# kvcache-ai/ktransformers

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17,288 stars · 1,313 forks · Python · Apache-2.0

## Links

- GitHub: https://github.com/kvcache-ai/ktransformers
- Homepage: https://kvcache-ai.github.io/ktransformers/
- awesome-repositories: https://awesome-repositories.com/repository/kvcache-ai-ktransformers.md

## Description

Ktransformers is a comprehensive framework designed for the operation, fine-tuning, and serving of large language models. It functions as a heterogeneous inference engine and quantized execution runtime, enabling the deployment of massive models by distributing computational workloads across both CPU and GPU resources. This architecture allows users to bypass local memory constraints, making it possible to run and train models that exceed the capacity of a single device.

The project distinguishes itself through specialized support for sparse architectures, particularly mixture-of-experts models. It employs pipelined expert offloading and layer-wise sharding to balance memory usage and processing speed across heterogeneous hardware. By utilizing hardware-specific kernel optimizations, such as specialized instruction sets for server processors, the framework maximizes throughput for both inference and fine-tuning tasks.

Beyond its core execution capabilities, the project provides a production-ready serving environment that exposes models via an OpenAI-compatible HTTP interface. It includes a suite of command-line tools for managing model deployments, configuring system environments, and performing performance benchmarking. The framework also supports the integration of custom inference kernels and operator injection, allowing for architectural modifications and fine-tuned control over model placement strategies.

## Tags

### Artificial Intelligence & ML

- [Transformer Inference Engines](https://awesome-repositories.com/f/artificial-intelligence-ml/transformer-inference-engines.md) — Functions as a high-performance engine for running large language models across heterogeneous CPU and GPU resources.
- [OpenAI-Compatible APIs](https://awesome-repositories.com/f/artificial-intelligence-ml/agentic-systems-frameworks/model-integration-serving/model-integration-interfaces/ai-integration-apis/openai-compatible-apis.md) — Exposes models via a standard HTTP interface compatible with the OpenAI API specification. ([source](https://kvcache-ai.github.io/ktransformers/en/kt-kernel/AVX2-Tutorial.html))
- [Large Language Model Fine-Tuning Frameworks](https://awesome-repositories.com/f/artificial-intelligence-ml/machine-learning/infrastructure/integrated-development-platforms/machine-learning-platforms/large-language-model-fine-tuning-frameworks.md) — Provides a comprehensive framework for training and adapting massive language models using memory-efficient techniques.
- [Local Inference Engines](https://awesome-repositories.com/f/artificial-intelligence-ml/machine-learning/infrastructure/model-optimization-and-inference/serving-and-runtime/large-language-model-optimization/local-inference-engines.md) — Executes large language models by distributing workloads across CPU and GPU resources to overcome memory constraints.
- [Heterogeneous Orchestrators](https://awesome-repositories.com/f/artificial-intelligence-ml/local-model-orchestrators/heterogeneous-orchestrators.md) — Orchestrates model computation across system memory and graphics hardware to bypass local VRAM capacity limits.
- [Model Inference Servers](https://awesome-repositories.com/f/artificial-intelligence-ml/machine-learning/infrastructure/model-inference-serving/engines-runtimes-servers/model-inference-servers.md) — Provides a production-ready serving engine optimized for hosting sparse mixture-of-experts models.
- [Model Inference Optimizations](https://awesome-repositories.com/f/artificial-intelligence-ml/machine-learning/infrastructure/model-optimization-and-inference/serving-and-runtime/large-language-model-optimization/model-inference-optimizations.md) — Executes large language models by automatically distributing workloads across CPU and GPU resources. ([source](https://kvcache-ai.github.io/ktransformers/print.html))
- [Model Serving Engines](https://awesome-repositories.com/f/artificial-intelligence-ml/model-serving-engines.md) — Provides production-ready serving of fine-tuned models via standard HTTP chat APIs.
- [Kernel Optimizations](https://awesome-repositories.com/f/artificial-intelligence-ml/kernel-optimizations.md) — Implements hardware-specific computational kernels leveraging specialized instruction sets like AVX and AMX.
- [Language Model Fine-Tuning](https://awesome-repositories.com/f/artificial-intelligence-ml/language-model-fine-tuning.md) — Provides utilities for training massive language models on limited hardware using memory-efficient offloading. ([source](https://kvcache-ai.github.io/ktransformers/))
- [Deployment Pipelines and Endpoints](https://awesome-repositories.com/f/artificial-intelligence-ml/machine-learning/infrastructure/model-deployment-and-serving/deployment-pipelines-and-endpoints.md) — Provides standardized deployment pipelines and HTTP endpoints for serving fine-tuned language models. ([source](https://kvcache-ai.github.io/ktransformers/en/SFT/KTransformers-Fine-Tuning_User-Guide.html))
- [Serving Frameworks](https://awesome-repositories.com/f/artificial-intelligence-ml/machine-learning/infrastructure/model-optimization-and-inference/serving-and-runtime/large-language-model-optimization/serving-frameworks.md) — Integrates high-performance execution kernels into production-ready serving frameworks for hybrid CPU-GPU workloads. ([source](https://kvcache-ai.github.io/ktransformers/print.html))
- [Language Model Fine-Tuning](https://awesome-repositories.com/f/artificial-intelligence-ml/machine-learning/infrastructure/model-training-and-tuning/fine-tuning-and-customization/language-model-fine-tuning.md) — Deploys fine-tuned models by managing the integration of expert and non-expert adapter layers across heterogeneous hardware. ([source](https://kvcache-ai.github.io/ktransformers/zh/Qwen3.5-SGLang-LoRA-Serving_zh.html))
- [Mixture-of-Experts Inference Optimizers](https://awesome-repositories.com/f/artificial-intelligence-ml/mixture-of-experts-inference-optimizers.md) — Optimizes mixture-of-experts model inference through pipelined expert offloading between CPU and GPU.
- [Model Quantization](https://awesome-repositories.com/f/artificial-intelligence-ml/model-quantization.md) — Executes models using compressed weight precision formats to reduce memory footprint and accelerate throughput.
- [Precision Quantization](https://awesome-repositories.com/f/artificial-intelligence-ml/precision-quantization.md) — Supports multiple precision formats to compress model weights and optimize memory usage during inference. ([source](https://kvcache-ai.github.io/ktransformers/en/kt-kernel/AVX2-Tutorial.html))
- [Quantized Inference Runtimes](https://awesome-repositories.com/f/artificial-intelligence-ml/quantized-inference-runtimes.md) — Provides a runtime environment designed to execute quantized models with hardware-specific acceleration.
- [Sparse Computing Kernels](https://awesome-repositories.com/f/artificial-intelligence-ml/sparse-computing-kernels.md) — Provides specialized computational kernels to accelerate sparse neural network operations and attention mechanisms.
- [Adapter Fine-Tuning](https://awesome-repositories.com/f/artificial-intelligence-ml/adapter-fine-tuning.md) — Integrates low-rank adaptation parameters to enable efficient model fine-tuning without full weight updates. ([source](https://kvcache-ai.github.io/ktransformers/en/SFT/KTransformers-Fine-Tuning_Developer-Technical-Notes.html))
- [Inference Optimization Kernels](https://awesome-repositories.com/f/artificial-intelligence-ml/inference-optimization-kernels.md) — Implements specialized computational kernels to accelerate token generation and decoding phases of large language models. ([source](https://kvcache-ai.github.io/ktransformers/en/SFT/injection_tutorial.html))
- [Performance Benchmarks](https://awesome-repositories.com/f/artificial-intelligence-ml/machine-learning/infrastructure/model-evaluation-and-validation/performance-benchmarks.md) — Includes tools for measuring inference speed and resource utilization across diverse hardware configurations. ([source](https://kvcache-ai.github.io/ktransformers/en/kt-kernel/kt-cli.html))
- [Fully Sharded Data Parallelism](https://awesome-repositories.com/f/artificial-intelligence-ml/machine-learning/infrastructure/model-training-and-tuning/distributed-and-scaling-strategies/distributed-learning/fully-sharded-data-parallelism.md) — Splits large model structures across multiple hardware devices to balance memory usage and parallelize inference.
- [Mixture of Experts](https://awesome-repositories.com/f/artificial-intelligence-ml/machine-learning/infrastructure/model-training-and-tuning/fine-tuning-and-customization/model-customization/mixture-of-experts.md) — Provides support for training ultra-large mixture-of-experts models by sharding layers across system and graphics memory. ([source](https://kvcache-ai.github.io/ktransformers/print.html))
- [Model Adapters](https://awesome-repositories.com/f/artificial-intelligence-ml/model-adapters.md) — Supports loading and serving modular weight adapters alongside base models for optimized inference. ([source](https://kvcache-ai.github.io/ktransformers/en/SFT/KTransformers-Fine-Tuning_User-Guide.html))
- [Attention Backends](https://awesome-repositories.com/f/artificial-intelligence-ml/model-optimization/inference-deployment/attention-backends.md) — Provides optimized computational backends specifically designed to accelerate attention mechanisms in transformer models. ([source](https://kvcache-ai.github.io/ktransformers/en/SFT/KTransformers-Fine-Tuning_Developer-Technical-Notes.html))
- [Distributed Deployment Utilities](https://awesome-repositories.com/f/artificial-intelligence-ml/model-optimization/inference-deployment/model-deployment-toolkits/distributed-deployment-utilities.md) — Shards model components across multiple devices to minimize peak memory usage during training and inference. ([source](https://kvcache-ai.github.io/ktransformers/en/SFT/KTransformers-Fine-Tuning_Developer-Technical-Notes.html))
- [Model Serving](https://awesome-repositories.com/f/artificial-intelligence-ml/model-serving.md) — Provides a unified command-line interface for launching inference servers and managing model deployments. ([source](https://kvcache-ai.github.io/ktransformers/print.html))
- [CPU Optimizations](https://awesome-repositories.com/f/artificial-intelligence-ml/cpu-optimizations.md) — Implements CPU-specific performance tuning and hardware-specific backend optimizations for model execution. ([source](https://kvcache-ai.github.io/ktransformers/en/kt-kernel/kt-kernel_intro.html))
- [Chat Model Interfaces](https://awesome-repositories.com/f/artificial-intelligence-ml/language-model-orchestration/language-model-interaction-patterns/chat-model-interfaces.md) — Offers an interactive command-line interface for direct chat-based testing and validation of loaded models. ([source](https://kvcache-ai.github.io/ktransformers/en/kt-kernel/kt-cli.html))
- [Preference-Based Model Alignments](https://awesome-repositories.com/f/artificial-intelligence-ml/machine-learning/infrastructure/machine-learning-training/fine-tuning-and-alignment/preference-based-model-alignments.md) — Provides techniques for refining model behavior using human feedback to ensure alignment with user expectations. ([source](https://kvcache-ai.github.io/ktransformers/en/SFT/DPO_tutorial.html))
- [Model Conversion Pipelines](https://awesome-repositories.com/f/artificial-intelligence-ml/model-conversion-pipelines.md) — Merges expert and non-expert model weights into unified formats compatible with high-performance serving engines. ([source](https://kvcache-ai.github.io/ktransformers/en/SFT/Qwen3.5-SGLang-LoRA-Serving.html))
- [Performance Optimizations](https://awesome-repositories.com/f/artificial-intelligence-ml/machine-learning/infrastructure/model-optimization-and-inference/performance-optimizations.md) — Provides low-level configurations to maximize execution speed and resource efficiency across CPU and GPU hardware. ([source](https://kvcache-ai.github.io/ktransformers/en/kt-kernel/AVX2-Tutorial.html))

### Networking & Communication

- [Model Parallelism Strategies](https://awesome-repositories.com/f/networking-communication/distributed-systems-p2p/distributed-computing/model-parallelism-techniques/model-parallelism-strategies.md) — Implements strategies for splitting large neural network layers across multiple hardware accelerators to manage memory requirements. ([source](https://kvcache-ai.github.io/ktransformers/print.html))

### Development Tools & Productivity

- [Custom Operator Interfaces](https://awesome-repositories.com/f/development-tools-productivity/developer-utilities-libraries/extensibility-frameworks/custom-operator-interfaces.md) — Provides mechanisms for registering and integrating user-defined mathematical operations into the core computation pipeline. ([source](https://kvcache-ai.github.io/ktransformers/en/SFT/index.html))

### DevOps & Infrastructure

- [Command Line Configuration Interfaces](https://awesome-repositories.com/f/devops-infrastructure/configuration-management/application-settings-management/command-line-configuration-interfaces.md) — Enables configuration of storage paths, environment settings, and model parameters via command-line interfaces. ([source](https://kvcache-ai.github.io/ktransformers/en/kt-kernel/kt-kernel_intro.html))

### System Administration & Monitoring

- [System Diagnostic Tools](https://awesome-repositories.com/f/system-administration-monitoring/diagnostic-tools/diagnostics/infrastructure-diagnostic-tools/system-diagnostic-tools.md) — Performs automated system checks to identify configuration issues and missing dependencies in the local environment. ([source](https://kvcache-ai.github.io/ktransformers/en/kt-kernel/kt-cli.html))