Zuckerberg admits Meta's agent bet is four months behind — Jul 6

Meta CEO Mark Zuckerberg told employees this week that AI agent development hasn't accelerated as expected despite $145 billion in planned 2026 infrastructure spend and 15,000 employees restructured toward AI. OpenAI moves fast in the gap, adding Sol Ultra subagent-cooperative mode to Codex timed around Anthropic's July 7 Persona KYC rollout. Plus: Dartmouth's Phosphor AI tutor achieves 0.71–1.30 SD learning gains — approaching the Bloom 2-sigma ceiling of one-on-one instruction.