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6 Fine-Tuning LLM Frameworks Ranked by Speed, Memory, and GPU Needs

Last Updated: October 23rd, 2026

Six training frameworks are covered here: Axolotl, DeepSpeed, Megatron-LM, PyTorch Lightning Fabric, Torchtune, and Unsloth. Available benchmarks don't line up across them. Speed comparisons come from reported throughput tests; memory figures reflect documented VRAM ranges for LoRA, QLoRA, and full…