Claude Sonnet 5

Claude Sonnet 5 balances intelligence and speed, making it a strong default across a wide range of production work. It pairs capable reasoning with practical latency and cost, so you get high-quality output without reaching for the largest model.

The model performs strongly on coding, analysis, mathematics, and instruction following, handling everything from application logic to data-heavy reasoning. It is dependable for structured outputs and agentic tool use, which makes it a solid backbone for most automations.

Available through the standard Claude API and tooling, Sonnet 5 is built to carry the majority of production traffic; capable enough for demanding tasks, efficient enough to run at scale, and easy to combine with Haiku for routing and Opus for the hardest work.

• Balanced Performance: High-quality reasoning at practical speed and cost.
• Strong Coding: Reliable software engineering and analysis.
• Broad Capability: Math, RAG, and complex reasoning across domains.
• Production Ready: Dependable structured output and tool use.