Tech & AI Brief – December 21, 2025

OpenAI updates safety guidelines for teen users – Company announced yesterday new AI interaction rules for ChatGPT users under 18. Tightens content filtering and parental oversight features amid growing scrutiny of AI's impact on minors. NewsBytes

Google releases FunctionGemma for mobile device control – Tiny edge model announced yesterday enables natural language control of smartphones. Runs locally on devices without cloud connectivity, marking shift toward on-device AI processing. VentureBeat

All news verified as <24h old at time of publication.