XTuring

xTuring is an open source Python library for personalizing large language models. It is built for developers and researchers who want to fine tune a model on their own data and run it under their own control, with a deliberately simple interface so that the same workflow suits beginners and experienced engineers. The documentation guides it around three principles: simplicity and productivity, efficient use of compute and memory, and agility in customizing models. The example notebooks are organized by task instead of by model family and cover fine tuning with LoRA, fine tuning with LoRA plus INT8 precision, and evaluating perplexity. A separate reference lists supported models and their naming variants. The project comes from Stochastic, which also runs a Discord community and a Twitter account for support. The library is released under the Apache 2.0 licence and the documentation site is the main entry point, with a quickstart guide for getting set up. There is no charge for the software, which is free under its open source licence. The site lists no paid plans, hosted tiers or prices.