Anthropic
Claude Opus 5.5
claude-opus-5.5
Total Context
1M
Max Output
128K
Released
N/A
Input$4 / M tokens
Output$20 / M tokens
Claude Sonnet 5.5
claude-sonnet-5.5Claude Sonnet 5.5 is a next-generation AI model designed for advanced reasoning, coding, analysis, and complex agentic workflows. It delivers strong performance across software development, long-context understanding, multimodal tasks, and professional knowledge work, offering a balanced combination of intelligence, speed, and efficiency. With enhanced reasoning capabilities and improved instruction following, Claude Sonnet 5.5 excels at writing and debugging code, analyzing complex documents, solving multi-step problems, and powering AI agents that require reliable decision-making and tool usage.
Context Window
1M tokens
Maximum Output
128K tokens
Release Date
Sep 28, 2026
Modalities
Claude Sonnet 5.5 Pricing
| Input Price | Output Price | Cache Read | Cache Create 5m |
|---|---|---|---|
| $2/M | $10/M | $0.2/M | $2.5/M |
Claude Sonnet 5.5 API Capabilities
Reasoning
Supported
Tool calling
Supported
Temperature parameter
Not supported
Attachments
Supported
Knowledge Base
2026-06-01
Endpoint Protocols
Messages API
Claude Sonnet 5.5 Model Highlights
The strengths of Claude Sonnet 5.5 for everyday development and professional work.
Faster Iteration
Anthropic reports output generation over 30% faster than Claude Sonnet 5, supporting quick revision cycles.
Task Efficiency
It uses fewer tokens for typical tasks; Anthropic reports up to 30% lower cost per task than Claude Sonnet 5.
Agentic Coding
Anthropic reports substantial gains over Claude Sonnet 5 on agentic coding evaluations and highlights bug fixing.
Polished Work Products
Anthropic highlights clearer writing, polished documents, slides, spreadsheets, and an eye for design.
Claude Sonnet 5.5 Use Cases
Practical workloads suited to Claude Sonnet 5.5.
Bug Fixing
Investigate a defined software defect, propose a patch, and review the result before merging.
UI Prototyping
Create and refine user interface concepts for a specific product brief.
Business Deliverables
Draft and polish documents, slide decks, and spreadsheets for everyday professional tasks.
Rapid Revisions
Iterate on clearly scoped writing or design feedback through short review cycles.
How to Use Claude Sonnet 5.5 via the TokenHub API
curl 'https://us-api.tokenhub.com/v1/messages' \
-X 'POST' \
-H "Authorization: Bearer $TOKENHUB_API_KEY"Claude Sonnet 5.5 Benchmarks
| Index score | ||
|---|---|---|
| Artificial Analysis Intelligence Index | Artificial Analysis broad capability aggregate | 40.7 |
Metrics sourced from Artificial Analysis
Claude Sonnet 5.5 FAQs
Answers about Claude Sonnet 5.5 capabilities, use, and pricing.
What is Claude Sonnet 5.5?+
It is Anthropic's Sonnet model for fast, well-scoped everyday work, coding, and professional content.
What tasks suit Claude Sonnet 5.5?+
Anthropic highlights bug fixing, everyday tasks, polished documents, slides, spreadsheets, and design work.
What are its main strengths?+
Compared with Claude Sonnet 5, Anthropic reports faster output, lower cost per typical task, and better agentic coding performance.
What tradeoffs should I consider?+
Higher reasoning effort can use more tokens. Review important outputs; Anthropic says Claude Opus 5.5 remains stronger for complex, open-ended judgment.
How do I use Claude Sonnet 5.5 through TokenHub?+
If TokenHub lists it, select claude-sonnet-5.5 and use the endpoint and credentials shown in your account. Anthropic's direct API ID is claude-sonnet-5-5.
What are its price and availability?+
Anthropic lists $2 per million input tokens and $10 per million output tokens on its platform. Check TokenHub for its own rate and availability.
When should I choose it over Claude Opus 5.5?+
Choose Claude Sonnet 5.5 for defined tasks and fast iteration; consider Claude Opus 5.5 when a task needs sustained, complex judgment.
Ready to use Claude Sonnet 5.5?
Use one API key to access Claude Sonnet 5.5 and more AI models through TokenHub.
Claude Sonnet 5.5 Media and Demos
Verified public posts and videos about Claude Sonnet 5.5.
X (Twitter)
Reddit
YouTube