Claude Sonnet 5 at a glance
Sonnet 5 narrows the gap with Opus 4.8 on reasoning, tool use, coding and knowledge work at a lower price, became the default model for Free and Pro users, and its $2/$10 introductory price was later made permanent.
What changed with Claude Sonnet 5
On June 30, 2026, Anthropic released Claude Sonnet 5, which it calls its most agentic Sonnet model. It can plan, use tools such as browsers and terminals, and run autonomously at a level that previously required larger models. Anthropic reports clear gains over Sonnet 4.6 in reasoning, tool use, coding and knowledge work, with performance close to Opus 4.8, and at higher effort settings it can match Opus 4.8 on some tasks.
Sonnet 5 became the default model for Free and Pro plans and is available to Max, Team and Enterprise users and through the API as claude-sonnet-5. It launched at an introductory $2 input and $10 output per million tokens; on August 10, 2026, Anthropic made that the standard price instead of raising it to $3/$15. Anthropic's safety testing found fewer undesirable behaviors than Sonnet 4.6 and much lower cybersecurity capability than its Opus models.
Claude Sonnet 5 benchmarks and pricing
Values are copied from the linked source on the date shown. They are not IA Compa measurements.
- Input price per 1M tokensas of · Source for Input price per 1M tokens: anthropic.com (opens in a new tab)
- $2.00
- Output price per 1M tokensas of · Source for Output price per 1M tokens: anthropic.com (opens in a new tab)
- $10.00
How it compares
Other models in the same category that we have covered, using each model's latest recorded value. (Models)
Where to compare Claude Sonnet 5
Independent leaderboards and official resources for comparing this model yourself. Rankings change often; each site shows its own current data.
Why Claude Sonnet 5 matters for businesses
For businesses, Sonnet 5 offers near-Opus agent performance at a lower list price than Sonnet 4.6, which makes it a strong default for high-volume agents and automations. Use the effort setting to balance cost and quality, and reserve Opus for the hardest tasks.
Sources for this story
- Introducing Claude Sonnet 5 (opens in a new tab)Official
Anthropic · anthropic.com
- Claude Platform release notes (opens in a new tab)Official
Anthropic · platform.claude.com
Last verified: . IA Compa summarizes public announcements for business readers. We are not affiliated with the companies mentioned. Always confirm details, pricing, and availability with the official source.
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