DATA-RETENTION

Free tiers are where training happens: Google's unpaid quota outside the EEA, Switzerland and the UK, Mistral's Free mode, and some OpenRouter free models. Paid APIs mostly say no. Retention is a separate question, and four providers' own docs disagree with themselves.

Claude Fable 5 mandates 30-day data retention on every platform, overriding Zero Data Retention contracts. What compliance teams should audit before deploying.