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Answer: These three Chinese‑built large language models all leverage Mixture‑of‑Experts architectures, but they target different strengths. Kimi K2 focuses on coding excellence and agentic reasoning with a 1‑trillion parameter architecture (32 B active) and a 130 K token context window, offering 64–65 % scores on SWE‑bench while balancing cost. Qwen 3 Coder is the most polyglot; it scales to 480 B parameters (35 B active), uses dual thinking modes and extends its context window to 256 K–1 M tokens for repository‑scale tasks. GLM 4.5 prioritises tool‑calling and efficiency, achieving 90.6 % tool‑calling success with only 355 B parameters and requiring just eight H20 chips for self‑hosting. The models’ pricing differs: Kimi K2 charges about $0.15 per million input tokens, Qwen 3 about $0.35–0.60, and GLM 4.5 around $0.11. Choosing the right model depends on your workload: coding accuracy and agentic autonomy, extended context for refactoring, or tool integration and low hardware footprint.
|
Model |
Key Specs (summary) |
Ideal Use Cases |
|
Kimi K2 |
1 T total parameters / 32 B active; 130 K context; SWE‑bench 65 %; $0.15 input / $2.50 output per million tokens; modified MIT license |
Coding assistants, agentic tasks requiring multi‑step tool use; internal codebase fine‑tuning; autonomy with transparent reasoning |
|
Qwen 3 Coder |
480 B total / 35 B active parameters; 256 K–1 M context; SWE‑bench 67 %; pricing ~$0.35 input / $1.50 output (varies); Apache 2.0 license |
Large‑codebase refactoring, multilingual or niche languages, research requiring long memory, cost‑sensitive tasks |
|
GLM 4.5 |
355 B total / 32 B active; 128 K context; SWE‑bench 64 %; 90.6 % tool‑calling success; cost $0.11 input / $0.28 output; MIT license |
Agentic workflows, debugging, tool integration, and hardware‑constrained deployments; cross‑domain agents |
This in‑depth comparison draws on independent research, academic papers, and industry analyses to give you an actionable perspective on these frontier models. Each section includes an Expert Insights bullet list featuring quotes and statistics from researchers and industry thought leaders, alongside our own commentary. Throughout the article, we also highlight how Clarifai’s platform can help deploy and fine‑tune these models for production use.
Chinese AI companies are no longer chasing the West; they’re redefining the state of the art. In 2025, Chinese open‑source models such as Kimi K2, Qwen 3, and GLM 4.5 achieved SWE‑bench scores within a few points of the best Western models while costing 10–100× less. This disruptive price‑performance ratio is not a fluke – it’s rooted in strategic choices: optimized coding performance, agentic tool integration, and a focus on open licensing.
The SWE‑bench benchmark, released by researchers at Princeton, tests whether language models can resolve real GitHub issues across multiple files. Early versions of GPT‑4 barely solved 2 % of tasks; yet by 2025 these Chinese models were solving 64–67 %. Importantly, their context windows and tool‑calling abilities enable them to handle entire codebases rather than toy problems.
Imagine a startup building an AI coding assistant. It needs to process 1 B tokens per month. Using a Western model might cost $2,500–$15,000 monthly. By adopting GLM 4.5 or Kimi K2, the same workload could cost $110–$150, allowing the company to reinvest savings into product development and hardware. This economic leverage is why developers worldwide are paying attention.
Kimi K2 is Moonshot AI’s flagship model. It employs a Mixture‑of‑Experts (MoE) architecture with 1 trillion total parameters, but only 32 B activate per token. This sparse design means you get the power of a huge model without massive compute requirements. The context window tops out at 130 K tokens, enabling it to ingest entire microservice codebases. SWE‑bench Verified scores place it at around 65 %, competitive with Western proprietary models. The model is priced at $0.15 per million input tokens and $2.50 per million output tokens, making it suitable for high‑volume deployments.
Kimi K2 shines in agentic coding. Its architecture supports multi‑step tool integration, so it can not only generate code but also execute functions, call APIs, and run tests autonomously. A mixture of eight active experts handle each token, allowing domain‑specific expertise to emerge. The modified MIT license permits commercial use with minor attribution requirements.
Creative example: You’re tasked with debugging a complex Python application. Kimi K2 can load the entire repository, identify the problematic functions, and write a fix that passes tests. It can even call an external linter via Clarifai’s tool orchestration, apply the recommended changes, and verify them – all within a single interaction.
Qwen 3 Coder—often referred to as Qwen 3.25—balances power and flexibility. With 480 B total parameters and 35 B active, it offers robust performance on coding benchmarks and reasoning tasks. Its hallmark is the 256 K token native context window, which can be expanded to 1 M tokens using context extension techniques. This makes Qwen particularly suited to repository‑scale refactoring and cross‑file understanding.
A unique feature is the dual thinking modes: Rapid mode for instantaneous completions and Deep thinking mode for complex reasoning. Dual modes let developers choose between speed and depth. Pricing varies by provider but tends to be in the $0.35–0.60 range per million input tokens, with output costs around $1.50–2.20. Qwen is released under Apache 2.0, allowing wide commercial use.
Creative example: An e‑commerce company needs to refactor a 200 k‑line JavaScript monolith to modern React. Qwen 3 Coder can load the entire repository thanks to its long context, refactor components across files, and maintain coherence. Its Rapid mode will quickly fix syntax errors, while Deep mode can redesign architecture.
GLM 4.5, created by Z.AI, emphasises efficiency and agentic performance. Its 355 B total parameters with 32 B active deliver performance comparable to larger models while requiring eight Nvidia H20 chips. A lighter Air variant uses 106 B total / 12 B active and runs on 32–64 GB VRAM, making self‑hosting more accessible. The context window sits at 128 K tokens, which covers 99 % of real use cases.
GLM 4.5’s standout feature is its agent‑native design: it incorporates planning and tool execution into its core. Evaluations show a 90.6 % tool‑calling success rate, the highest among open models. It supports a Thinking Mode and a Non‑Thinking Mode; developers can toggle deep reasoning on or off. The model is priced around $0.11 per million input tokens and $0.28 per million output tokens. Its MIT license allows commercial deployment without restrictions.
Creative example: A fintech startup uses GLM 4.5 to build an AI agent that automatically responds to customer tickets. The agent uses GLM’s tool calls to fetch account data, run fraud checks, and generate responses. Because GLM runs fast on modest hardware, the company deploys it on a local Clarifai runner, ensuring compliance with financial regulations.
All three models employ Mixture‑of‑Experts (MoE), where only a subset of experts activates per token. This design reduces computation while enabling specialised experts for tasks like syntax, semantics, or reasoning. Kimi K2 selects 8 of its 384 experts per token, while Qwen 3 uses 35 B active parameters for each inference. GLM 4.5 also uses 32 B active experts but builds agentic planning into the architecture.
Longer context windows also increase costs and latency. Feeding 1 M tokens into Qwen 3 could cost $1.20 just for input processing. For most applications, 128 K suffices.
If you’re analysing a legal contract with 500 pages, Qwen 3’s 1 M token window can ingest the entire document and produce summaries without chunking. For everyday tasks like debugging or design, 128 K is sufficient, and using GLM 4.5 or Kimi K2 will reduce costs.
Benchmarks like SWE‑bench, LiveCodeBench, BrowseComp, and GPQA reveal differences in strength. Here’s a snapshot:
Tool‑calling success: GLM 4.5 tops the charts with 90.6 %, while Qwen’s function calls remain strong; K2’s success is comparable but not publicly quantified.
Picture a developer using each model to fix 15 real GitHub issues. According to an independent analysis, Kimi K2 completed 14/15 tasks successfully, while Qwen 3 managed 7/15. GLM wasn’t evaluated in that specific set, but separate tests show its tool‑calling excels at debugging.
Deploying locally means VRAM and GPU requirements: Kimi K2 and Qwen 3 models need multiple high‑end GPUs (often 8× H100 NVL, ~1050 GB VRAM for Qwen, ~945 GB for GLM). GLM’s Air variant runs on 32–64 GB VRAM. Running in the cloud transfers costs to API usage and storage.
A mid‑sized SaaS company wants to integrate an AI code assistant processing 500 M tokens a month. Using GLM 4.5 at $0.11 input / $0.28 output, the cost is around $195 per month. Using Kimi K2 costs approximately $825 ($75 input + $750 output). Qwen 3 falls between, depending on provider pricing. For the same capacity, the cost difference could pay for additional developers or GPUs.
Tool‑calling allows language models to execute functions, query databases, call APIs, or use calculators. In an agentic system, the model decides which tool to use and when, enabling complex workflows like research, debugging, data analysis, and dynamic content creation. Clarifai offers a tool orchestration framework that seamlessly integrates these function calls into your applications, abstracting API details and managing rate limits.
Suppose you’re building a research assistant that needs to gather news articles, summarise them, and create a report. GLM 4.5 can call a web search API, extract content, run summarisation tools, and compile results. Clarifai’s workflow engine can manage the sequence, allowing the model to call Clarifai’s NLP and Vision APIs for classification, sentiment analysis, or image tagging.
GLM 4.5’s architecture emphasises hardware efficiency. It runs on eight H20 chips, and the Air variant runs on a single GPU, making it accessible for on‑prem deployment. K2 and Qwen require more VRAM and multiple GPUs. Quantisation techniques like INT4 and heavy modes allow trade‑offs between speed and accuracy.
In a real‑time chat assistant for customer support, GLM 4.5 or Qwen 3 Rapid mode will deliver quick responses with minimal delay. For batch code generation tasks, Kimi K2 with heavy mode may deliver higher quality at the cost of latency. Clarifai’s compute orchestration can schedule heavy tasks on larger GPU clusters and run quick tasks on edge devices.
GLM 4.5‑V accepts images, enabling vision‑language tasks like document OCR or design layouts. Qwen has a VL Plus variant (vision + language). These multimodal models remain in early access but will be pivotal for building agents that understand websites, diagrams, and videos. Clarifai’s Vision API can complement these models by providing high‑precision classification, detection, and segmentation on images and videos.
A multinational company has code comments in Mandarin, Spanish, and French. Qwen 3 can translate comments while refactoring code, ensuring global teams understand each function. When combined with Clarifai’s language detection models, the workflow becomes seamless.
Independent evaluations reveal clear strengths:
A comparative test generating UI components (modern login page and animated weather cards) showed all models could build functional pages, but GLM 4.5 delivered the most refined design. Its Air variant achieved smooth animations and polished UI details, demonstrating strong front‑end capabilities.
K2 Thinking orchestrated 200–300 tool calls to conduct daily news research and synthesis. This makes it suitable for agentic workflows such as data analysis, finance reporting, or complex system administration. GLM 4.5 also performed well, leveraging its high tool‑calling success in tasks like heap dump analysis and automated ticket responses.
You can build a code reviewer that scans pull requests, highlights issues, and suggests fixes. The reviewer uses GLM 4.5 for quick analysis and tool invocation (e.g., running linters), and Kimi K2 to propose high‑quality, context‑aware code changes. Clarifai’s annotation and workflow tools manage the pipeline: capturing code snapshots, triggering model calls, logging results, and updating the development dashboard.
Open models allow on‑prem deployment, ensuring data never leaves your infrastructure, critical for GDPR and HIPAA compliance. API‑only models require trusting the provider with your data. Clarifai offers on‑prem and private‑cloud options with encryption and access controls, enabling organisations to deploy these models securely.
A healthcare company wants to build a coding assistant that processes patient data. They use Kimi K2 locally for code generation, and Clarifai’s secure workflow engine to orchestrate external API calls (e.g., patient record retrieval), ensuring sensitive data never leaves the organisation. For non‑sensitive tasks like UI design, they call GLM 4.5 via Clarifai’s platform.
The next frontier is agentic AI: systems that plan, act, and adapt autonomously. K2 Thinking and GLM 4.5 are early examples. K2’s reasoning_content field lets you see how the model solves problems. GLM’s hybrid modes demonstrate how models can switch between planning and execution. Expect future models to combine planner modules, retrieval engines, and execution layers seamlessly.
MoE architectures will continue to scale, potentially reaching multi‑trillion parameters while controlling inference cost. Advanced routing strategies and dynamic expert selection will allow models to specialise further. Research by Shazeer and colleagues laid the groundwork; Chinese labs are now pushing MoE into production.
Quantisation reduces model size and increases speed. INT4 quantisation doubles K2’s throughput. Heavy modes (e.g., K2’s eight parallel reasoning paths) improve accuracy but raise compute demands. Striking a balance between speed, accuracy, and environmental impact will be a key research area.
The context arms race continues: Qwen 3 already supports 1 M tokens, and future models may go further. However, longer contexts increase cost and complexity. Efficient retrieval, summarisation, and vector search (like Clarifai’s Context Engine) will be essential.
More models are being released under MIT or Apache licenses, empowering enterprises to deploy locally and fine‑tune. Expect new versions: Qwen 3.25, GLM 4.6, and K2 Thinking improvements are already on the horizon. These open releases will further erode the advantage of proprietary models.
Hardware restrictions (e.g., H20 chips vs. export‑controlled A100) shape model design. Data localisation laws drive adoption of on‑prem solutions. Enterprises will need to partner with platforms like Clarifai to navigate these challenges.
Your selection depends on use case, budget, and infrastructure. Below is a guideline:
|
Use Case / Requirement |
Recommended Model |
Rationale |
|
Green‑field code generation & agentic tasks |
Kimi K2 |
Highest success rate in practical coding tasks; strong tool integration; transparent reasoning (K2 Thinking) |
|
Large codebase refactoring & long‑document analysis |
Qwen 3 Coder |
Longest context (256 K–1 M tokens); dual modes allow speed vs depth; broad language support |
|
Debugging & tool‑heavy workflows |
GLM 4.5 |
Highest tool‑calling success; fastest inference; runs on modest hardware |
|
Cost‑sensitive, high‑volume deployments |
GLM 4.5 (Air) |
Lowest cost per token; consumer hardware friendly |
|
Multilingual & legacy code support |
Qwen 3 Coder |
Supports 358 programming languages; robust cross‑lingual translation |
|
Enterprise compliance & on‑prem deployment |
Kimi K2 or GLM 4.5 |
Permissive licensing (MIT / modified MIT); full control over data and infrastructure |
Clarifai’s AI Platform helps you deploy and orchestrate these models without worrying about hardware or complex APIs. Use Clarifai’s compute orchestration to schedule heavy K2 jobs on GPU clusters, run GLM 4.5 Air on edge devices, and integrate Qwen 3 into multi‑modal workflows. Clarifai’s context engine improves long‑context performance through efficient retrieval, and our model hub lets you switch models with a few clicks. Whether you’re building an internal coding assistant, an autonomous agent, or a multilingual support bot, Clarifai provides the infrastructure and tooling to make these frontier models production‑ready.
Kimi K2 often delivers the highest accuracy on real coding tasks, completing 14 of 15 tasks in an independent test. However, Qwen 3 excels at large codebases due to its long context.
Qwen 3 Coder leads with a native 256 K token window, expandable to 1 M tokens. Kimi K2 and GLM 4.5 offer ~128 K.
Yes. Kimi K2 is released under a modified MIT license requiring attribution for very large deployments. GLM 4.5 uses an MIT license. Qwen 3 is released under Apache 2.0.
Kimi K2 and GLM 4.5 provide weights for self‑hosting. Qwen 3 offers open weights for smaller variants; the Max version remains API‑only. Local deployments require multiple GPUs—GLM 4.5’s Air variant runs on consumer hardware.
Use Clarifai’s compute orchestration to run heavy models on GPU clusters or local runners for on‑prem. Our API gateway supports multiple models through a unified interface. You can chain Clarifai’s Vision and NLP models with LLM calls to build agents that understand text, images, and videos. Contact Clarifai’s support for guidance on fine‑tuning and deployment.
Open models allow on‑prem deployment, so data stays within your infrastructure, aiding compliance. Always implement rigorous security, logging, and anonymisation. Clarifai provides tools for data governance and access control.
Developer advocate specialized in Machine learning. Summanth work at Clarifai, where he helps developers to get the most out of their ML efforts. He usually writes about Compute orchestration, Computer vision and new trends on AI and technology.
Developer advocate specialized in Machine learning. Summanth work at Clarifai, where he helps developers to get the most out of their ML efforts. He usually writes about Compute orchestration, Computer vision and new trends on AI and technology.
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