11 days from now, Sonnet 5 goes from $2/$10 to $3/$15 per million tokens. A 50% increase across the board. If you built session budgets, cost estimates, or routing logic around the introductory rate — and you probably did, because it was the correct price when you set it — your cost model break...
Source: [Dev.to](https://dev.to/assili_salim_e3c07f9954de/claude-sonnet-5s-introductory-pricing-expires-august-31-your-cost-model-doesnt-know-that-yet-4e1j)