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Open-weight models now handle a majority of tokens on Vercel’s AI Gateway. But Anthropic still takes 64% of the spend.

calendar_today September 18, 2026 person Paul Sawers domain the-new-stack

The trend is clear: open-weight models are taking an increasingly large bite out of production AI usage. On Monday, The The post Open-weight models now handle a majority of tokens on Vercel’s AI Gateway. But Anthropic still takes 64% of the spend.

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