Title

The question

Two numbers

Part 1 — Four axes

Part 1 — Four axes

Part 1 — The ablation

Part 1 — Product form

Part 1 — Verdict

Part 2 — Brain and body

Part 2 — The brain's contract

Part 2 — What each side owns

Part 2 — The frequency stack

Part 3 — Why language was easy

Part 3 — Pillar one: data

Part 3 — Pillar two: roofline

Part 3 — Read the GB/s line

Part 3 — Throughput vs bandwidth

Part 3 — The scorecard

Part 3 — Five blockers

Part 4 — The grid

Part 4 — Evaluation

Part 4 — Buy diversity

Part 4 — The sources ladder

Part 4 — Action representation

Part 4 — The compression cliff

Part 4 — The latency budget

Part 5 — Every hook answered

Part 5 — The build order

Part 5 — Milestones

Part 5 — Borrowing the recipe

Part 5 — M1, the episode schema

Part 5 — M1, the data engine

Part 5 — M1, prompt anatomy

Part 5 — M2, architecture

Part 5 — M2, the firewall

Part 5 — M3, one training step

Part 5 — M3, post-training

Part 5 — M3, the RL iteration

Part 5 — M3, RL

Part 5 — M4, the serving runtime

Part 6 — Three open bets

Closing