Claude Sonnet 5 · $2/$10 made permanent

Anthropic's Sonnet 5 launch post was edited 10 Aug: introductory API pricing of $2 per million input tokens and $10 per million output stays. The $3/$15 step that was due 1 Sept is cancelled.⁷ Budget the locked rate. The platform pricing docs still show the old two-row table with an August 31 cutoff — treat the dated edit on the news page as the primary until docs catch up.⁸

Relevant to: anyone whose agents default to Sonnet 5 and who had a 50% step-up in the September forecast