65% of Anthropic's product code is written by their internal Claude Tag…

Brief

Claude Tag is an Anthropic product — a Slack-integrated 'persistent coworker' that Anthropic says wrote 65% of its product code (including most of the code that built Claude Tag). Shipped publicly on 2026-06-23 for Enterprise and Team plans, it joins channels, builds ongoing context, handles async follow-ups, and was called the '3rd major redesign of LLM UX' by Andrej Karpathy.

Key details

Claude Tag was shipped publicly on 2026-06-23 and runs in Slack as a team member with access to chosen channels/tools; users can tag it to delegate tasks, it builds context from conversations over days, and it follows up asynchronously (no re-explaining, no separate window).

Available to Enterprise and Team customers only; Andrej Karpathy called Claude Tag the '3rd major redesign of LLM UX,' and the author flags potential consequences when teams that barely document anything turn this persistent coworker on.

65% of Anthropic's product code is written by their own internal version of Claude Tag. Including most of the code that built Claude Tag itself.

They shipped it publicly yesterday.

Tag Claude in a Slack channel, delegate work, walk away. It builds context from conversations over time and follows up async across days. No re-explaining. No separate window.

Karpathy called it the 3rd major redesign of LLM UX. A persistent coworker with your org's full context.

Enterprise and Team only. Curious what happens when teams that barely document anything turn this on.

Claude (@claudeai)

Introducing Claude Tag, a new way for teams to work with Claude.

In Slack, Claude joins as a team member with access to the channels and tools you choose. Tag Claude in and delegate tasks to it while you focus on other work.

Video

— https://nitter.net/claudeai/status/2069468693017268244#m

Brief

Why it matters

Key details