'Teams are moving to new models almost as fast as labs release them': Vercel data reveals AI models now have a half-life of just six weeks — with most most AI traffic running on models less than two months old
- Vercel finds a typical AI model peaks within four weeks of its launch
- Anthropic is outperforming OpenAI in attracting new teams of users
- Users are keen to stay ahead of the curve, with no show of loyalty
The time spent with a new AI model is decreasing, with teams using paid AI services sticking with a new model for an average of four weeks. At that point, they switch to another new model, aiming to keep their AI code development or agents competitive.
Vercel’s AI Gateway Production Index report for November 2026 claims this trend indicates that AI models effectively have a half-life of around six weeks. At that point, attention and use of the model decreases as teams and developers proceed to switch to the latest shiny alternative.
Illustrating the trend, Vercel reports that Anthropic Claude Opus 5.5 was the top model by spend in its first full month,...
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