Open-weight models surge to 29% of volume, price per token flattens

Vercel's AI Gateway Production Index for July 2026 reports that gateway token volume grew 29% month over month and spend grew 27%, while the price per token was flat after rising almost 20% in May.

Open-weight models ran 29% of gateway tokens, up from 11% in April, on under 4% of spend.

DeepSeek reached 22.6% of token volume, in third place and less than two points behind Google, and GLM 5.2 broke into the gateway's top models by volume two weeks after release.