Tools to Fine-Tune LLMs Locally

Reef is self-hosted infrastructure for developers who want AI agents to improve through feedback on actual interactions. It connects inference and learning with versioned deployment, so an agent can update its model weights or its prompts, rules, and skills while continuing to serve requests. It's open source under Apache 2.0.

Gemma is Google DeepMind’s family of open-weight AI models for developers building applications that can run on their own hardware. Its range covers compact models for phones and IoT devices alongside larger Gemma 4 models for reasoning on personal computers and servers. Some applications can work offline, keeping model inference on the device. Google AI Studio and Google Cloud are also available for hosted use.

LLaMA-Factory is an open-source framework for developers and researchers who want to adapt language and multimodal models on their own hardware. It brings training and inference into one toolkit, with support for LLaMA, Qwen3, Qwen3-VL, DeepSeek, Gemma, Mistral and LLaVA. Its license is Apache 2.0.

Unsloth brings model training and everyday AI use into a desktop app for people who want to run models on their own hardware. Its no-code interface covers chat, fine-tuning and media generation on macOS, Windows and Linux. The Unsloth software is open source under Apache 2.0.

DataDreamer connects LLM prompting, synthetic data generation, and model training in one Python library. It's for researchers and developers who want to build datasets and use them to fine-tune or align models in reproducible workflows. The library is open source under the MIT license.

nanoGPT is a Python toolkit for developers and researchers who want to train GPT models on their own hardware or fine-tune existing GPT-2 checkpoints. Its author has deprecated the project and points readers to nanochat. The MIT-licensed code remains available for study and modification.

Ludwig is an open-source Python framework for developers and researchers who want to train custom AI models on their own hardware. A YAML file describes the model and training pipeline, while Ludwig handles preprocessing, training and evaluation. It uses the Apache 2.0 license. Install the Python package with the optional LLM dependencies for fine-tuning; current source requires Python 3.12 or later.

H2O LLM Studio is a self-hosted tool for teams that want to adapt language models to their own datasets without writing training code. Its browser interface brings training experiments, evaluation, and model testing into one place. The project is open source under Apache 2.0.

AutoTrain trains custom machine learning models from your own data through a no-code interface. It's for people who need to fine-tune an LLM or build a classifier without writing a training pipeline. The local AutoTrain Advanced project is no longer maintained, so it won't receive bug fixes or new features.

TensorZero is a self-hosted platform for developers building LLM applications. The project is archived and no longer maintained. It combines a model gateway with tools for inspecting responses, evaluating workflows, and improving prompts using production data and human feedback.

DB-GPT is a self-hosted AI data assistant for teams analyzing business data and developers building data applications. It turns plain-language requests into SQL queries and Python analysis, then produces charts, dashboards, or HTML reports. You can run it on macOS or Linux, with Docker deployment also supported.

Kaito manages self-hosted LLM inference, fine-tuning, and document retrieval services in a Kubernetes cluster. It's for teams that want to run models on infrastructure they control while reducing the work of sizing GPU resources and managing model deployments. The project is open source under Apache 2.0.

Nemotron is NVIDIA's family of AI models for developers building agents that reason, write code and call tools. You can run models locally for private, offline work or deploy them on your own servers. NVIDIA publishes model weights, training data and recipes so teams can inspect and adapt the models for their applications.

LLaVA is a family of vision-language models for researchers and developers who want to ask questions about images on their own hardware. It pairs a CLIP vision encoder with a language model to support image descriptions, visual reasoning and reading text in pictures. Its Python code is open source under Apache 2.0; the project places research-use restrictions on its data and checkpoints, with additional terms from the underlying models.

StarCoder2 is a family of code generation models for developers who want to run code completion on their own hardware or adapt a model to their code. It predicts code continuations rather than following conversational instructions, so it's suited to completion workflows rather than a chat-based coding assistant.

Intel IPEX-LLM is a library for developers running or fine-tuning models on Intel hardware. The project is archived and no longer maintained. Intel reports known security issues and no longer accepts patches or provides updates. The code is open source under Apache 2.0.

HQQ is a Python library that compresses language and vision models without needing a calibration dataset. It's for developers preparing models to run on their own hardware or servers, particularly when GPU memory limits the model they can use. The library is open source under Apache 2.0.

Colossal-AI is a Python framework for developers and researchers training or serving large AI models on their own GPU hardware. It addresses the memory and computing demands of models that are difficult to fit on a single GPU, with tools for distributing work across a cluster. It's open source under Apache 2.0.

XTuner is an open-source LLM training engine for researchers and teams training large mixture-of-experts (MoE) models on their own hardware. It supports GPU and Ascend NPU training, with an emphasis on memory use and distributed training efficiency at scales reaching a trillion parameters.

Oumi builds specialized AI models for teams that want control over their training data, model weights, and deployment. Its Apache 2.0 open-source stack runs on laptops, clusters, and your own servers, while its hosted service automates model development from a plain-English task description. You own the resulting weights, data, and training recipes.

nanochat is an MIT-licensed toolkit for training your own LLM and chatting with it on hardware you control. It's aimed at researchers and developers who want to study or modify the full training pipeline, with a small Python codebase built on PyTorch.

Augmentoolkit turns your documents into training data for a custom LLM that learns a particular subject. It's for researchers, developers and hobbyists who want models trained on their own material, such as research papers or fictional lore. The Python toolkit is open source under the MIT license and runs on macOS and Linux, with WSL recommended for Windows.

ClearML is an MLOps suite for recording experiments, managing datasets and running ML workloads. Its Apache 2.0 Python SDK connects to a ClearML Server, available as a hosted service or open-source software you deploy yourself. ClearML Agent handles job orchestration and reproducibility.

Petals lets developers and researchers use large language models that won't fit on a single consumer GPU by sharing the work across a network of machines. It supports text generation and fine-tuning from a desktop computer or Google Colab. Each participant holds part of the model, while other computers handle the remaining parts.

torchtitan is an open-source training platform for researchers and developers building generative AI models on their own GPU machines or server clusters. It uses PyTorch's distributed training tools and keeps the model code relatively simple when spreading work across GPUs. The Python codebase has extension points and replaceable components for experiments with model architectures and training infrastructure.

text-generation-webui, also called TextGen, runs language models on your own hardware through a desktop app or a self-hosted browser interface. It's for people who want private chat and writing tools, and developers who need a local model API. It works offline without telemetry; web search and page fetching use the internet.

TRL is a Python library for developers and researchers who want to adapt foundation models on their own hardware. It builds on Hugging Face Transformers and covers supervised fine-tuning, reinforcement learning and training from preference feedback. It's open source under Apache 2.0.

ms-swift is a Python framework for developers and researchers who want to train and deploy language or multimodal models on their own hardware. It brings fine-tuning, evaluation and model serving into one project, with support for Qwen3, DeepSeek-R1, Llama4 and Mistral, plus multimodal models such as Qwen3-VL and InternVL3.5. It's open source under Apache 2.0.

AI Toolkit (ostris) is an MIT-licensed training suite for people who want to fine-tune image and video models on their own hardware or a self-hosted server. It targets consumer NVIDIA GPUs and runs on Linux and Windows, including ARM64 Linux systems such as DGX Spark. An experimental installer also supports Apple Silicon Macs. GPU memory needs depend on the model and training task.

verl is a Python library for teams training large language models on their own GPU infrastructure. It's the open-source implementation of HybridFlow, aimed at researchers and engineers who need reinforcement learning after initial model training. It uses the Apache 2.0 license.

LitGPT is a Python toolkit for developers and researchers who want to train, adapt and serve language models on their own hardware or servers. Its model implementations are written directly, with little abstraction between you and the code, so you can inspect model behavior and modify it for research or custom applications. It's open source under Apache 2.0.

OpenRLHF is a self-hosted Python framework for researchers and teams training language models with human feedback or custom rewards. It runs on your own NVIDIA GPU hardware, with Docker support and distributed training across servers. It's open source under Apache 2.0.

torchtune is a Python library for developers and researchers who want to adapt LLMs on their own GPU hardware using PyTorch. Its editable training recipes suit work that needs control over the training code and model implementations. The project is no longer actively maintained.

DSPy is a Python framework for developers building AI applications whose tasks need clear inputs, predictable output types, and measurable results. You define what a language model should produce, then compose those tasks into a larger program. It's open source under the MIT license.

bitsandbytes is an open-source Python library for developers who need to fit large language model inference or fine-tuning into less memory on their own hardware. It works with PyTorch and carries the MIT license. Its focus is the memory cost of model weights and training, rather than a chat interface.

KTransformers is an open-source framework for running and fine-tuning large language models on your own hardware. It focuses on mixture-of-experts (MoE) models, distributing work between CPU memory and GPU resources to reduce the GPU memory needed. It's aimed at researchers and developers who want to serve or adapt models such as DeepSeek-V3 and DeepSeek-R1.