What happened
On June 30, 2026, Anthropic released Claude Sonnet 5, its most capable and agentic Sonnet model yet, positioned as a lower-cost way to run agents. It posts strong coding and computer-use scores that narrow the gap with the flagship Opus 4.8. Launch API pricing is $2 per million input tokens and $10 per million output tokens through August 31, before rising to $3 and $15.
The context
Sonnet is the workhorse tier most developers actually deploy, so gains here spread quickly across apps and tools.
Why this moves the Board: Release execution · Materiality 4 · T3 Reported → weighed for Anthropic at the next refresh.