US Gov AI Vetting Pact, ChatGPT Upgrades to GPT-5.5 & Meta Copyright Lawsuit

Today on AI RADAR: **Top AI labs** agree to US Gov model vetting. **OpenAI** drops **GPT-5.5 Instant** with a **Memory Sources** feature. Plus, publishers sue **Meta** over Llama copyright infringement, and a look at Meta's "Hatch" agent & Subquadratic's efficiency claim.Sources:• Tom's Hardware: https://www.tomshardware.com/tech-industry/artificial-intelligence/google-microsoft-and-xai-agree-to-let-us-government-test-ai-models-before-public-release• VentureBeat: https://venturebeat.com/ai/gpt-5-5-instant-shows-you-what-it-remembered-just-not-all-of-it/• The Guardian: https://www.theguardian.com/technology/article/2026/may/05/major-publishers-sue-meta-for-copyright-infringement-over-ai-training• FT: https://www.ft.com/content/meta-plans-advanced-agentic-ai-assistant-for-consumers• VentureBeat: https://venturebeat.com/ai/miami-startup-subquadratic-claims-1000x-ai-efficiency-gain-with-subq-model-researchers-demand-independent-proof/