Unsloth AI

Unsloth AI is an open-source toolkit for faster training and fine-tuning of large language models.

Faster fine-tuning and RL for LLMs

Unsloth AI focuses on compute optimization to reduce training time and memory usage. It supports modern training setups and model families, including:

• gpt-oss
• Llama 4
• DeepSeek-R1
• Qwen3
• TTS models
• BERT-style models

Key capabilities include:

• Reinforcement learning support (RL, GRPO)
• Long-context training up to hundreds of thousands of tokens
• Support for modern numeric formats such as FP8

Built for developers and teams

Unsloth AI is aimed at engineers who want to quickly adapt a model for a specific task, such as a chatbot, assistant, or internal tool. To help with deployment and collaboration, it provides:

• Docker images
• Documentation and a blog with updates
• An active Discord community

For experiments and production

The project can be used for research experiments as well as production workloads. Open-source code makes it easier to audit, customize, and adapt the training workflow to your company’s infrastructure.