Comparison
Open weightsvsClosed models
Open weights
Open-weight models (Llama, Qwen, Mistral, DeepSeek and others) publish their weights so you can download and run them yourself.
Closed models
Closed models (GPT, Claude, Gemini) are reachable only through an API.
The difference
Open-weight models (Llama, Qwen, Mistral, DeepSeek and others) publish their weights so you can download and run them yourself. Closed models (GPT, Claude, Gemini) are reachable only through an API. 'Open weights' is not the same as open source: the training data and code are usually not released.
Entry: Open weights vs closed models →