Claude Opus 4.1
Cloud API • Released 2024-01-01 • Last Verified 2026-08-06
Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks. It achieves 74.5% on SWE-bench Verified and shows notable gains...
Plain English Summary (What is this model & who is it for?)
Think of Claude Opus 4.1 as a versatile AI assistant for writing, research, and brainstorming. It helps you draft emails, write essays, summarize long articles, and generate creative ideas on any topic.
💡 Real-World Use Cases & Practical Examples
🚀 How to Run & Use This Model (Step-by-Step Guide)
Simple setup instructions for everyday users and developers.
Sign Up & Get API Access
Create a account on Anthropic's official developer portal and obtain your API Key.
Try the Interactive Playground
Click the "Try Playground" button at the top of this page to test prompts instantly inside your web browser.
Send Your First Request
Use standard HTTP cURL requests or official Python/Node.js SDKs to send prompts to the endpoint.
Integrate Into Your App
Pass the model ID "openrouter-anthropic-claude-opus-4-1" into your code payload to power chatbots, workflows, and web applications.
Benchmark Performance
Strengths
- •Cloud API Endpoint
- •Instant Inference
- •Zero Hardware Setup
Limitations & Weaknesses
- •Requires API Key & Per-Token Pricing
import openai
client = openai.OpenAI()
response = client.chat.completions.create(
model="openrouter-anthropic-claude-opus-4-1",
messages=[
{"role": "system", "content": "You are an expert AI assistant."},
{"role": "user", "content": "Explain quantum computing in 2 sentences."}
]
)
print(response.choices[0].message.content)Pricing Overview
Prices subject to provider tiers and volume discounts. Check documentation for current token rates.
Model Tags
Did this model work for you?
Your feedback helps others find the right model.
Similar Models from Anthropic
Claude 3.5 Sonnet
Frontier LLM
Claude 3.5 Sonnet by Anthropic - Frontier LLM engineered for high safety, reasoning, and long context.
Claude 3.5 Haiku
Lightweight LLM
Claude 3.5 Haiku by Anthropic - Lightweight LLM engineered for high safety, reasoning, and long context.
Claude 3 Opus
Frontier LLM
Claude 3 Opus by Anthropic - Frontier LLM engineered for high safety, reasoning, and long context.