Claude Sonnet 4: Smart & Fast

The ideal balance of intelligence and speed. Claude Sonnet 4 delivers high-quality responses quickly for everyday professional tasks.

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Claude Sonnet 4 is Anthropic's balanced mid-tier model, designed to deliver strong performance across a wide range of tasks while maintaining fast response times. It's the most popular Claude model for professional use.

Sonnet 4 offers an excellent trade-off between capability and speed, making it ideal for coding, writing, analysis, and daily work tasks. It handles complex prompts well while responding quickly enough for interactive workflows.

Balanced Intelligence

Strong reasoning and analysis that handles most professional tasks with high accuracy.

Fast Code Generation

Write, review, and debug code quickly across all major programming languages and frameworks.

Clear Writing

Produce well-structured articles, emails, reports, and documentation efficiently.

Quick Analysis

Analyze documents, data, and complex questions with speed and accuracy.

Task Automation

Handle multi-step workflows, data extraction, and repetitive tasks reliably.

Conversation Flow

Maintain natural, context-aware dialogue across extended conversations.

Open the chat

Click "Open Chat" to start using Claude Sonnet 4 instantly.

Type your request

Enter any task - Sonnet handles coding, writing, analysis, and more.

Get a fast response

Receive a high-quality answer quickly, ready for professional use.

Continue working

Ask follow-ups to refine outputs or tackle additional tasks.

Use the results

Copy responses directly into your workflow, code, or documents.

Yes, Claude Sonnet 4 is available for free on chatgpt.org.

Choose Sonnet for faster responses on everyday tasks. Choose Opus when you need maximum reasoning power for complex problems.

Yes, Sonnet is excellent for coding - it's fast, accurate, and handles most programming tasks with ease.

Daily professional work: coding, writing, analysis, research, and interactive conversations.

Sonnet is significantly faster than Opus while maintaining strong quality across most tasks.

Yes, Sonnet has a large context window and maintains coherence across extended conversations.

Claude Sonnet 4: Smart & Fast

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