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Description

Claude Sonnet 5.5 is a general-purpose AI model from Anthropic built for everyday professional tasks, agentic coding, knowledge work, and fast iteration. It is the second model in the Claude 5.5 family and is intended to complement Claude Opus 5.5 by offering lower-cost performance on more clearly defined workloads. Anthropic reports that Sonnet 5.5 generates output more than 30% faster than Sonnet 5 and usually completes tasks with fewer tokens. Pricing remains $2 per million input tokens and $10 per million output tokens, with cache reads priced at $0.20 per million tokens. On Terminal-Bench 4.0, the model scores 70.6%, compared with 10.3% for Sonnet 5, while also posting sizable improvements on FrontierCode, CursorBench, and other coding benchmarks. Its knowledge-work results are also substantially stronger, including a GDPval-AA score of 1844 and an AA-Briefcase score of 1811, both close to Claude Opus 5.5. Anthropic says early testers found the model faster, more collaborative, more concise, and particularly strong at design-oriented work such as polished interfaces and presentation decks. The model supports adjustable effort levels so users can trade off speed and cost against more extended reasoning and checking. Claude Sonnet 5.5 is available through Claude apps, Claude Code, the Claude Platform, and major cloud providers including AWS, Google Cloud, and Microsoft Azure.

Description

II-Agent is an open-source intelligent assistant created by Intelligent Internet, aimed at boosting productivity in various fields like research, content generation, data analysis, programming, automation, and troubleshooting. It functions through a sophisticated function-calling framework powered by a notable large language model, specifically Anthropic's Claude 3.7 Sonnet, and benefits from advanced planning, thorough execution capabilities, and smart context management. The architecture of the agent includes a central component for reasoning and orchestration that connects directly with the LLM, employing system prompts, managing interaction history, and intelligently handling context to ensure a seamless and effective workflow. The features of II-Agent span multistep web searches, source verification, organized note-taking, quick summarization, drafting blogs and articles, creating lesson plans, producing creative writing, developing technical manuals, and even building websites. This wide range of functionalities allows users to tackle diverse tasks more efficiently and creatively.

API Access

Has API Yes 

API Access

Has API No 

Screenshots View All

Screenshots View All

Integrations

AiAssistWorks Yes 
Amazon Bedrock Yes 
App0 Yes 
Claude Science Yes 
Clawd.run Yes 
Cody Yes 
GitHub Yes 
GitHub Copilot Yes 
Java Yes 
Lovable Yes 
Model Context Protocol (MCP) Yes 
Node.js Yes 
PhpStorm Yes 
PowerShell Yes 
Replit Yes 
Solidity Yes 
Versuno Yes 
Visual Basic Yes 
WebStorm Yes 
YAML Yes 

Integrations

AiAssistWorks No 
Amazon Bedrock No 
App0 No 
Claude Science No 
Clawd.run No 
Cody No 
GitHub No 
GitHub Copilot No 
Java No 
Lovable No 
Model Context Protocol (MCP) No 
Node.js No 
PhpStorm No 
PowerShell No 
Replit No 
Solidity No 
Versuno No 
Visual Basic No 
WebStorm No 
YAML No 

Pricing Details

$2 per 1M tokens (input)
$2 per million input tokens and $10 per million output tokens.

Cache reads, which account for most costs in agentic and coding workloads, are priced at just $0.20 per million tokens
Free Trial No 
Free Version No 

Pricing Details

No price information available.
Free Trial No 
Free Version No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

Anthropic

Founded

2021

Country

United States

Website

claude.ai

Vendor Details

Company Name

Intelligent Internet

Country

United States

Website

ii.inc/web/blog/post/ii-agent

Product Features

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Alternatives

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