Anthropic Launches Claude Sonnet 5 — Most Agentic Mid-Tier Model Yet, at Introductory $2/MTok

Released June 30, Claude Sonnet 5 brings near-Opus-class agentic performance — autonomous tool use, multi-step coding, browser tasks — at $2/M input tokens through August 31, roughly 60% cheaper than Opus 4.8. For Indian builders running high-volume agents or coding workflows, this is a meaningful unit-economics shift: Sonnet 5 scores 63.2% on agentic coding vs. Sonnet 4.6's 58.1%, and its 1M-token context window is now on by default — watch for the new tokenizer producing ~30% more tokens on the same text, which will inflate costs post-September.

Source: TechCrunch ↗