Signal Anthropic launches Claude Sonnet 5 as default model for all Free/Pro users

Summary

Claude Sonnet 5 launched on 30 June 2026 and became the default model for free and pro users worldwide on 1 July. It scored 63.2% on the SWE-bench Pro agentic coding benchmark, 81.2% on OSWorld-Verified, 80.4% on Terminal-Bench 2.1, and 57.4% on Humanity's Last Exam with tools. Introductory pricing of $2 per million input tokens and $10 per million output tokens runs through 31 August 2026, after which standard pricing of $3 and $15 respectively takes effect. The California state government contracted with Anthropic to deploy Claude at a 50% discount to all state agencies and participating local governments through the SITeS portal, covering roughly 300,000 state workers, in the largest government AI adoption on record. At the same time, the federal government maintains a supply chain risk designation against Anthropic, though California's state CIO said the designation simply did not come up during contract negotiations.