In the four months since Sonnet 4.6 shipped, the price of running a top-tier Claude model has gone from $3/$15 to $10/$50 per million tokens. That's more than triple.
Top-tier model releases are arriving faster and costing more, but for most business uses (content generation, summarization, extraction, RAG, classification), Sonnet 4.6 already handles the job, and has since February.
You could have picked Sonnet 4.6 four months ago, ignored every release since, and today you'd be running a model that handles those same tasks at a price that hasn't moved.