LEMON: Lossless model expansion
On the map: LLM reasoning → Multimodal reasoning
Abstract (arXiv)
Scaling of deep neural networks, especially Transformers, is pivotal for their surging performance and has further led to the emergence of sophisticated reasoning capabilities in foundation models. Such scaling generally requires training large models from scratch with random initialization, failing to leverage the knowledge acquired by their smaller counterparts, which are already resource-intensive to obtain. To tackle this inefficiency, we present LosslEss MOdel ExpansioN (LEMON), a recipe to initialize scaled models using the weights of their smaller but pre-trained counterparts. This is followed by model training with an optimized learning rate scheduler tailored explicitly for the scaled models, substantially reducing the training time compared to training from scratch. Notably, LEMON is versatile, ensuring compatibility with various network structures, including models like Vision Transformers and BERT. Our empirical results demonstrate that LEMON reduces computational costs by 56.7% for Vision Transformers and 33.2% for BERT when compared to training from scratch.
Key facts. Cited by 23 papers in the map (data through 14 Oct 2026). Placed in Multimodal reasoning, one of 17 directions in LLM reasoning. Builds on 66 of its 84 references that are in the map. First posted on arXiv 12 Oct 2023.
Builds on
66 of 84 references.
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- 2025Advantageous Parameter Expansion Training Makes Better Large Language Models30 May 2025
- 2025Efficient Construction of Model Family through Progressive Training Using Model Expansion1 Apr 2025
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- 2024A Little Help Goes a Long Way: Efficient LLM Training by Leveraging Small LMs24 Oct 2024
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