Daily briefing index

Thursday, July 9, 2026

Morning and afternoon are separate, focused editions. Choose one to read or share directly.

Morning brief

World models "imagine kinematically, not dynamically" · The Harness Effect: orchestration, not the model, sets your token bill

Open this edition End of day

OpenAI ships the GPT-5.6 family (Luna / Terra / Sol) · Anthropic's "Jacobian lens" reads what Claude does before it answers