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LitGPT is an open-source project from Lightning-AI that provides recipes and tooling to pretrain, finetune, and deploy large language models at scale. It ships with 20+ high-performance LLMs and end-to-end workflows to accelerate model development, training, and deployment within the Lightning AI ecosystem. The code is hosted at Lightning-AI/litgpt on GitHub under the Apache-2.0 license.
AI named LitGPT in February 2026.