Kimi K2 Thinking by MoonshotAI: Advanced Reasoning at Scale

Unlock complex reasoning with Kimi K2 Thinking's extensive capabilities.

Input: text Output: text Context: 262,144 tokens Release: 2025-11-06

Kimi K2 Thinking, released by MoonshotAI on November 6, 2025, is an advanced reasoning model designed for complex tasks. It features a massive context window of 256k tokens, allowing it to handle extensive input and output in text format. This model excels in persistent, step-by-step reasoning, making it ideal for tasks that require dynamic tool invocation and complex workflows. With its ability to maintain stable multi-agent behavior through numerous tool calls, Kimi K2 Thinking is optimized for autonomous research, coding, and writing, supporting a wide range of applications in analytical tasks.

Use Cases

Here are a few ways teams apply MoonshotAI: Kimi K2 Thinking in practice—from fast drafting to multimodal understanding. Adapt these ideas to your workflow.

Autonomous research across diverse subjects

Dynamic coding assistance for developers

Writing support for long-form content creation

Complex analytical task management

Real-time tool invocation for enhanced productivity

Key Features

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

Trillion-parameter Mixture-of-Experts architecture

256k-token context window for extensive tasks

Supports step-by-step reasoning and tool use

Optimized for complex workflows and multi-agent behavior

High inference efficiency for demanding tasks

Specs

Overview

Vendor
moonshotai

Model ID
moonshotai/kimi-k2-thinking

Release
2025-11-06

Modalities & context

Input
text

Output
text

Context
262,144 tokens

Parameters & defaults

Supported parameters: frequency_penalty, include_reasoning, max_tokens, presence_penalty, reasoning, response_format, stop, structured_outputs, temperature, tool_choice, tools, top_p

Defaults: temperature 0.2, top_p 0.95

Benchmark tests: MoonshotAI: Kimi K2 Thinking

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

The MoonshotAI Kimi K2 Thinking model is designed for advanced natural language processing tasks, leveraging deep learning techniques to understand and generate human-like text. It is capable of performing a variety of functions, including text summarization, sentiment analysis, and conversational AI, making it suitable for applications in customer support, content creation, and data analysis. The model can process large volumes of text data efficiently, enabling users to extract insights and automate responses in real-time. However, users should be aware of certain constraints, such as potential biases in generated content based on training data and limitations in understanding context in complex conversations. Additionally, the model may require fine-tuning for specific industry applications to optimize performance. Overall, the Kimi K2 Thinking model offers a versatile solution for organizations seeking to enhance their text-based workflows.

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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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