Open-weight models accounted for more than half of monthly token throughput on cloud platform company Vercel’s AI Gateway for the first time.

A report by The New Stack, citing a Vercel report, said open-weight models made up 56 percent of tokens in August. That was up sharply from 7 percent in December 2025 and 13 percent in April this year. The share in July was 36 percent.

Vercel CEO Guillermo Rauch (기예르모 라우치) said the share hit a record 62 percent on Aug. 22.

He also said, "This trend is likely only beginning. Enterprise adoption is still in the early stages. We need to change harnesses, command-line tools, integrated development environments and software development kits so they are not tied to a specific model."

Vercel launched AI Gateway last year to help developers use models from multiple developers through a single interface. Developers do not need to manage API keys, accounts and usage limits separately by model provider. The gateway relays requests between applications and model providers and tracks usage and costs.

This puts Vercel in a position to see which models customers use in real services.

Token usage is not the same as spending. Processing 56 percent of tokens does not mean it accounts for 56 percent of spending.

Vercel data show open-weight models logged estimated spending of 14 cents per $1 in August. Vercel said the spending share for open-weight models is also rising.

A Vercel report said Anthropic maintained the biggest share in the high-priced market. In August, 64 cents per $1 of spending went to Anthropic models. Vercel said Anthropic's share has not fallen below 61 percent since December 2025. Over the same period, Anthropic models held the top two spots in spending, and Anthropic models often took third place.