Meet Claude Opus 4.1
Our most intelligent AI model, pushing the frontier for coding and AI agentsβenabling Claude to handle hours of work across Claude and Claude Code.
What is Claude Opus 4.1?
Claude Opus 4.1 is an upgrade to Claude Opus 4, specifically enhanced for agentic tasks, real-world coding, and reasoning. It represents our most powerful model yet, designed to handle complex, multi-step workflows that can span hours of development work.
Advanced Coding Performance
74.5% success rate on SWE-bench Verified, excelling at multi-file code refactoring
Precision Debugging
Pinpoints exact corrections in large codebases without unnecessary changes
Enhanced Research Capabilities
Improved in-depth research and data analysis with better detail tracking
Key Improvements
How to Use Claude Opus 4.1
With Claude Code
- Install Claude Code globally:
npm install -g @anthropic-ai/claude-code
- Navigate to your project directory:
cd your-project
- Run Claude Code:
claude
- Complete the OAuth process and start coding with Opus 4.1!
Via API
Use the model directly in your applications:
curl https://api.anthropic.com/v1/messages \
-H "Content-Type: application/json" \
-H "x-api-key: $ANTHROPIC_API_KEY" \
-d '{
"model": "claude-opus-4-1-20250805",
"max_tokens": 1024,
"messages": [
{"role": "user", "content": "Hello, Claude!"}
]
}'π‘ Pro Tip
Claude Opus 4.1 is also available on Amazon Bedrock and Google Cloud's Vertex AI. Pricing remains the same as Opus 4, making it an easy upgrade for existing users.
Perfect for These Use Cases
Multi-file Refactoring
Restructure large codebases with precision, handling complex dependencies across multiple files without breaking functionality.
Precision Debugging
Identify and fix bugs in large codebases with surgical precision, avoiding unnecessary changes that could introduce new issues.
In-depth Research
Conduct comprehensive code analysis and research with enhanced detail tracking and agentic search capabilities.
AI Agents
Build sophisticated AI agents that can handle complex, multi-step workflows spanning hours of development work.
Data Analysis
Perform complex data analysis tasks with improved reasoning capabilities and attention to detail.
Complex Reasoning
Tackle sophisticated reasoning problems that require deep understanding and multi-step logical processing.
Frequently Asked Questions
What is Claude Opus 4.1?
How does Claude Opus 4.1 compare to previous models?
Where can I access Claude Opus 4.1?
What are the main use cases for Claude Opus 4.1?
How do I get started with Claude Opus 4.1 in Claude Code?
Ready to experience Claude Opus 4.1?
Join thousands of developers already using Claude Opus 4.1 to revolutionize their coding workflow.