What's happening
Microsoft will switch on Anthropic's Claude models by default for UK Copilot customers from 9 December, The Register reported.
What changes for organisations
UK organisations that haven't picked a setting by that date will have Claude enabled. Administrators can still turn it off, so this is a default preference rather than a forced migration.
The data-processing angle
Anthropic processes this data in the US. That detail matters for UK organisations that are sensitive about data localisation and cross-border transfers when deciding how to configure Copilot.
Why it matters
Microsoft making a second model provider a default in Copilot signals growing model diversity in enterprise AI. Organisations should review their settings before 9 December, both for model choice and for data-processing terms.
