Anthropic
Claude Sonnet 5.5
claude-sonnet-5.5
Total Context
1M
Max Output
128K
Released
N/A
Input$2 / M tokens
Output$10 / M tokens
Claude Sonnet 4.5
claude-sonnet-4.5Claude Sonnet 4.5 is highlighted by Anthropic as a leading coding model and one of the strongest options for complex agents and computer use. Official launch materials also mention gains in reasoning and math. It should be positioned as a high-value workhorse for software teams and agent applications.
Context Window
200K tokens
Maximum Output
64K tokens
Release Date
Sep 29, 2025
Modalities
Claude Sonnet 4.5 Pricing
| Token Tier | Input Price | Output Price | Cache Read | Cache Create 5m |
|---|---|---|---|---|
| <=200K | $3/M | $15/M | $0.3/M | $3.75/M |
| >200K | $6/M | $22.5/M | $0.6/M | $7.5/M |
Claude Sonnet 4.5 API Capabilities
Reasoning
Supported
Tool calling
Supported
Temperature parameter
Supported
Attachments
Supported
Knowledge Base
2025-07-31
Endpoint Protocols
Completions APIMessages API
Claude Sonnet 4.5 Model Highlights
Claude Sonnet 4.5 combines sustained coding, complex agent execution, computer use and improved reasoning for production applications.
Sustained Coding
Maintains focus through long, multi-step software tasks and tests its own code before completion.
Complex Agent Execution
Plans extended workflows, coordinates actions and preserves task state over lengthy autonomous runs.
Computer-Use Reasoning
Interprets screen states and chooses actions across browser and desktop workflows while reasoning about task goals.
Claude Sonnet 4.5 Use Cases
Claude Sonnet 4.5 is suited to autonomous software development, browser operations and complex domain analysis.
Autonomous Software Development
Plan and execute extended coding tasks, run tests and refine the implementation with limited supervision.
Browser Task Automation
Navigate websites, enter information and complete multi-step browser workflows based on visible interface state.
Specialized Domain Analysis
Examine complex financial, legal, medical or scientific material and produce a reasoned summary for expert review.
How to Use Claude Sonnet 4.5 via the TokenHub API
import OpenAI from "openai"
const client = new OpenAI({
apiKey: process.env.TOKENHUB_API_KEY,
baseURL: "https://us-api.tokenhub.com/v1",
})
const result = await client.chat.completions.create({})
console.log(result.choices[0]?.message?.content)Frequently asked questions about Claude Sonnet 4.5
Understand what Claude Sonnet 4.5 is, its best uses, distinguishing strengths, practical tradeoffs, and safe TokenHub integration guidance.
What kind of model is Claude Sonnet 4.5?+
Claude Sonnet 4.5 is a previous Sonnet generation known for coding, computer use, and complex agent workflows. It remains a defined model generation, but newer models in the same family may be preferable for new evaluations.
What should teams use Claude Sonnet 4.5 for?+
Best-fit scenarios include agentic coding and repository work, computer-use and interface automation, and knowledge work across business documents. Test representative inputs and define measurable acceptance criteria before production.
Where does Claude Sonnet 4.5 have a clear technical advantage?+
Key strengths include strong coding performance, planning across multi-step agent tasks, and strict instruction following. This combination is especially useful for computer-use and interface automation.
When should a team choose another model instead of Claude Sonnet 4.5?+
Consider another model when the project can move to the newer Sonnet generation, the task needs the strongest Opus-level capability, or the workflow cannot include human review for important decisions. Run generated code through tests, security checks, and human review before merging or deployment.
What should be checked before integrating Claude Sonnet 4.5 with TokenHub?+
In TokenHub, select the exact model identifier displayed for Claude Sonnet 4.5, use the endpoint documented for your account, and authenticate with your TokenHub credentials. Check the TokenHub model page for the available Claude features, context limits, tool support, and current model status for your account.
Ready to use Claude Sonnet 4.5?
Use one API key to access Claude Sonnet 4.5 and more AI models through TokenHub.
Media and Discussions
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