Claude Sonnet 5
Anthropic's Claude Sonnet 5 language model with 1M context and adaptive thinking.
Claude Sonnet 5 is presented in the supplied evidence context as a language-model release from Anthropic, launched across Claude, the API, and Claude Code with a 1M-token context window, adaptive thinking, and introductory $2/$10 per-million-token pricing.
Pricing
Prompt-cache rates: $2.50 per million tokens for 5-minute cache writes, $4 per million for 1-hour cache writes, and $0.20 per million cache hits/refreshes. Anthropic states that $2/$10 per million input/output tokens, initially introductory through August 31, 2026, is now standard pricing; the planned September 1 increase did not occur.
Anthropic's official pricing documentation explicitly lists Claude Sonnet 5 prices, and its model-specific documentation confirms the exact model and token rates. Current standard rates are $2 per million input tokens and $10 per million output tokens.