Examples
Worked examples
- Is an instance
Llama-3-70B released under the Llama 3 Community Licence with downloadable weights.
- Is an instance
Mistral-7B released under Apache-2.0 with downloadable weights.
Counter-examples
Looks similar, but isn't
- Not an instance
A model accessible only via paid API.
- Not an instance
An open-source AI system meeting the OSI's full data+code+weights definition (a stricter superset).
Editorial commentary
Open-weights models (Llama, Mistral, Qwen, DeepSeek, Mixtral, Gemma families) form a large fraction of the contemporary research ecosystem. They are 'open' in a more limited sense than the Open Source Initiative's emerging Open Source AI Definition, which requires data, code, and weights. Open-weights models enable on-premises deployment, fine-tuning, and research access not available with API-only models.
References
- Open Source Initiative Open Source AI Definition v1.0 (2024); Meta Llama 3 model card.
Also known as
open weights · open-weight model
Machine-readable encodings
Use in your systems
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