text: **Open source**
  Active organizations in the AI open-source community include Hugging Face,[289] Google,[290] 
  EleutherAI and Meta.[291] Various AI models, such as Llama 2, Mistral or Stable Diffusion, have been 
  made open-weight,[292][293] meaning that their architecture and trained parameters (the "weights") are 
  publicly available. Open-weight models can be freely fine-tuned, which allows companies to specialize 
  them with their own data and for their own use-case.[294] Open-weight models are useful for research and 
  innovation but can also be misused. Since they can be fine-tuned, any built-in security measure, such as 
  objecting to harmful requests, can be trained away until it becomes ineffective. Some researchers warn 
  that future AI models may develop dangerous capabilities (such as the potential to drastically facilitate 
  bioterrorism) and that once released on the Internet, they cannot be deleted everywhere if needed. They 
  recommend pre-release audits and cost-benefit analyses.[295] 