Kimi K3 Review: Performance & Features

Moonshot AI released its new LLM family, Kimi K.3, on July 16, 2026, shortly after the Kimi K2.7 Code model. Kimi K3 demonstrates significantly improved coding, reasoning, natural language processing, agentic performance, and visual performance compared to its predecessor. Kimi K3 boasts benchmark performance comparable to frontier LLMs like GPT-5.6 Sol and Claude Fable 5. If you're curious about what Kimi K3 is and what it promises, we've got you covered! 

In this article, we'll examine the features and performance of Kimi K3.

TL; DR

Moonshot AI released Kimi K3 on July 16, 2026, a 2.8T-parameter open-source LLM with a 1 million token context window, competing with frontier models like GPT-5.6 Sol, Claude Fable 5, Claude Opus 4.8, and GPT-5.5. It delivers strong performance in long-horizon coding, agentic workflows, reasoning, knowledge work, and vision (81.6% on MMMU-Pro), with kernel optimization for faster, lower-latency execution. New features include advanced visualization (turning text and data into rich visual outputs and websites) and video editing/animation capabilities. API pricing is $3 per million input tokens and $15 per million output tokens, matching Claude Sonnet 5, with $0.30 per million cached input tokens. Free tier access is available through the Kimi AI chatbot, Kimi Work, and Kimi Code apps. Kimi K3 is not GDPR/EU AI Act compliant by default, but TextCortex offers it as an EU-hosted, compliant API and as the engine for custom AI agents and knowledge bases.

What is Kimi K3?

Kimi K3 is an advanced large language model developed by Moonshot AI Studio and released on July 16, 2026. Kimi K3 boasts performance comparable to models like GPT-5.6 Sol, Claude Fable 5, Claude Opus 4.8, and GPT-5.5. Built with 2.8T parameters, Kimi K3 offers a context window of 1 million tokens. It is optimized for tasks such as long-horizon coding, knowledge work, agentic workflows, reasoning, and automation.

Kimi K3 Pricing

You can use the Kimi K3 model for free via the AI ​​chatbot. If you want to use the Kimi K3 model unlimited and at full capacity, you need to subscribe to one of Moonshot AI’s pricing plans, starting at a minimum of $19 per month.

If you want to use the Kimi K3 model as an API, you've come to one of the most controversial issues about the model. Kimi AI models have become popular because they offer much lower pricing and are cheaper alternatives compared to frontier AI models. However, while the Kimi K3 model offers advanced performance, it offers the same pricing as Claude Sonnet 5. The API pricing for the Kimi K3 model is as follows:

• $3 per million input tokens
• $0.30 per million input cache tokens
• $15 per million output tokens

How to Access Kimi K3?

You can access the Kimi K3 model for free through the Kimi AI Chatbot. Additionally, the Kimi K3 model is available in the Kimi Work and Kimi Code apps upon its release. If you want to power your own app with Kimi K3, you can also use it as an API.

Kimi K3 Features & Performance

The Kimi K3 model boasts significantly higher benchmark performance compared to its predecessors. Furthermore, the Kimi K3 comes with several new features. Let's take a closer look at the features and performance of the Kimi K3.

Kimi K3 Benchmark Performance

The Kimi K3 model's coding performance is very close to that of the GPT-5.6 Sol, Claude Sonnet 5, Claude Opus 4.8, and GPT-5.5 models; while it slightly surpasses some and lags behind others, overall output performance is similar. The Kimi K3 model achieves similar scores to competing Frontier models in benchmarks such as Terminal Bench 2.1, FrontierSWE, and DeepSWE.

When it comes to the agentic performance of LLMs, the Kimi K3 model does not lag behind its frontier LLM competitors. In benchmarks used to measure the agentic performance of LLMs, such as BrowseComp, DeepSearchQA, and MCP Atlas, the Kimi K3 model performs similarly to models like GPT-5.6 Sol and Sonnet 5.

Furthermore, the Kimi K3 model does not lag behind its competitors in vision benchmarks. For example, the Kimi K3 model has a score of 81.6% in the MMMU-Pro benchmark.

Kernel Optimization

LLMs are increasingly becoming integrated into daily life and enterprise workflows. As a result, the importance of CPUs and systems effectively running LLMs has increased. Moonshot AI Studio recognizes this and has optimized the Kimi K3 model for maximum performance using the GPU kernel. Thanks to kernel optimization, the Kimi K3 model runs faster and offers lower latency.

Knowledge Work

Kimi K3 demonstrates consistent gains in end-to-end knowledge work and in overcoming recurring challenges across workflows. This performance shows consistent and broad improvement in knowledge work tasks. Thanks to this development method and consistent growth curve, the Kimi K3 model achieves higher scores in knowledge work benchmarks such as Online Exp Bench, DECK-bench, and Finance-bench compared to its competitors, GPT-5.5 and Claude Opus 4.8.

Advanced Visualization

The Kimi K3 model demonstrates accurate and high-quality results in converting textual or visual inputs into visual outputs. For example, you can use the Kimi K3 model to create a website containing 42 years of AI ASIC industry research, complete with all visual elements. Furthermore, the Kimi K3 model will consistently transfer all information and data when creating the website. Another example is using the Kimi K3 model to create a single visual slideshow of hundreds of statistics and reports. If you need to convert large amounts of data and documents into visual outputs, the Kimi K3 model offers the performance you're looking for.

Video Editing

The Kimi K3 model offers motion design, animation, and video editing features because it supports text, visual, code, and video inputs. With the Kimi K3 model, you can create short promotional videos for your product, convert your databases into tutorial or explanatory videos, and add or remove elements from your existing videos.

TextCortex AI: Integrate Kimi K3 into Your Enterprise Workflow

If you want to automate repetitive tasks and save time by integrating a wide range of large language models, including Kimi K3, into your enterprise workflow, TextCortex is the solution for you. TextCortex is a leading knowledge management, workflow automation, and GDPR-compliant API provider that aims to reduce the workload of enterprises by providing them with various AI tools.

Kimi K3 Powered AI Agents

TextCortex's first solution for enterprises is an AI agent framework that can be powered by a wide range of LLMs, including Kimi K3. Using our AI agent framework, you can automate a variety of tasks, from simple to complex and repetitive, such as due diligence, market research, customer email responses, and onboarding. To automate any workflow with TextCortex, you can use our AI agent builder to build an AI agent.

Knowledge Bases

If you want to integrate the knowledge work capabilities of the Kimi K3 model with your enterprise databases, TextCortex knowledge bases are designed for you. With TextCortex knowledge bases, you can connect your internal and online databases with TextCortex and use the AI ​​agents you create for tasks such as AI search and knowledge work. Furthermore, with TextCortex, you can turn your databases into insights, charts, and informative visualizations.

GDPR and EU-AI-Act Compliant API

With TextCortex, you can use a wide range of LLMs, including Kimi K3, as EU-hosted APIs that, by default, do not offer GDPR compliance. Thanks to the TextCortex API, you can integrate any LLM into your enterprise without violating any EU laws. What's more, compliance with GDPR and the EU AI Act enhances the security of LLMs, preventing risks such as prompt injection and LLM poisoning.

Frequently Asked Questions

Is Kimi K3 Chinese?

The Kimi K3 model was developed and released by Moonshot AI Studio, a Chinese company.

Is Kimi K3 fully free?

The Kimi K3 model is a free-to-use model available in limited quantities via the Kimi AI chatbot. However, if you want to use the model as an API, you will need to pay the same API fee as the Sonnet 5 model: $3 per million input tokens and $15 per million output tokens.

Is Kimi K3 open source?

Yes, Kimi K3 is a completely open-source and publicly accessible model.