The AI Price and Intelligence Index Snapshot from OpenRouter and Artificial Analysis is useful for market context, but it's a post-facto report, not the immediate trigger for programming model leadership shifts.
Those transitions, like moving from Claude Sonnet 3.5 to 4.5, are usually driven by a tangible improvement in performance or a clear cost-benefit that justifies the migration effort.
For us, it's about whether the new version actually cuts our processing time for a complex task by 20% or significantly reduces API costs; that's the real invalidation that makes us act.
Without a direct operational advantage, the size of the price shift in a report won't make an IT department re-engineer existing workflows.