Claude’s AI chat service went offline for users in the UK and other countries on Tuesday 23 June 2026. Users encountered errors when they tried to start a chat. It earlier that day and reached everywhere. When users attempted to use it, the system produced incorrect outputs.
The team behind the service says they located the problem after checking the logs later on Tuesday. They are observing traffic while they apply a patch. They say the problem should resolve once they finish checking services are restored. People might try again after a short pause.