Open Weights Lag Behind Frontier Labs' Release Cadence and Revenue
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2 postsno idea why do this though
excellent post on why frontier "labs" employees should stop fearing and learn to love open source. Their fat margins are largely invincible to it.
Thanks for these thoughts Nathan. We largely agree: the trailing equilibrium is real and a net good, near-term risks are overhyped, bans make things less safe, and independent evals are the institution worth building. But I strongly reject that open weights as we're seeing them are decelerationist even for the leading labs. Ball is not right here, and even splitting the difference is unfair to the reality. Dean quickly shrunk the claim to open weights decelerating capex on the margin, calling that much straightforwardly true. Even the shrunken version has the sign wrong. Let me lay it out. Opus 4.6 at its peak commanded 3/4 of Anthropic's API revenue, near 80% with Fast Mode. Beneath it in the same SemiAnalysis mix, the prior Opus generation collapsed from 10% of revenue to 0.2% in five quarters, its price from $35 to $3 per million tokens. Open weights didn't do that. The leader's next release did. The cadence liquidates last cycle's rents before any open model arrives to claim them. Mythos/Fable then more than doubled Anthropic's run rate overnight, and something like 90% of model revenue now sits with three models. Open weights compete for the fumes of the release cadence, capability already repriced down 90% and moved past. The subscriber annuity buys the product, not the weights. Even if we concede an equilibrium somewhere in between, say open weights a cycle behind account for a full 20% of revenue, notice why the number is bounded: the floor can only tax capability it already has, the frontier delta is priced against displaced wages, and the subscription layer is product economics. Seeing 20% as decelerative fails to grasp what acceleration even is: trading the linear for the exponential. A bounded share is a linear cost, and a linear cost vanishes in the limit. Meanwhile what that cost buys sits inside the exponent, per your own reporting. Gated DeltaNet: late-2024 academia to frontier scale by mid-2026. KDA: Kimi Linear paper into Olmo Hybrid, Qwen, and Nemotron in a fraction of that. And the channel the buffer frame doesn't price: labs RL on each other's releases. The distillation fights prove frontier outputs are already the industry's teacher signal, harvested through API gates. Weights in the open remove the gate: every lab gets an unmetered teacher, grader, and trace generator. That is not architecture diffusion on an eighteen-month clock. It is post-training convergence on a quarterly one. Each release becomes next cycle's curriculum for everyone, the floor converges faster, and willingness-to-pay concentrates in the one thing the floor can't teach: the current delta. That leaves the fundraising channel, where cheaper open models are meant to compress margins, dent valuations, and slow the next raise. It fails empirically for the same reason. Twice now a frontier-class open release has hit the tape, chip stocks have convulsed, and the market has bounced inside forty-eight hours. $1.4T committed against $25B of revenue never priced margin annuities; it prices cadence, position, and a market that doubles as capability climbs. And the tax is levied by labs that raised orders of magnitude less capital and train because they lack inference demand. The deceleration story needs followers who depend on the leader's margins. Your reporting shows they don't. The exponential does not notice the toll. So I'd push one step past your closing frame: you call the open-closed dance collective action for the community to steward. It doesn't need stewarding. Every party in it is being paid. The catch-up tier ships because shipping is its only relevance. The leader banks the architectures, the free teachers, and the trained-up cohort. The gap you call society's safety buffer doubles as the leader's paid moat. Open models are the slower-starting bigger exponential, agreed; my claim is the leaders ride the same curve. Last-cycle weights in the open accelerate everyone's next release, all compute buildout, and the expansion into higher-value work the leaders capture on their release. Raising the floor makes next quarter's burst bigger by more than it costs last quarter's tail. Step back and the whole disagreement has the shape of a single inversion. The deceleration story, in every channel, casts the open tier as a cost the leading labs bear. It is the opposite. The open tier is their R&D pipeline, teacher network, customer curriculum, and demand flywheel, financed by their competitors, consuming only rents the cadence already burned. Ball's claim isn't overstated. It's pointed backwards. Open weights aren't the brake. They're nearly-free nitrous. The floor isn't eating the frontier's lunch. It's setting the frontier's table.
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