What is Claude Sonnet 4?

Claude Sonnet 4 is a breakthrough AI model, refining the strengths of Claude Sonnet 3.7 and delivering impressive results across software engineering tasks, coding, and advanced reasoning. With a robust 72.7% on SWE-bench, Sonnet 4 demonstrates remarkable improvements in handling complex tasks, clearer reasoning, and more effective code optimization. The model’s ability to execute complex instructions with higher accuracy and navigate intricate codebases with fewer errors makes it indispensable for developers. Whether for app development or addressing sophisticated software engineering challenges, Sonnet 4 balances performance and efficiency, offering an optimal solution for enterprises and individual developers seeking high-quality AI assistance.

Pricing

Price Starts At:
$3 / 1 million tokens (input)
Price Overview:
Input: $3 per 1 million tokens
Output: $15 per 1 million tokens

Integrations

Offers API?:
Yes, Claude Sonnet 4 provides an API
All Claude Sonnet 4 Integrations
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Company Facts

Company Name:
Anthropic
Date Founded:
2021
Company Location:
United States
Company Website:
claude.ai

Product Details

Deployment
SaaS
iPhone
Android
Training Options
Documentation Hub
Support
Web-Based Support

Product Details

Target Company Sizes
Individual
1-10
11-50
51-200
201-500
501-1000
1001-5000
5001-10000
10001+
Target Organization Types
Mid Size Business
Small Business
Enterprise
Freelance
Nonprofit
Government
Startup
Supported Languages
Arabic
Chinese (Mandarin)
Chinese (Simplified)
English
French
German
Hindi
Italian
Japanese
Korean
Portuguese
Russian
Spanish

Claude Sonnet 4 Categories and Features

Large Language Models

AI Models

AI Agents

More Claude Sonnet 4 Categories

Claude Sonnet 4 Customer Reviews

Write a Review
  • Reviewer Name: A Verified Reviewer
    Position: Developer
    Has used product for: Less than 6 months
    Uses the product: Daily
    Org Size (# of Employees): 26 - 99
    Feature Set
    Layout
    Ease Of Use
    Cost
    Customer Service
    Would you Recommend to Others?
    1 2 3 4 5 6 7 8 9 10

    HUGE upgrade

    Date: May 22 2025
    Summary

    In general, Claude Sonnet 4 is a remarkable upgrade. The model brings powerful performance and improved steerability, making it an excellent choice for those seeking both capability and practicality. I’m looking forward to using it more, as it’s clear that it will only get better with more interaction. Whether you’re coding, problem-solving, or simply looking for a reliable AI assistant, Claude Sonnet 4 is definitely worth trying.

    Positive

    I just started using Claude Sonnet 4 today, and it's already exceeded my expectations. The improvements over Sonnet 3.7 are noticeable, especially in how it handles complex instructions. It’s far better at reasoning and understanding context, delivering answers with precision. The new memory capabilities, like extracting and storing key facts, make the interactions feel more continuous and intelligent. Plus, its ability to use tools in parallel during extended thinking adds another layer of depth, making it ideal for more intricate tasks.

    Negative

    While the overall performance is impressive, there are minor areas that could still use refinement. Occasionally, the responses take a bit longer when working on more advanced queries.

    Read More...
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