Open-weight models take most Vercel gateway tokens while frontier providers retain most spend

Vercel · 31 August 2026

In August 2026, open-weight models processed 56% of token volume on Vercel AI Gateway and accounted for 14% of estimated spend. Vercel reports that average price per token fell 23.2% in August. Anthropic nevertheless retained 64% of all estimated gateway spend, and its models had held the top two positions by spend each month since December.

This is the observable fact the cited source supports, stated without interpretation.

Tests whether broad availability of cheaper and open-weight capability erodes scarcity rents, or whether premium frontier capability continues to sustain concentrated spending.

Capability Scarcity Dependence

This is genuinely ambiguous evidence for Capability Scarcity Dependence. Open-weight models taking a majority of production token volume while average inference cost falls is consistent with capability becoming more available and cheaper. At the same time, the persistence of concentrated frontier spending shows that scarcity rents can survive at the high-value end even while lower-cost capability diffuses rapidly. The observation therefore argues against treating commoditisation as uniform.

The same production dataset contains evidence in both directions. It is therefore useful for defining where CSD may weaken first and where premium capability can remain scarce enough to command materially higher spending.

This is the framework's reading of the fact above. The source does not endorse it and is not cited as doing so.

Vercel AI Gateway is one routing platform and does not represent the whole enterprise AI market. Estimated spend uses public list prices rather than actual negotiated bills, and differences in workload complexity can justify premium model usage without establishing durable scarcity rents.

Recorded for every observation assessed at strength 4 or 5. A record that cannot state the strongest competing reading of its own evidence is not published.

What would strengthen this evidence

Comparable production-routing data across several gateways or enterprise datasets showing whether frontier spend concentration persists as open-weight capability improves.

What would weaken or falsify this interpretation

A sustained collapse in frontier spend share, rapid multi-provider switching without performance loss, or evidence that premium model prices converge towards open-weight inference costs.

Vercel
Open-weight models take 56% of token volume, Astra doubles Fable 5.1 spend
PrimaryPublished 17 September 2026Last verified 30 September 2026
The September index reports anonymised aggregate AI Gateway traffic through August 2026. Vercel reports 56% open-weight token share, 14% open-weight estimated spend, a 23.2% August fall in average token cost, and 64% of estimated spend going to Anthropic.

Where several outlets report the same development, they are recorded as additional sources on this one observation rather than as separate evidence.