China's Efficiency Arbitrage: Your US AI Book Is Mispriced by 10-28x
The Core Problem
A tour of 14 Chinese AI labs produced something closer to a unit-economics report than an AI story. Export controls did not suppress Chinese AI. They industrialized its efficiency. The labs are extracting 4-7x more intelligence per FLOP than naive scaling predicts, shipping models 6-8 months behind the frontier at 10-28x lower prices, and holding 50-70% gross margins while doing it. CAISI, the US government's own assessment, agrees the capability gap is roughly stable at 6-8 months. The unit-economics gap is structural and widening.
The Numbers That Break the Thesis
DeepSeek V4 Pro clears at $0.43/M input tokens. GLM-5 at $1.00. Kimi K2.5 at $0.95. Claude Opus 4.6's premium tier runs 11-28x higher for comparable-quality work, which is a lot of multiplier to defend. Z.ai reports 50% gross margins at those prices. MiniMax reports 70%. These are not subsidized loss-leaders, or rather, the more interesting version: they are profitable operations running on 8x less compute.
Chinese token volume has reached ~9 quadrillion tokens/month against roughly 4 quadrillion in the US and West. The consumption side is already 2x. Market structure is the other half of the puzzle: 14+ frontier-class labs in China, including Meituan, Ant, and ByteDance, against 5 in the US, fragmenting the chip pool and collectively out-iterating through open-source.
The Bellwether Signal
Cursor built Composer 2 on MoonshotAI's Kimi K2.5. A flagship US developer-tools company, one that sits in dozens of venture portfolios, is already routing workloads through Chinese open-source infrastructure. This is not a margin decision. It is capitulation on the proprietary-frontier-model moat.
When a darling portfolio candidate builds its flagship product on Chinese open-source, the thesis that "access to frontier models" constitutes a moat is no longer supported by the evidence.
Portfolio Implications
The $285B that flowed into US AI startups in 2025 against $12.4B in China was priced on the thesis that capital intensity creates durable pricing power. Chinese efficiency is that thesis's biggest counterexample on the board. Asking whether China will reach the frontier is the wrong framing. Adequate capability at 1/20th the cost collapses premium pricing in most enterprise use cases. That is the actual question, and mostly the answer is no.
CAISI, the lab tour, and Cursor's routing decision all point the same way. The durable moats now live in distribution + proprietary data + workflow lock-in, not raw model capability. Frontier model access belongs in the commodity column in most thesis docs this quarter, if LPs are reading carefully.
The Contrarian Read
China is not catching up on capability. The gap is stable. What is actually happening is that China is winning on unit economics while the US wins on capability, and those are different axes. Premium pricing survives where frontier capability is differentially necessary: complex reasoning and safety-critical agents, plus frontier coding (Claude on F4). Outside that perimeter, the Chinese price floor becomes the global price floor inside 12 months. This is probably wrong in the tails. It is the base case everywhere else.
What to do
Run gross-margin stress test across every AI portfolio company assuming inference costs drop 80% in 12 months
Source and diligence 3-5 'efficient inference' startups (kernel optimization, MoE serving, distillation-as-a-service) within 30 days
Update sector thesis doc: reclassify 'frontier model access' from moat to commodity; elevate 'distribution + proprietary data + workflow lock-in'
Track DeepSeek external-capital round valuation and syndicate as key comp benchmark