Explore Claude Opus 4.1 by Anthropic

Optimize coding and reasoning with Claude Opus 4.1.

Input: image · text · file Output: text Context: 200,000 tokens Release: 2025-08-05

Claude Opus 4.1, released by Anthropic on August 5, 2025, is a versatile AI model designed for enhanced performance in coding, reasoning, and agentic tasks. With a substantial context window of up to 200,000 tokens, this model supports both text and image inputs, producing text outputs. It excels in multi-file code refactoring, debugging precision, and detail-oriented reasoning, making it suitable for tasks involving research and data analysis. The model's capabilities are further enhanced by its ability to handle extended thinking and tool-assisted reasoning, making it a valuable tool for complex problem-solving.

Use Cases

Here are a few ways teams apply Anthropic: Claude Opus 4.1 in practice—from fast drafting to multimodal understanding. Adapt these ideas to your workflow.

Refactor and debug multi-file code efficiently

Conduct detailed data analysis

Engage in extended research projects

Utilize tool-assisted reasoning for complex tasks

Key Features

A quick look at the capabilities that make this model useful in real projects.

Improved performance in coding tasks

Supports reasoning and agentic tasks

Handles up to 200,000 tokens

Text and image input, text output

Enhanced multi-file code refactoring

Specs

Overview

Vendor
anthropic

Model ID
anthropic/claude-opus-4.1

Release
2025-08-05

Modalities & context

Input
image · text · file

Output
text

Context
200,000 tokens

Parameters & defaults

Supported parameters: include_reasoning, max_tokens, reasoning, stop, temperature, tool_choice, tools, top_k, top_p

Defaults: temperature 0.2, top_p 0.95

Benchmark tests: Anthropic: Claude Opus 4.1

We ran this model against a few representative prompts to show its range. Review the outputs below and be the judge.

Text

Prompt:

Write 150 words on how AI might positively upend work, leisure and creativity

AI promises to fundamentally transform how we work, play, and create in profoundly positive ways. In the workplace, AI could eliminate repetitive drudgery, allowing humans to focus on meaningful problem-solving and interpersonal connections. Instead of replacing workers, AI might become the ultimate collaborator—handling data analysis while we provide wisdom, ethics, and emotional intelligence. Leisure could become more enriching as AI personalizes experiences, from crafting perfect travel itineraries to recommending unexplored hobbies that match our hidden interests. AI tutors could make learning new skills accessible to everyone, democratizing education and self-improvement. In creativity, AI won't replace artists but could become a powerful muse and tool. Musicians might jam with AI bandmates, writers could brainstorm with tireless AI collaborators, and visual artists might paint with algorithms as their brush. By handling technical execution, AI could free creators to focus purely on vision and emotion. Rather than threatening human purpose, AI might liberate us to become more human—more creative, connected, and fulfilled.

Run this prompt on Upend.AI

Image

Prompt:

Generate an SVG of a pelican riding a bicycle.

Run this prompt on Upend.AI

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Chat with Claude Opus 4.1

up.end

/ˌəpˈend/

verb

To “upend” means to completely disrupt, overturn, or drastically change the established order or structure of something. It implies a significant shift or alteration that can potentially have far-reaching consequences. When something is upended, it is turned upside down or transformed in a way that challenges conventional norms or expectations. The term often carries a sense of innovation, transformation, and sometimes even a hint of upheaval, indicating that the changes are not just minor adjustments but rather a fundamental reimagining of the status quo.

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