Anthropic launches Claude Sonnet 5 for cheaper agent workflows

TechCrunch reports that Anthropic launched Claude Sonnet 5, a more agentic version of its midsize model. Anthropic says Sonnet 5 can plan, use tools such as browsers and terminals, and run autonomously at a level that recently required larger models. It is becoming the default for Claude free and Pro plans and is available across subscriptions. Anthropic priced it below Opus 4.8 and positioned it as a way for users to balance cost and capability for coding, tool use, and knowledge work.

Key details: Published June 30, 2026 by TechCrunch, Claude Sonnet 5 is Anthropic's new midsize model, Anthropic says it improves reasoning, tool use, coding, and knowledge work, It becomes the default model for free and Pro Claude plans, Introductory API pricing is lower than Claude Opus 4.8.

Why it matters: Agentic performance is moving down the price curve, so model competition is increasingly about reliable autonomy per dollar rather than only peak benchmark scores.