AIE World's Fair 2026 — OpenAI: The Codex Keynote
AI ENGINEER
Jul 1, 2026
20 min
Alexander Embiricos and Roman Huitt of OpenAI argue that far from replacing engineers, AI is triggering a return to engineering's roots — "AI engineers are eating the world." They frame Codex as a layered, open stack (model, responses API, open-source harness, apps server, app-layer plugins) that OpenAI uses internally exactly as it ships to developers, and preview the GPT 5.6 series across cost-efficient (Terra, Luna), fast (Codex Spark, Cerebras at 750 tok/s), and frontier variants. The talk closes on "value maxing" — extracting real value from agents through cost, speed, and parallel cloud execution rather than "token maxing."