Anthropic
Claude Fable 5.1
claude-fable-5.1
Total Context
1M
Max Output
128K
Released
N/A
Input$10 / M tokens
Output$50 / M tokens
Claude Opus 5.5
claude-opus-5.5Claude Opus 5.5 is Anthropic's flagship intelligence model, designed for demanding workloads that require deep reasoning, reliability, and long-running task execution. It delivers strong performance in software engineering, agentic workflows, professional analysis, and knowledge-intensive tasks. With improved efficiency and enhanced safeguards, Claude Opus 5.5 is optimized for developers building sophisticated AI applications that require consistent performance across complex tasks.
Context Window
1M tokens
Maximum Output
128K tokens
Release Date
Sep 22, 2026
Modalities
Claude Opus 5.5 Pricing
| Input Price | Output Price | Cache Read | Cache Create 5m |
|---|---|---|---|
| $4/M | $20/M | $0.2/M | $5/M |
Claude Opus 5.5 API Capabilities
Reasoning
Supported
Tool calling
Supported
Temperature parameter
Not supported
Attachments
Supported
Knowledge Base
2026-06-01
Endpoint Protocols
Completions APIResponses APIMessages API
Model Highlights
The model’s key strengths.
Agentic Coding
Anthropic reports strong results on long-running coding tasks.
Token Efficiency
Anthropic reports lower cost per task and faster output than Opus 5.
Clear Communication
Anthropic says its writing is clearer and follows style instructions more closely.
Use Cases
Practical workloads for this model.
Codebase Migration
Plan and implement large changes across many files or repositories.
Research Reports
Gather evidence, check claims, and draft source-grounded reports.
Computer Workflows
Carry out multi-step work in supported computer-use environments.
How to Use Claude Opus 5.5 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)Claude Opus 5.5 Benchmarks
| Index score | ||
|---|---|---|
| Artificial Analysis Intelligence Index | Artificial Analysis broad capability aggregate | 57.6 |
Metrics sourced from Artificial Analysis
Claude Opus 5.5 FAQs
Answers to common model questions.
What is Claude Opus 5.5?+
Claude Opus 5.5 is Anthropic’s model for long-running agentic coding and knowledge work.
What is Claude Opus 5.5 best for?+
Use it for codebase-wide work, research reports, and supported computer tasks.
Why choose Claude Opus 5.5?+
Anthropic reports stronger agentic coding, clearer writing, and better task efficiency than Opus 5.
What tradeoffs should I consider?+
Long tasks still need review; migrations from Opus 5 must account for documented API changes.
How do I use Claude Opus 5.5 through TokenHub?+
If it is listed in your TokenHub account, use the exact model ID and endpoint shown there with your credentials.
How should I check pricing and availability?+
Check the live TokenHub model page for your account’s availability and rates; provider prices may differ from TokenHub billing.
Ready to use Claude Opus 5.5?
Use one API key to access Claude Opus 5.5 and more AI models through TokenHub.
Claude Opus 5.5 Media and Demos
Selected public posts and videos about Claude Opus 5.5.
X (Twitter)
Reddit
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