Claude Sonnet 5
The best combination of speed and intelligence
Claude Sonnet 5 is Anthropic's Sonnet-tier model release, launched June 30, 2026, positioned as a more agentic upgrade over Claude Sonnet 4.6 for coding, tool use, agents, and professional work. It is available in Claude, Claude Code, and the Claude API under the API model ID `claude-sonnet-5`.
Pricing
Introductory pricing applies through August 31, 2026. Starting September 1, 2026, official table states standard pricing becomes $3/MTok input, $15/MTok output, and $0.30/MTok cache hits/refreshes. Current prompt cache write prices in the table are $2.50/MTok for 5m cache writes and $4/MTok for 1h cache writes.
Anthropic's official Claude Platform pricing table lists Claude Sonnet 5 pricing through August 31, 2026 at $2 per MTok base input, $0.20 per MTok cache hits/refreshes, and $10 per MTok output; today (2026-08-03) falls within that introductory pricing period. The official launch post corroborates $2 per million input tokens and $10 per million output tokens through August 31, 2026, then $3/$15 standard pricing afterward.