Anthropic's Claude Sonnet 5 API price stays at $2 input / $10 output per million tokens, with no end date. The earlier promotional rate was due to expire at the end of August, and the planned rise to $3/$15 is cancelled. The move follows OpenAI cutting prices on its Terra and Luna models, which the article links to competition from lower-priced Chinese large models. If your business uses AI tools through the API, budget at the current rate rather than a higher one. Otherwise this is background only.