CLAUDE SONNET 5 GOES LIVE AS DEFAULT MODEL, ANTHROPIC BETS ON AGENTIC PRICING WAR
Anthropic launched Claude Sonnet 5 on June 30, 2026, and the model became the default for Free and Pro Claude users starting July 1 — the fastest a Sonnet-class model has ever rolled out to the general public. Company engineers describe it as the most agentic Sonnet ever built, with benchmark performance landing close to flagship Opus 4.8 on a wide range of coding and reasoning tasks.
"Frontier-adjacent agentic capability at a price that keeps enterprise AI cost models viable."
The rollout comes bundled with introductory pricing of $2/$10 (input/output per million tokens) through August 31, undercutting the previous Sonnet 4.6 tier. Industry watchers read the move as a direct response to enterprises recoiling from ballooning agentic AI bills throughout Q2 2026, as long-running autonomous coding agents chewed through token budgets far faster than traditional chat usage.
Whether the discount holds after the introductory window closes will be the real test of whether "agentic pricing" can be sustained at scale.