Sonnet

Lesson in the Claude Code Roadmap · Stage 4: Claude Workflow

Last updated 14 September 2026

What is Sonnet?

Claude Sonnet is a high-performance large language model that strikes an ideal balance between advanced reasoning intelligence and rapid processing speed. It serves as the versatile "workhorse" of the Claude family, capable of handling complex programming tasks, such as multi-file refactoring and autonomous debugging, while operating significantly faster and more cost-effectively than the top-tier Opus model.

Study this in the interactive course See the whole Claude Code roadmap

Free resources to learn Sonnet

Official docsIntroducing Claude Sonnet 4.5 \ Anthropic
Official docsClaude Sonnet 4.5 \ Anthropic
VideoSonnet 4.5 is the best coding model in the world

Sonnet: common questions

Can I learn Sonnet in Hindi?

This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Sonnet in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.

Is this Sonnet tutorial for beginners?

It is lesson 37 of 109 in the free Claude Code roadmap, in stage 4, Claude Workflow. If you are new to Claude Code, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.