Claude 3.7 Sonnet is Anthropic’s first hybrid reasoning model offering fast chat responses or an optional extended thinking mode for step-by-step logic. It scores 62.3 % on SWE‑bench Verified out of the box, placing it among the leading models for real‑world coding tasks.You choose a thinking‑budget to trade off speed, precision, and cost. It handles tasks like refining marketing copy or email campaigns with iterative tone and structure tweaks and excels at testing logical workflows such as debugging code or parsing a multi‑step proposal.