Explore DeepSeek V3.1 AI Model

Advanced reasoning and coding with DeepSeek V3.1.

Input: text Output: text Context: 163,800 tokens Release: 2025-08-21

DeepSeek V3.1, released by DeepSeek on August 21, 2025, is a sophisticated text-to-text AI model designed for enhanced reasoning and coding tasks. With a substantial context window of 128K tokens, it allows users to engage in both thinking and non-thinking modes, adjustable via prompt templates. The model's hybrid reasoning capabilities are powered by 671 billion parameters, with 37 billion active, ensuring efficient and accurate outputs. Users can control its reasoning behavior using specific parameters, making it versatile for various applications. DeepSeek V3.1 excels in tool use, code generation, and structured agent workflows, supporting text inputs and outputs effectively.

Use Cases

Here are a few ways teams apply DeepSeek: DeepSeek V3.1 (free) in practice—from fast drafting to multimodal understanding. Adapt these ideas to your workflow.

Enhance research with structured tool use

Improve coding efficiency with code agents

Enable flexible reasoning for complex tasks

Support agentic workflows in various domains

Key Features

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

Hybrid reasoning with 671B parameters

128K token context window

Supports thinking and non-thinking modes

Efficient FP8 microscaling inference

Structured tool and code agent support

Specs

Overview

Vendor
deepseek

Model ID
deepseek/deepseek-chat-v3.1:free

Release
2025-08-21

Modalities & context

Input
text

Output
text

Context
163,800 tokens

Parameters & defaults

Supported parameters: include_reasoning, max_tokens, reasoning, seed, stop, temperature

Defaults: temperature 0.2, top_p 0.95

Benchmark tests: DeepSeek: DeepSeek V3.1 (free)

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

DeepSeek V3.1 is an advanced AI-driven search tool designed to enhance information retrieval across various datasets. It utilizes deep learning algorithms to analyze and index content, allowing users to perform complex queries and obtain relevant results efficiently. Typical use cases include academic research, data analysis, and content management, where users need to extract specific information from large volumes of text. The tool supports multiple data formats and integrates with various platforms, making it versatile for different environments. However, users should be aware of potential limitations, such as the need for a stable internet connection for optimal performance and the possibility of inaccuracies in results depending on the quality of the indexed data. Overall, DeepSeek V3.1 aims to streamline the search process while providing users with a robust framework for data exploration.

Run this prompt on Upend.AI

Ready to try DeepSeek: DeepSeek V3.1 (free)?

Chat with DeepSeek V3.1

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.

Privacy Terms