Claude Sonnet 4.6

Overview

Claude Sonnet 4.6 is a major upgrade to Anthropic's Sonnet series, designed to deliver performance close to the flagship Opus model at a more economical cost. It achieves comprehensive improvements in coding, computer use, long-context reasoning, and knowledge work. For the first time in the Sonnet series, it introduces a 1,000,000 token context window (beta), making it an ideal choice for enterprise-level automation and complex task processing.

Key Features

• Near-Opus Performance: In multiple benchmarks, especially for processing enterprise documents (charts, PDFs, tables), its performance is comparable to the Opus 4.6.
• 1M Token Context Window: Brings a million-token context window to the Sonnet series for the first time, capable of processing entire codebases or massive research papers.
• Excellent Coding & Computer Use: Demonstrates outstanding ability to use real software, reaching or exceeding human-level performance in complex code fixes and multi-step web workflows.
• Distinction from 4.5: A comprehensive skill upgrade over 4.5 with stronger instruction-following, fewer hallucinations, and more reliable multi-step task execution.

Best Use Cases

• Enterprise Document Analysis: Efficiently processing and reasoning with complex PDF documents containing charts and tables.
• Large-Scale Codebase Refactoring: Ideal for codebase-level analysis and modification thanks to its million-token context.
• Cost-Effective Agentic Workflows: Providing top-tier performance for automated tasks requiring multi-step planning.
• Knowledge Work & Design: Excelling in high-quality content generation and front-end design with fewer iterations required.

Capabilities and Limitations

Capability	Detailed Description
Reasoning Ability	Strong. Performance in long-context reasoning and complex problem-solving is close to the Opus level.
Creative Ability	Strong. Particularly adept at generating high-quality code and front-end pages with a good sense of design.
Multimodal Ability	Supported. Capable of processing and understanding multimodal inputs such as images and PDFs.
Response Speed	Medium. Achieves an excellent balance between performance and speed.
Context Window	1,000,000 Tokens (beta). Supports a max output of 128,000 tokens.

Credits and Pricing

Model	Input (Credits/Token)	Output (Credits/Token)
Claude Sonnet 4.6	3.00	15.00