As OpenAI announced two open-weight reasoning models with capabilities on par with its o-series, Amazon announced that the new models would become available on AWS. This is the first time that OpenAI models will be offered by AWS. They will be available as a model choice with Amazon AI services Bedrock and SageMaker AI. While anyone can download the models via Hugging Face, Amazon is offering these models with OpenAI’s full knowledge and approval, as Dmitry Pimenov, the model maker’s product lead, indicated. A spokesperson described the offering as similar to how Amazon offered open model DeepSeek-R1 earlier this year. Until now, AWS has best been known as a major host and a financial backer of Anthropic’s Claude, one of OpenAI’s biggest competitors. AWS offers Claude, along with other models from makers such as Cohere, DeepSeek, Meta, and Mistral, as well as its own home-grown ones in its AI services. Specifically, Bedrock allows AWS customers to build and host generative AI apps using models of their choice. SageMaker, on the other hand, allows AWS customers to train, or even build, their own AI models largely for analytics uses. As for how such a move with AWS benefits OpenAI: The AI provider’s relationship with Microsoft is notoriously strained, as the two are reportedly renegotiating their long-term partnership deal. In addition, this partnership allows swaths of AWS enterprise customers to easily experiment with using OpenAI models with their hosted AI apps.