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Claude Opus 4.1

Advanced AI model Claude Opus 4.1 delivers superior multi-file code refactoring, hybrid reasoning, and scalable agentic workflows, optimized for developers and enterprises handling complex software and data tasks.
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Claude Opus 4.1

Claude Opus 4.1 from Anthropic is a powerful AI model optimized for coding, reasoning, and autonomous workflows.

Claude Opus 4.1 by Anthropic is an advanced upgrade to the flagship Claude Opus 4 model, designed for coding, reasoning, and agentic tasks with outstanding precision and a 200,000-token context window. It supports up to 32,000 tokens in responses, achieving a leading 74.5% on the SWE-bench Verified benchmark, demonstrating superior performance in complex multi-file code refactoring and debugging large codebases.

Technical Specifications and Features:

  • 200,000-token context window allowing deep, large-scale data analysis.
  • Up to 32,000 tokens output per response, enabling complex multi-step tasks.
  • Improved SWE-bench coding performance: 74.5% Verified (up from 72.5% in Opus 4).
  • Hybrid reasoning mode for instant answers or extended detailed step-by-step analysis.
  • Enhanced advanced coding capabilities for autonomous planning and execution of large-scale code projects.
  • Superior reasoning and data synthesis across structured and unstructured datasets, including patent and research documents.
  • Rich, natural language content generation with improved prose and tone.

Performance Metrics

Claude Opus 4.1 demonstrates improvements across a broad range of capabilities compared to Opus 4, with especially strong gains in handling complex multi-file code refactoring.

API Pricing

  • Input: $19.5 / MTok
  • Output: $97.5 / MTok

Key Use Cases:

  • Large-scale code refactoring and precise bug fixing in expansive software projects.
  • Autonomous multi-step reasoning tasks and long-horizon AI agent workflows.
  • Comprehensive data analysis and insight extraction from complex data sources.
  • High-quality content creation with sophisticated, human-like text output.

Comparison with Other Models

vs. Claude Opus 4:Claude Opus 4.1 offers improved precision and excels in multi-file refactoring with hybrid reasoning capabilities, marking a clear advancement over the already strong coding and reasoning performance of Opus 4.

vs. Gemini 2.5 Flash:Claude Opus 4.1 significantly outperforms Gemini 2.5 Flash by delivering superior coding accuracy, making it much better suited for complex software engineering tasks.

vs. OpenAI o3-mini:Compared to OpenAI o3-mini, Claude Opus 4.1 provides enhanced support for autonomous coding workflows and achieves higher benchmark scores, reflecting greater effectiveness in multi-step programming and reasoning.

Limitations

  • No multimodal or vision capabilities.
  • Fine-tuning is not supported.
  • Focused exclusively on text-based tasks.

Claude Opus 4.1 by Anthropic is an advanced upgrade to the flagship Claude Opus 4 model, designed for coding, reasoning, and agentic tasks with outstanding precision and a 200,000-token context window. It supports up to 32,000 tokens in responses, achieving a leading 74.5% on the SWE-bench Verified benchmark, demonstrating superior performance in complex multi-file code refactoring and debugging large codebases.

Technical Specifications and Features:

  • 200,000-token context window allowing deep, large-scale data analysis.
  • Up to 32,000 tokens output per response, enabling complex multi-step tasks.
  • Improved SWE-bench coding performance: 74.5% Verified (up from 72.5% in Opus 4).
  • Hybrid reasoning mode for instant answers or extended detailed step-by-step analysis.
  • Enhanced advanced coding capabilities for autonomous planning and execution of large-scale code projects.
  • Superior reasoning and data synthesis across structured and unstructured datasets, including patent and research documents.
  • Rich, natural language content generation with improved prose and tone.

Performance Metrics

Claude Opus 4.1 demonstrates improvements across a broad range of capabilities compared to Opus 4, with especially strong gains in handling complex multi-file code refactoring.

API Pricing

  • Input: $19.5 / MTok
  • Output: $97.5 / MTok

Key Use Cases:

  • Large-scale code refactoring and precise bug fixing in expansive software projects.
  • Autonomous multi-step reasoning tasks and long-horizon AI agent workflows.
  • Comprehensive data analysis and insight extraction from complex data sources.
  • High-quality content creation with sophisticated, human-like text output.

Comparison with Other Models

vs. Claude Opus 4:Claude Opus 4.1 offers improved precision and excels in multi-file refactoring with hybrid reasoning capabilities, marking a clear advancement over the already strong coding and reasoning performance of Opus 4.

vs. Gemini 2.5 Flash:Claude Opus 4.1 significantly outperforms Gemini 2.5 Flash by delivering superior coding accuracy, making it much better suited for complex software engineering tasks.

vs. OpenAI o3-mini:Compared to OpenAI o3-mini, Claude Opus 4.1 provides enhanced support for autonomous coding workflows and achieves higher benchmark scores, reflecting greater effectiveness in multi-step programming and reasoning.

Limitations

  • No multimodal or vision capabilities.
  • Fine-tuning is not supported.
  • Focused exclusively on text-based tasks.
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