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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.
TL;DR
Open-weight models have surged to handle 56% of token traffic on Vercel’s AI Gateway, marking a significant shift in AI usage. Despite this growth, Anthropic still commands 64% of the spending in this space.
✦ Why It Matters
Consider integrating open-weight models into your projects to reduce costs and leverage growing community support.
Key Takeaways
- Monitor the rise of open-weight models in your projects.
- Consider switching to cheaper models if they meet your needs.
- Analyze spending patterns to optimize costs on AI Gateway.
- Stay informed about model performance to ensure user satisfaction.
Full Summary
Open-weight models, which are generally more affordable, have increased their share of token usage on Vercel’s AI Gateway to 56%, a notable rise from just 7% in December 2025. This growth reflects a broader trend where enterprises are beginning to adopt these models more widely.
Despite this increase in usage, open-weight models only accounted for 14 cents of every dollar spent in August, indicating a disparity between token volume and actual spending. Anthropic's models, particularly Claude, continue to command a significant portion of the market, consistently representing over 60% of spending.
The data also reveals that model loyalty is driven more by performance and cost than by brand, as users are willing to switch models within or across providers if they find better value.