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What is Hermes 4?

Hermes 4 marks a significant leap forward in Nous Research's lineup of neutrally aligned, steerable foundational models, showcasing advanced hybrid reasoners capable of seamlessly shifting between creative, expressive outputs and succinct, efficient answers tailored to user needs. This model is designed to emphasize user and system commands above any corporate ethical considerations, resulting in a more conversational and engaging interaction style that avoids sounding overly authoritative or ingratiating, while also promoting opportunities for imaginative roleplay. By incorporating a specific tag in prompts, users can unlock a higher level of reasoning that is resource-intensive, enabling them to tackle complex problems without sacrificing efficiency for simpler inquiries. With a training dataset that is 50 times larger than that of Hermes 3, much of which has been synthetically generated through Atropos, Hermes 4 shows significant performance improvements. This evolution not only enhances accuracy but also expands the scope of applications for which the model can be utilized effectively. Furthermore, the increased capabilities of Hermes 4 pave the way for innovative uses across various domains, demonstrating a strong commitment to advancing user experiences.

What is Claude Opus 4.5?

Claude Opus 4.5 represents a major leap in Anthropic’s model development, delivering breakthrough performance across coding, research, mathematics, reasoning, and agentic tasks. The model consistently surpasses competitors on SWE-bench Verified, SWE-bench Multilingual, Aider Polyglot, BrowseComp-Plus, and other cutting-edge evaluations, demonstrating mastery across multiple programming languages and multi-turn, real-world workflows. Early users were struck by its ability to handle subtle trade-offs, interpret ambiguous instructions, and produce creative solutions—such as navigating airline booking rules by reasoning through policy loopholes. Alongside capability gains, Opus 4.5 is Anthropic’s safest and most robustly aligned model, showing industry-leading resistance to strong prompt-injection attacks and lower rates of concerning behavior. Developers benefit from major upgrades to the Claude API, including effort controls that balance speed versus capability, improved context efficiency, and longer-running agentic processes with richer memory. The platform also strengthens multi-agent coordination, enabling Opus 4.5 to manage subagents for complex, multi-step research and engineering tasks. Claude Code receives new enhancements like Plan Mode improvements, parallel local and remote sessions, and better GitHub research automation. Consumer apps gain better context handling, expanded Chrome integration, and broader access to Claude for Excel. Enterprise and premium users see increased usage limits and more flexible access to Opus-level performance. Altogether, Claude Opus 4.5 showcases what the next generation of AI can accomplish—faster work, deeper reasoning, safer operation, and richer support for modern development and productivity workflows.

Media

Media

Integrations Supported

.NET
Amazon Bedrock
Augment Code
CLion
Cursor
Doraverse
HTML
IntelliJ IDEA
JavaScript
Lovable
Microsoft Foundry
PhpStorm
Python
Ruby
Scalestack
Skymel
Springhub
Twigg
TypeScript
Verdent

Integrations Supported

.NET
Amazon Bedrock
Augment Code
CLion
Cursor
Doraverse
HTML
IntelliJ IDEA
JavaScript
Lovable
Microsoft Foundry
PhpStorm
Python
Ruby
Scalestack
Skymel
Springhub
Twigg
TypeScript
Verdent

API Availability

Has API

API Availability

Has API

Pricing Information

Free
Free Trial Offered?
Free Version

Pricing Information

Pricing not provided.
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

Nous Research

Date Founded

2023

Company Location

United States

Company Website

hermes4.nousresearch.com

Company Facts

Organization Name

Anthropic

Date Founded

2021

Company Location

United States

Company Website

www.anthropic.com/news/claude-opus-4-5

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