DeepSeek V4 Pro went GA yesterday as build 0813. The price is real and it is on DeepSeek's own pricing page: $0.435 per million input tokens on a cache miss, $0.003625 on a hit, $0.87 per million output, 1M context. Against Fable 5 at $10/$50 that is roughly 1/46 on a blended workload. Note it is not "1/57 the price" — that figure is output-only. Input is about 1/23. Three different claims got compressed into one number. The performance side is where the discipline is needed. The agent jumps everyone is quoting — DeepSWE 12.8 → 62.7, Terminal Bench 2.1 72.1 → 87.9, CyberGym 52.7 → 83.3 — are DeepSeek's own chart, measured against DeepSeek's own preview build, circulated via a screenshot. Third-party benchmark tables for the model are currently empty. DeepSeek's changelog has no entry for the release either, which makes the rollout under-documented rather than imaginary. And the first hands-on report on HN is a useful counterweight: one commenter measured V4 Pro at 12m02s and $0.12, shipping a bug, against Grok 4.6 at 3m18s and $1.41 with none. Cheap is not the same as finished. Full breakdown (9 min): https://youtu.be/8F7U8kBNR9Q Every figure and who reported it: https://dsv4pro.novcog.us.com/ Curriculum tie-in: Phase-0 "who measured this, and against what baseline". A vendor chart comparing a model to its own preview is a real data point and not an independent one, and the difference is the whole story here. Full method map → https://hiddenstatedrift.com/method