Model Intelligence Gains Lose Power With Developers as AI Labs Face Adoption Plateau

Leading AI companies including OpenAI and Anthropic are confronting a sharp decline in the relationship between model capability improvements and developer adoption, with intelligence gains now producing substantially smaller traffic increases than in late 2025. A 10-point gap in benchmark performance between competing models now generates only 20% more developer traffic, down from approximately 69% in late 2025—a dramatic compression that signals a fundamental shift in how developers evaluate AI tools.