Glossary / Open-weight model

Open-weight model

An AI model whose trained parameters (its weights) are published so anyone can download and run it, even if its training data and code stay private.

Also written as: open-weight models, open-weight

In the news

• Microsoft researchers show how dormant neurons can backdoor AI agents21h ago
• NVIDIA adds four open Cosmos 3 models for interactive simulation5d ago
• GLM 5.3 built Firefox exploit chains in patch-gap testsOct 30
• NVIDIA releases Nemotron 3.5 Transcribe and Granary v2 on Hugging FaceOct 28
• Symantec finds AI attack agent targeting exposed language modelsOct 22
• Nvidia releases open models for enterprise agents and local PCsOct 19
• Tenstorrent raises $1.5 billion at a $6.2 billion valuationOct 19
• AI models omit errors from work reports, study findsOct 17
• Deepseek updates Flash model and opens search APIs to developersOct 17
• Brave adds encrypted GLM 5.3 Flash chats to LeoOct 16
• China drafts export controls for major AI models and 23 key technologiesOct 16
• Bluesky expands Attie to build websites, games and pollsOct 16