# Anthropic moves Cowork session computers into the cloud

_Published Monday, October 5, 2026 at 8:20 PM EDT · AI · Latest · Tier 2 — Notable_

Anthropic has moved the virtual machine that executes Cowork's tool calls from users' computers into the cloud, Anthropic's Felix Rieseberg said. Model inference already ran in the cloud; the earlier design ran the virtual machine locally and stopped work when users closed their laptops.

Each session now gets a separate cloud sandbox that does not share state with other sessions. When it needs a file on a user's device, the desktop app handles that access. Rieseberg said the change addresses complaints about local disk use, battery consumption and performance.

## Sources

- [Simon Willison's Weblog](https://simonwillison.net/2026/Oct/5/felix-rieseberg/)

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Canonical: https://techandbusiness.org/newswire/iY8hJJZuxDLE6ezTh5KRIB
Published: 2026-10-06T00:20:46.543Z
Story chronology: 2026-10-05T23:56:47.000Z
Retrieved: 2026-10-06T02:03:31.337Z
Publisher: Tech & Business (techandbusiness.org)