Claude Opus 4.1
VerifiedMultimodal reasoning model with extensive context handling.
About Claude Opus 4.1
Developed by Anthropic, Claude Opus 4.1 combines vision and language capabilities in a single architecture. Its 200,000-token context allows processing of lengthy documents alongside visual data. The model remains proprietary with no public parameter count released.
It performs well on tasks requiring integration of textual and visual information over extended sequences. Users apply it to document review, image interpretation, and multi-step reasoning projects. Access occurs through Anthropic's commercial API rather than local deployment.
Capabilities
How Claude Opus 4.1 compares
Claude Opus 4.1 (striped bar) vs other multimodal on intelligence, speed and price.
Price
USD per 1M output tokens · Lower is better · Claude Opus 4.1 ranks #130 of 139
Sources: Artificial Analysis (intelligence, speed) · OpenRouter (price).
Best for
Long Document Analysis
Processes and reasons over large files such as research papers, legal contracts, or technical reports within its 200000-token context window.
Multimodal Reasoning Tasks
Combines vision capabilities with complex instruction following to analyze images alongside text for detailed reports or visual data interpretation.
Advanced Code Development
Supports generation, debugging, and multi-step analysis of intricate codebases while adhering to nuanced technical requirements.
Strengths & limitations
Strengths
- +Strong performance on reasoning-heavy tasks
- +Careful and safety-aligned responses
- +High-quality nuanced writing
- +Effective handling of long documents
Limitations
- –Can be overly cautious with edge-case queries
- –Slower response times on complex inputs
- –No native real-time web access
Cost calculator
Estimate what Claude Opus 4.1 would cost for your usage.
Based on Claude Opus 4.1's $15.00/1M input · $75.00/1M output. Estimate only — actual cost varies by provider and caching.
Quick start
OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. Only the model slug changes between models.
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://openrouter.ai/api/v1",
apiKey: process.env.OPENROUTER_API_KEY,
});
const completion = await client.chat.completions.create({
model: "anthropic/claude-opus-4.1",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(completion.choices[0].message.content);Model slug: anthropic/claude-opus-4.1
Editor's verdict
Claude Opus 4.1 is Anthropic's proprietary multimodal with a 200K-token context window.
At $75.00 per 1M output tokens, it is premium-priced for its class.
It is available through Anthropic's API and aggregators like OpenRouter.
Best suited to strong performance on reasoning-heavy tasks and careful and safety-aligned responses.
Frequently asked questions
The model supports a context length of 200000 tokens for handling extended inputs and conversations.
User reviews
Real, verified reviews from the community shape this model's rating.
Loading reviews…
Other Claude models
Sibling versions in the Claude family from Anthropic.
Similar models
Other multimodal worth comparing.