Kimi K2 is an open source AI model developed by Moonshot AI, a technology company in China with backing from Alibaba.
Kimi K2 is a new release as of July 2025 and was created to assist developers, data scientists, and engineers with automation, code generation, and data analysis.
Kimi K2 utilizes a Mixture of Experts (MoE) architecture that activates 32 billion parameters out of a total of 1 trillion, allowing for efficient computation and applicability for mixed workflows.
Key Features
- Advanced Coding
Kimi K2 is an advanced coding assistant. It is proven effective with a 65.8% score on the SWE-Bench Verified benchmark, beating the score of GPT-4.1.
Kimi K2 works with all major programming languages and can autonomously write, debug and optimize code, which makes it a powerful assistant for developers.
Multi-Step Automation
Within the software space, the model is able to activate multiple different tools and APIs, making Kimi K2 agentic and useful for automating complex workflows such as data analysis, report generation, or system monitoring, no human needed.
Context Window
The model has a very large context window of 128,000 tokens that makes Kimi K2 useful for understanding long documents, which is helpful for comprehension of large amounts of text.
Open-Source, Inexpensive
Kimi K2 is free to use via Moonshot’s app (or browser interface).
The Kimi K2 pricing for commercial-scale usage is also extremely favorable: 15 cents per million input tokens and $2.50 per million output tokens. This pricing structure is highly favorable to other competitors.
Pricing Structure
Kimi K2 has an attractive pricing structure as follows:
Input Tokens: $0.15 per million
Output Tokens: $2.50 per million
This pricing is far less than competitors, which is attractive to developers and businesses seeking to build AI capabilities at a reasonable cost.
Pros
Competitively priced
Open source and customizable
Performs well when coding and automating tasks
Large context window for processing bigger documents
Agentic behavior allows automation of multi step tasks
Cons
Text based (not multimodal)
Requires technical expertise in order to set up and operate effectively
May require a specific commercial license to use commercially
Website and Social Media Activity
Moonshot AI’s website had roughly 10 million unique visitors in July 2025. The company has a growing social media presence, with a collective following of over a half million across several channels.
Conclusion
Kimi K2 is a strong, cost effective and open source AI-smart tool that any developer or business looking to enhance their coding, automation and data analysis needs will find useful.
With its advanced features, low cost and open-source capabilities, Kimi K2 is a promising up and coming model within the AI landscape.
