Claude Opus 4.6
VerifiedAnthropic's closed multimodal model with a million-token context window.
About Claude Opus 4.6
Developed as a proprietary system by Anthropic, Claude Opus 4.6 integrates vision and language capabilities in a single architecture. Its one-million-token context supports analysis of lengthy documents alongside visual content without truncation. The model remains closed-weight and is accessed through API endpoints.
Strengths center on sustained coherence across extended multimodal inputs such as reports with embedded charts or multi-page image sets. It handles file uploads directly, enabling workflows that mix textual instructions with visual references. Typical usage includes research synthesis, document review, and content generation that requires cross-referencing large volumes of material.
Capabilities
How Claude Opus 4.6 compares
Claude Opus 4.6 (striped bar) vs other multimodal on intelligence, speed and price.
Price
USD per 1M output tokens · Lower is better · Claude Opus 4.6 ranks #107 of 124
Sources: Artificial Analysis (intelligence, speed) · OpenRouter (price).
Best for
Analyzing lengthy legal or research documents
Its 1,000,000-token context window supports ingesting entire contracts, case files, or multi-paper literature reviews for extraction of key arguments and cross-references.
Developing and reviewing large codebases
The model performs code generation, debugging, and architectural analysis across extensive repositories while following detailed technical specifications.
Interpreting multimodal inputs for reports
Multimodal understanding allows simultaneous processing of text, charts, and images to produce integrated explanations and summaries from mixed-media sources.
Strengths & limitations
Strengths
- +Strong performance on nuanced reasoning tasks
- +Careful and safety-aligned responses
- +Effective handling of large inputs
- +High-quality structured outputs
Limitations
- –Slower response times on complex queries
- –More conservative on borderline topics
- –No native real-time web access
Cost calculator
Estimate what Claude Opus 4.6 would cost for your usage.
Based on Claude Opus 4.6's $5.00/1M input · $25.00/1M 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-4.6",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(completion.choices[0].message.content);Model slug: anthropic/claude-opus-4.6
Editor's verdict
Claude Opus 4.6 is Anthropic's proprietary multimodal with a 1000K-token context window.
At $25.00 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 nuanced reasoning tasks and careful and safety-aligned responses.
Frequently asked questions
The model provides a context window of 1,000,000 tokens.
User reviews
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