This Week in AWS: Open AI Models Now on AWS Bedrock

Big news: OpenAI has allowed its open weight models to be used on AWS Bedrock. This is a historic announcement especially with OpenAI partnering with Microsoft Azure, the top AWS competitor. However, OpenAI has expanded beyond its initial Azure partnership into AWS.

But first, what is an open weight model?

Good question. According to the Open Source Initiative, an open weight model is a LLM where weights (numerical parameters) are available for download and use.

However… do NOT confuse open weights with open source. With Open weights, the training data, code and architecture are not publicly available like an open source model.

Now that we have a basic understanding of when an open weight model is, we will proceed with the partnership news.

OpenAI allows two models available on AWS Bedrock. Here is the AWS product page. The page also contains open weights documentation. The two current available models are gpt-oss-20b and gpt-oss-120b.

I like this new partnership because as a builder having many models and different types (closed weights and open weights) are crucial towards creating products and services for different industries. I also like the open weights because of the transparency. It is essential to know what are in these LLMs, what data they collect and how they work.