Deep Technical Coding
With a 92.5% HumanEval score, the 4.1 model manages complex architectural planning and multi-file refactoring, allowing developers to automate technical debt reduction and repository management.
claude-opus-4-1-20250805
The Claude Opus 4.1 API delivers Anthropic’s peak cognitive performance. With a 200k context window and Computer Use 2.0, this 4.1 model excels at multi-step reasoning, complex coding, and nuanced document analysis for high-stakes enterprise agents.
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API
Text To Text
curl --request POST "https://gptproto.com/v1/messages" \
--header "Authorization: Bearer $GPTPROTO_API_KEY" \
--header "Content-Type: application/json" \
--header "anthropic-version: 2023-06-01" \
--data '{
"model": "claude-opus-4-1-20250805",
"max_tokens": 1024,
"messages": [
{
"role": "user",
"content": "Who are you?"
}
]
}'Claude Opus 4.1 API Standout Features
The 4.1 Opus model brings unmatched reasoning and multimodal capabilities to your application.
Advanced Cognitive Reasoning
The 4.1 architecture reduces hallucinations in legal and medical contexts by using state-of-the-art refusal mechanisms, ensuring Claude provides trustworthy synthetic reports for high-stakes tasks.
Visual Logic & Multimodality
Process 200k context windows containing blueprints, charts, and video frames. Claude 4.1 provides high spatial accuracy for visual logic tasks, identifying patterns across massive unstructured sets.
Agentic Computer Use 2.0
Claude 4.1 executes mouse and keyboard commands with 25% fewer errors than previous versions, perfect for building autonomous agents that navigate complex web interfaces and software.
How to Get a claude-opus-4-1-20250805 API Key
Getting a claude-opus-4-1-20250805 API key takes four steps and a few minutes. Create a free GPTProto account, add credits, generate your key, and make your first call — at $12 / $60 it's a cheaper claude-opus-4-1-20250805 API key than going direct, and one key works across every model on the platform. Full claude-opus-4-1-20250805 Documentation is in the docs.
Sign up
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Top up
Your balance can be used across all models on the platform, including claude-opus-4-1-20250805, giving you the flexibility to experiment and scale as needed.
Generate your API key
In your dashboard, create an API key — you'll need it to authenticate when making requests to claude-opus-4-1-20250805.
Make your first API call
Use your API key with our sample code to send a request to claude-opus-4-1-20250805 via GPT Proto and see instant AI-powered results.
Claude Opus 4.1 API FAQ
Find technical answers regarding Claude 4.1 integration, benchmarks, and data privacy on our platform.
How does the Claude Opus 4.1 API differ from direct access?
Using the Claude Opus 4.1 API via GPTProto.com provides a unified OpenAI-compatible endpoint. You gain access to multi-provider failover, centralized billing, and advanced prompt caching (saving up to 90% on repeated context) without a monthly minimum commitment. We provide the same raw performance of the Anthropic 4.1 model but with enterprise-grade orchestration tools and simplified rate limit management for Opus tier intelligence.
Is my data used to train the Claude 4.1 model?
No. Data privacy is a core pillar for Claude. Any data sent through our platform to the Claude Opus 4.1 API is not used for training the model by us or Anthropic. The 4.1 version is Zero Data Retention (ZDR) eligible for enterprise users, making it suitable for processing sensitive legal, medical, or biochemical research documents within its 200,000-token context window without compromising proprietary intellectual property.
What is the typical latency for the Opus 4.1 API?
Claude Opus 4.1 is a high-parameter model optimized for reasoning rather than raw speed. Typical Time to First Token (TTFT) ranges from 1.5s to 3s. For tasks requiring sub-second responses, we recommend Claude 4.1 Haiku. However, for complex multi-step logic and visual analysis, the Opus 4.1 API provides the highest accuracy in the market, outperforming competitors in the 2025 benchmark landscape for deep cognitive work.
How does Claude Opus 4.1 perform on coding benchmarks?
Claude remains a leader in technical execution. On the SWE-bench Verified benchmark, Claude Opus 4.1 achieved a 54.0% score, significantly higher than legacy models. It is specifically designed to handle multi-file refactoring, architectural planning, and bug discovery across large repositories. Developers can use the 4.1 API to build autonomous engineering agents that understand complex dependencies and library integrations natively.
Does the 4.1 API support multi-document analysis?
Yes, Claude excels at synthesizing information across massive datasets. With its 200k context window, you can upload multiple PDFs, layered documents, and even handwritten forms. Claude 4.1 uses visual logic to analyze charts and technical diagrams with high spatial accuracy. This makes it the premier choice for financial modeling and legal synthesis where the model must identify subtle patterns hidden within thousands of pages.
Can I use Claude Opus 4.1 for automated computer use?
The Claude Opus 4.1 API is natively optimized for 'Computer Use 2.0'. This allows Claude to interact with digital interfaces by taking screenshots and issuing keyboard or mouse commands. The 4.1 model shows a 25% improvement in tool-invocation reliability, making it the most stable engine for building agentic workflows that require the model to navigate software, fill forms, and manage administrative tasks autonomously.
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