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What is Claude Opus 4.1?

Claude Opus 4.1 marks a significant iterative improvement over its earlier version, Claude Opus 4, with a focus on enhancing capabilities in coding, agentic reasoning, and data analysis while keeping deployment straightforward. This latest iteration achieves a remarkable coding accuracy of 74.5 percent on the SWE-bench Verified, alongside improved research depth and detailed tracking for agentic search operations. Additionally, GitHub has noted substantial progress in multi-file code refactoring, while Rakuten Group highlights its proficiency in pinpointing precise corrections in large codebases without introducing errors. Independent evaluations show that the performance of junior developers has seen an increase of about one standard deviation relative to Opus 4, indicating meaningful advancements that align with the trajectory of past Claude releases. Opus 4.1 is currently accessible to paid subscribers of Claude, seamlessly integrated into Claude Code, and available through the Anthropic API (model ID claude-opus-4-1-20250805), as well as through services like Amazon Bedrock and Google Cloud Vertex AI. Moreover, it can be effortlessly incorporated into existing workflows, needing only the selection of the updated model, which significantly enhances the user experience and boosts productivity. Such enhancements suggest a commitment to continuous improvement in user-centric design and operational efficiency.

What is Claude Sonnet 3.5?

Claude Sonnet 3.5 from Anthropic is a highly efficient AI model that excels in key areas like graduate-level reasoning (GPQA), undergraduate knowledge (MMLU), and coding proficiency (HumanEval). It significantly outperforms previous models in grasping nuance, humor, and following complex instructions, while producing content with a conversational and relatable tone. With a performance speed twice that of Claude Opus 3, this model is optimized for complex tasks such as orchestrating workflows and providing context-sensitive customer support. Available for free on Claude.ai and the Claude iOS app, and offering higher rate limits for Claude Pro and Team plan users, it’s also accessible through the Anthropic API, Amazon Bedrock, and Google Cloud’s Vertex AI, making it both affordable and scalable for developers and businesses alike.

Media

Media

Integrations Supported

Amazon Bedrock
Claude
Vertex AI
16x Prompt
AiAssistWorks
C
Claude Max
Double
Fine
Fynix
GoCodeo
Kotlin
LLMBear
Mammouth AI
NinjaTools.ai
Qodo
R
Requesty
Sider
Supermaven

Integrations Supported

Amazon Bedrock
Claude
Vertex AI
16x Prompt
AiAssistWorks
C
Claude Max
Double
Fine
Fynix
GoCodeo
Kotlin
LLMBear
Mammouth AI
NinjaTools.ai
Qodo
R
Requesty
Sider
Supermaven

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Pricing Information

Free
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Anthropic

Date Founded

2021

Company Location

United States

Company Website

www.anthropic.com/news/claude-opus-4-1

Company Facts

Organization Name

Anthropic

Date Founded

2021

Company Location

United States

Company Website

www.anthropic.com

Categories and Features

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Claude Sonnet 4

Anthropic