DX Today AI Daily Brief - Sunday, March 22, 2026

Today's top AI stories: (1) OpenAI plans to nearly double workforce to 8,000 by end of 2026, per Financial Times. (2) Pentagon formalizes Palantir's Maven AI as official military program of record. (3) White House AI framework's Seven Pillars draw legal scrutiny over state preemption prospects. (4) Meta's Manus launches desktop AI agent app at $20/month for Mac and Windows. (5) AI startups captured record 41% of $128B in venture capital tracked by Carta. (6) Mamba-3 open-source state space model challenges transformer architecture on speed and inference cost. (7) Perplexity launches Comet Enterprise AI browser with CrowdStrike Falcon security integration. (8) Nvidia partners with Groq at GTC 2026 to address inference market vulnerability. (9) Google agrees to develop AI opt-out controls for UK publishers under CMA pressure. (10) Anthropic releases Code Review dispatching multi-agent teams for GitHub pull requests. (11) 66% of CEOs are freezing hiring while investing billions in AI, per Fortune analysis. (12) Mistral AI releases Small 4, a unified 119B-parameter open-source multimodal model.