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Vicuna
by LMSYS
About the model:
Vicuna is a chat assistant trained by fine-tuning LLaMA on user-shared conversations collected from ShareGPT.
Model type:
Text
Model performance class:
Full
Link to the model:
https://huggingface.co/lmsys/vicuna-13b-v1.5
Base models:
Vicuna-13B
End model:
Vicuna-13B-v1.5
End model license:
Non-commercial license
About the organisation:
According to its website, 'The Large Model Systems Organisation develops large models and systems that are open, accessible and scalable'
Link to the organisation:
https://lmsys.org/
Model release date:
March 2023
Availability
Base Model Data
Vicuna is fine-tuned LLaMA, and LLaMA in turn is based on 'publicly available datasets' that are not all specified or easily downloadable.
https://github.com/facebookresearch/llama/blob/main/MODEL_CARD.md#training-dataset
End User Model Data
From the documentation 'We will not release the ShareGPT dataset'. Also 'Vicuna v1.3 is fine-tuned from LLaMA with supervised instruction fine-tuning. The training data is around 140K conversations collected from ShareGPT.com.'
https://github.com/lm-sys/FastChat#fine-tuning
Base Model Weights
Unlike Vicuna 13B v0, these weights do not require applying delta
https://github.com/lm-sys/FastChat#vicuna-weights
End User Model Weights
Model weights made available on HuggingFace.
https://huggingface.co/lmsys/vicuna-13b-v1.5
Training Code
Actively maintained repository
https://github.com/lm-sys/FastChat
Documentation
Code Documentation
Code is quite well-documented and released as part of the FastChat framework.
https://github.com/lm-sys/FastChat
Hardware Architecture
Preprint
Preprint covers training of the Vicuna model.
https://arxiv.org/pdf/2306.05685.pdf
Paper
Paper published in NeurIPS.
https://proceedings.neurips.cc/paper_files/paper/2023/hash/91f18a1287b398d378ef22505bf41832-Abstract-Datasets_and_Benchmarks.html
Modelcard
Minimal model card, but many details are not provided or have to be pieced together from elsewhere.
https://huggingface.co/lmsys/vicuna-13b-v1.3
Datasheet
No datasheet provided.
Access
Licenses
From the documentation 'Vicuna is based on LLaMA and should be used under LLaMA's model license.'
https://github.com/lm-sys/FastChat#vicuna-weights
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. This version of the index generated
09 April 2026
, website content last updated
11 March 2026
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