A December 2025 AI Price and Intelligence Index snapshot can't possibly explain market leadership shifts that already occurred throughout that entire year; it's a backward-looking report, not a predictive catalyst driving actual operational change.
Real-world shifts, like companies moving from Claude Sonnet 3.5 to 4.5, are always driven by immediate, palpable performance gains or critical cost-benefit analyses that unlock the highest possible payoff.
This isn't about some abstract index; it's about the very real weeks of re-engineering, testing, and ensuring system stability that our members in IT departments have to endure, much like updating a major piece of industrial software.
Focusing on a retrospective dataset misses the actual, concrete triggers for these transitions.