Claude Opus 4.6 (Fast)
VerifiedAnthropic's fast multimodal model for large-scale text and image tasks.
About Claude Opus 4.6 (Fast)
Claude Opus 4.6 (Fast) is a proprietary model from Anthropic. It supports multimodal inputs including text, images, and files. The architecture includes a 1,000,000-token context window and is optimized for speed.
Its design prioritizes efficient handling of extensive combined text and visual data. The model remains closed-weight with no public parameter count disclosed. This enables deployment in environments where response latency matters.
Typical usage involves building applications that analyze long documents alongside images or files. Developers integrate it for tasks requiring both breadth of context and quick multimodal inference.
Capabilities
How Claude Opus 4.6 (Fast) compares
Claude Opus 4.6 (Fast) (striped bar) vs other multimodal on intelligence, speed and price.
Price
USD per 1M output tokens · Lower is better · Claude Opus 4.6 (Fast) ranks #66 of 67
Sources: Artificial Analysis (intelligence, speed) · OpenRouter (price).
Best for
Long-form multimodal document review
Processes million-token inputs containing text, diagrams, and images to extract insights across entire reports or research papers in a single pass.
Rapid visual reasoning tasks
Delivers fast responses on combined image and text queries such as UI screenshots paired with detailed instructions or data visualizations.
Extended coding sessions with assets
Maintains context across large codebases while interpreting related images like architecture diagrams or mockups for iterative development.
Strengths & limitations
Strengths
- +Strong reasoning depth
- +Effective large-context handling
- +Safety-conscious responses
- +Fast inference for its class
Limitations
- –May refuse borderline requests
- –Conservative output style
- –Vision limited to static images
Pricing by provider
Live per-provider pricing & uptime, routed via OpenRouter. Prices are USD per 1M tokens.
| Provider | Input /1M | Output /1M | Context | Uptime |
|---|---|---|---|---|
| Anthropic | $30.00 | $150.00 | 1000K | — |
Cost calculator
Estimate what Claude Opus 4.6 (Fast) would cost for your usage.
Based on Claude Opus 4.6 (Fast)'s $30.00/1M input · $150.00/1M 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-fast",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(completion.choices[0].message.content);Model slug: anthropic/claude-opus-4.6-fast
Editor's verdict
Claude Opus 4.6 (Fast) is Anthropic's proprietary multimodal with a 1000K-token context window.
At $150.00 per 1M output tokens, it is premium-priced for its class, served by 1 provider.
It is available through Anthropic's API and aggregators like OpenRouter.
Best suited to strong reasoning depth and effective large-context handling.
Frequently asked questions
The model supports a 1,000,000 token context window.
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.