ModelFoldkimi-k3
Kimi K3 is Moonshot AI’s advanced model built for coding, complex reasoning, long-horizon agentic tasks, and multimodal understanding. With a 1M-token context window, it can work across large codebases, long documents, images, and complex workflows while maintaining extensive context.
Pricing: Input 600 credits / 1M tokens (≈ $3.00), Output 3000 credits / 1M tokens (≈ $15.00).
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Kimi K3 API – Build with Moonshot AI Kimi K3 on ModelFold
Access Kimi K3 API on ModelFold for coding, complex reasoning, agentic workflows, and multimodal tasks. Try Kimi K3 free online, explore its 1M-token context window, and integrate the model into your applications with a developer-friendly API.
What Is the Kimi K3 API
Access the Moonshot AI Kimi K3 Model Through API
The Kimi K3 API gives developers programmatic access to Moonshot AI Kimi K3, a frontier model built for long-horizon coding, complex reasoning, knowledge work, and agentic tasks. The Kimi K3 model combines a 2.8T-parameter architecture, a 1-million-token context window, and native vision capabilities. With the Kimi K3 AI API, developers can bring these capabilities into coding tools, AI agents, research platforms, SaaS products, and other applications without building or hosting the model themselves.
Build with Kimi K3 API Without Local Deployment
Access Kimi K3 through ModelFold API without downloading model weights or managing your own deployment infrastructure. Use the Kimi K3 API for code generation, large codebase analysis, multi-step reasoning, visual understanding, and long-running agent workflows. Go from API testing to production integration without setting up and maintaining the Kimi K3 model yourself.
Explore the Core Capabilities of Kimi K3 API
Handle Long-Horizon Coding with Kimi K3
Build advanced coding workflows with the Kimi K3 API for tasks that go beyond simple code generation. Kimi K3 code capabilities are designed for long engineering sessions, large repository navigation, debugging, code optimization, and complex software development. The model can also work with terminal tools and maintain context across extended tasks, making Kimi K3 coding useful for AI coding assistants, developer tools, and autonomous engineering workflows.
Process Up to 1M Tokens with the Kimi K3 Model
Give your applications more room to work with large amounts of context. The Kimi K3 model supports a context window of up to 1 million tokens, allowing the Kimi K3 API to work across large codebases, long documents, research materials, and extended conversations. Developers can keep more relevant information in a single workflow, reducing the need to split complex tasks into many smaller requests.
Build Agentic Workflows with the Kimi K3 AI API
Use the Kimi K3 AI API to power agents that plan, reason, use tools, and complete multi-step tasks over longer periods. Kimi K3 is built for challenging workflows that require more than a single prompt and response. SaaS builders can use the Kimi API for coding agents, research agents, workflow automation, and other applications that need sustained task execution with less manual intervention.
Combine Native Vision and Reasoning with Kimi AI K3
Build applications that need to understand both visual and text-based information. Kimi AI K3 has native vision capabilities, allowing the Kimi K3 API to reason over screenshots, interfaces, diagrams, and other visual inputs alongside written instructions. This makes it useful for visual debugging, frontend development, UI analysis, technical research, and workflows where images are part of the problem-solving process.
Power Complex Reasoning and Knowledge Work with Kimi K3
Bring Moonshot Kimi K3 into research, analysis, and professional knowledge workflows that involve many sources or multiple reasoning steps. The Kimi K3 API can help analyze long documents, connect information across large contexts, work through complex problems, and produce structured results. Developers can use these capabilities to build research platforms, analytical tools, business applications, and AI-powered productivity products.
Explore Kimi K3 Model Architecture and Technical Highlights
Scale with a 2.8T-Parameter MoE Kimi K3 Model
Moonshot Kimi K3 is a 2.8-trillion-parameter Mixture-of-Experts model built for frontier-scale AI workloads. Instead of activating the entire model for every token, its sparse MoE design routes computation through selected experts. This architecture helps Kimi K3 combine massive model capacity with more efficient computation for coding, reasoning, and long-running tasks.
Extend Context with Kimi Delta Attention and AttnRes
Kimi K3 model combines Kimi Delta Attention (KDA) with Attention Residuals (AttnRes) to improve how information flows across long sequences and deep model layers. This architecture supports a context window of up to 1 million tokens, making Kimi K3 well suited for large codebases, long documents, research, and multi-step workflows.
Combine Native Vision with Kimi K3 Reasoning
Kimi K3 Moonshot AI includes native vision capabilities for understanding visual and text inputs together. Through the Kimi K3 API, developers can work with screenshots, interfaces, diagrams, and other visual content for frontend development, visual debugging, technical analysis, and multimodal applications.
Kimi K3 Benchmark Performance
Kimi K3 Performance Across Coding, Agentic, and Visual Tasks
Kimi K3 benchmark results include evaluations across coding, agentic, and visual tasks. According to Moonshot AI, Kimi K3 scores 88.3 on Terminal-Bench 2.1, 77.8 on Program Bench, and 72.9 on Kimi Code Bench 2.0 for coding-related evaluations. For agentic and visual tasks, Kimi K3 scores 30.8 on AutomationBench and 91.3 on CharXiv (RQ) with tools.
How to Use Kimi K3 API on ModelFold
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Step 1: Try Kimi K3 Free Online in the Playground
Open the ModelFold Playground to access Kimi K3 free online and start testing the model directly in your browser. Enter a prompt to explore Kimi K3 for coding, reasoning, research, long-context tasks, and other workflows without setting up a full API integration first.
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Step 2: Get Your Kimi K3 API Key
Create a ModelFold account and generate your API key from the dashboard. Your key gives you access to the Kimi K3 API so you can start making programmatic requests from your own projects.
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Step 3: Send Your First Kimi K3 API Request
Select Kimi-K3, add your prompt and instructions, and send your first request through the Kimi K3 AI API. Test real tasks such as code generation, repository analysis, complex reasoning, research, or multimodal understanding.
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Step 4: Integrate Kimi K3 API into Your Application
Connect the Kimi K3 API to your SaaS product, AI coding assistant, agent, research tool, or internal workflow. Build on your initial API requests and scale your Kimi API integration as your application grows.
Kimi K3 vs Claude Fable 5.1
Kimi K3 vs Claude Fable 5.1: What’s the Difference?
Kimi K3 and Claude Fable 5.1 are both designed for coding, reasoning, and agentic workflows, but they take different approaches. Kimi K3 is an open 2.8T-parameter MoE model with a 1M-token context window and native vision, making it suitable for large codebases, long documents, and multimodal workflows. Claude Fable 5.1 is a closed model focused on agentic coding, long-running problem solving, knowledge work, and computer-use tasks. Developers can compare both models based on context requirements, task type, performance, and cost.
Access Kimi K3 and Claude Fable 5.1 on ModelFold
Both Kimi K3 API and Claude Fable 5.1 API are available on ModelFold. Developers can test both models and use them for coding agents, research tools, SaaS products, and other AI applications without managing separate provider platforms. This also makes it easier to compare models and choose a different model as application requirements change.
What Can You Build with Kimi K3 API
Build AI Coding Assistants with Kimi K3
Create coding copilots that generate, explain, debug, refactor, and optimize code across complex software projects. With strong Kimi K3 code capabilities and long-context support, developers can build assistants that work with large repositories and extended engineering tasks.
Create Autonomous AI Agents with Kimi K3 API
Use the Kimi K3 API to build AI agents that plan tasks, reason through multiple steps, use tools, and execute longer workflows. Apply these agents to software development, research, automation, and other tasks that require sustained reasoning with less manual input.
Develop AI Research and Analysis Tools
Build research tools that process large volumes of information, analyze long documents, connect findings across sources, and produce structured results. The Kimi K3 model is well suited to research and analysis workflows where context and multi-step reasoning matter.
Power Developer Tools and SaaS Products with Kimi K3 AI API
Integrate the Kimi K3 AI API into IDE extensions, developer platforms, SaaS products, internal tools, and AI-powered productivity apps. Add advanced Kimi capabilities to existing products or use the API as the intelligence layer for a new application.
Build Multimodal AI Applications with Kimi AI K3
Combine text and visual inputs to create applications that understand screenshots, interfaces, diagrams, and other images. Kimi AI K3 can support visual debugging, UI analysis, frontend workflows, technical tools, and other products that need vision and reasoning together.
Automate Professional Knowledge Work with Kimi API
Use the Kimi API to automate complex knowledge tasks across documents, reports, research, data, and business workflows. Build AI applications that organize information, analyze content, generate structured outputs, and support longer professional tasks from start to finish.
Why Choose ModelFold for Kimi K3 API
Access Multiple AI Coding Models in One Place
Build and test with Kimi K3 alongside other leading coding and reasoning models on one API platform. ModelFold makes it easier to compare models, choose the right option for each task, and manage different AI workflows without maintaining separate integrations across multiple providers.
Try Kimi K3 Free with New User Credits
Start exploring Kimi K3 free with credits available to new ModelFold users. Test coding, reasoning, agentic workflows, and other Kimi K3 API capabilities before committing to larger-scale usage.
Get Affordable, Flexible Kimi K3 API Pricing
Pay based on your actual API usage with flexible pricing designed for projects at different stages. Experiment with the Kimi K3 AI API, build prototypes, and scale production workloads without committing to a fixed plan upfront.
Integrate Kimi K3 Easily with Clear API Docs
Move from testing to development with straightforward endpoints, practical examples, and clear documentation. ModelFold helps developers integrate the Kimi API into SaaS products, coding tools, agents, and existing applications with less setup work.
Access the Latest Kimi Models on an Updated Model Library
Keep your applications connected to a growing library of AI models without rebuilding your stack for every new release. ModelFold continuously expands its model lineup, giving developers a convenient way to access Kimi-K3 and future Kimi models as they become available.
Get Responsive Support for Your Kimi K3 Integration
Get help when you encounter questions about API access, billing, model usage, or integration. ModelFold provides customer support to help developers resolve issues and keep their Kimi K3 API workflows running smoothly.
Frequently Asked Questions
What is Kimi K3 API?⌄
Kimi K3 API gives developers programmatic access to Kimi K3, Moonshot AI’s 2.8T-parameter MoE model. Kimi K3 is designed for long-horizon coding, reasoning, knowledge work, agentic tasks, and multimodal applications.
How can I use Kimi K3 API on ModelFold?⌄
You can access Kimi K3 API through ModelFold, send prompts and context through API requests, and integrate responses into coding tools, AI agents, SaaS products, research applications, and other workflows.
Can I try Kimi K3 free online on ModelFold?⌄
Yes. You can try Kimi K3 free online in ModelFold Playground to explore model capabilities before API integration. New ModelFold users can also use free credits to get started with Kimi K3 API.
What is Kimi K3 context window?⌄
Kimi K3 model supports up to 1 million tokens of context, making it suitable for large codebases, long documents, research materials, and workflows that need to retain substantial context.
Does Kimi K3 API support image inputs?⌄
The Kimi K3 model has native vision capabilities and can reason over screenshots, interfaces, diagrams and other images alongside text. The ModelFold API currently accepts text messages; check the latest API documentation for supported input formats.
How much does Kimi K3 API cost on ModelFold?⌄
ModelFold offers usage-based Kimi K3 API pricing, so you pay based on actual API usage. Pricing may change as model and provider costs are updated. Check ModelFold Pricing for the latest Kimi K3 API rates.
Why use ModelFold for Kimi K3 API?⌄
ModelFold lets developers access Kimi K3 API alongside multiple coding and AI models in one place. It also provides new-user credits, usage-based pricing, API documentation, an expanding model library, and customer support for API users.
| Input | 600 credits 1M tokens≈ $3.00 |
| Output | 3000 credits 1M tokens≈ $15.00 |
Billed per token: input and output are priced separately, and thinking tokens count as output. The Playground charges exactly the same way.
Read API docs →curl https://ai.modelfold.online/v1/chat/completions \
-H "Authorization: Bearer $MODELFOLD_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"kimi-k3","messages":[{"role":"user","content":"Hello"}]}'