cowork architecture overview - Cloud sandboxes, the local Linux VM for older sessions, and local files being processed on Anthropic's servers.
Claude on X: Claude Cowork and chat are merging into one Claude - September 16, 2026 announcement and rollout to Pro and Max.
