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About

Claude Sonnet 5.5 is Anthropic’s mid-tier Claude 5.5 model designed for fast, well-scoped everyday work, coding, and professional document creation. Anthropic says it runs more than 30% faster than Claude Sonnet 5 and typically costs up to 30% less per task while keeping the same base token pricing. The model shows major gains in agentic coding, with a 70.6% score on Terminal-Bench 4.0 and stronger performance on FrontierCode and CursorBench than its predecessor. Sonnet 5.5 also performs strongly on knowledge work, computer use, chart understanding, and long-horizon tasks, in some cases approaching Claude Opus 5.5 at higher effort settings. Anthropic positions it as especially useful for debugging, routine coding, collaboration, and producing polished documents, slides, spreadsheets, and user interfaces. Claude Sonnet 5.5 is available across Anthropic’s platforms as well as AWS, Google Cloud, and Microsoft Azure.

About

Stableoutput is a user-friendly AI chat client that allows users to interact with popular AI models like OpenAI's GPT-4o and Anthropic's Claude 3.5 Sonnet without requiring coding knowledge. It operates on a bring-your-own-key model, meaning users utilize their own API keys, which are securely stored in the browser's local storage; these keys are not transmitted to Stableoutput's servers, ensuring privacy and security. The platform offers features such as cloud synchronization, a usage tracker to monitor API consumption, customization options for system prompts, and model settings like temperature and maximum tokens. Users can upload PDFs, images, and code files for AI analysis, facilitating more personalized and context-aware interactions. Additional functionalities include pinning and sharing chats with controlled visibility and managing message requests to optimize API usage. Stableoutput provides lifetime access with a one-time payment.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Developers, knowledge workers, analysts, business teams, and organizations that want a fast, capable, and relatively cost-efficient AI model for coding, professional work, design-heavy tasks, document creation, and everyday agentic workflows

Audience

Researchers wanting a tool to analyze documents and datasets without the need for coding expertise

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

$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 Version Not Supported
Free Trial Not Supported

Pricing

$29 one-time payment
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 5.0 / 5

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Pros & Cons from Real Users

Pros

  • I can give it a normal development task and it tends to get to the answer with less wandering, fewer unnecessary tool calls, and less back-and-forth than Sonnet 5. Coding is where I notice the improvement the most. It is really good for feature work, fixing bugs, refactoring, and the everyday engineering tasks where I want something fast and capable without automatically reaching for Opus. The speed is another big advantage. Sonnet 5.5 feels better suited to rapid iteration because I can make a change, test it, adjust the prompt, and keep moving without the slower pace I sometimes get from heavier reasoning models.

Cons

  • The main downside is that I would still move up to Opus 5.5 for really messy architecture problems, long autonomous agent runs, or tasks where I want maximum reasoning depth.

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Supported

Company Information

Anthropic
Founded: 2021
United States
claude.ai

Company Information

Stableoutput
Indonesia
stableoutput.com

Alternatives

Alternatives

Claude Sonnet 4

Claude Sonnet 4

Anthropic

Categories

AI Coding Models Supported
AI Models Supported
AI Vision Models Supported
Foundation Models Supported
Multimodal Models Supported

Categories

AI Tools Supported

Integrations

Claude Supported
CSS Supported
Claude Cowork Supported
Claude Desktop Supported
Devin Supported
Emergent Supported
Factory Droid Supported
GPT-4 Not Supported
Gemini Enterprise Agent Platform Supported
GitAuto Supported
GitHub Copilot CLI Supported
Microsoft Foundry Supported
Model Context Protocol (MCP) Supported
OpenClaw Supported
Perplexity Pro Supported
Python Supported
Rust Supported
Springhub Supported
Swift Supported
Versuno Supported

Integrations

Claude Supported
CSS Not Supported
Claude Cowork Not Supported
Claude Desktop Not Supported
Devin Not Supported
Emergent Not Supported
Factory Droid Not Supported
GPT-4 Supported
Gemini Enterprise Agent Platform Not Supported
GitAuto Not Supported
GitHub Copilot CLI Not Supported
Microsoft Foundry Not Supported
Model Context Protocol (MCP) Not Supported
OpenClaw Not Supported
Perplexity Pro Not Supported
Python Not Supported
Rust Not Supported
Springhub Not Supported
Swift Not Supported
Versuno Not Supported
Claim Claude Sonnet 5.5 and update features and information
Claim Claude Sonnet 5.5 and update features and information
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