Updated 2026-10-17
Correction — October 17, 2026: An earlier version of this article described “Amazon GPT55X” as an Amazon language model and presented unsupported claims about its training, capabilities and applications. We have removed those claims. We could not verify an official Amazon announcement or documentation for a product with that name in the sources reviewed.
We cannot substantiate the product name “Amazon GPT55X” or the expansion “Generative Pre-trained Transformer 55X.” This page should not be used as evidence that such a model exists. Repeated claims on third-party websites are not a substitute for an official product page, model documentation or a release announcement.
Amazon Nova is an official Amazon family of AI models. Amazon Bedrock is an AWS service for building generative AI applications and agents using models from Amazon and other providers. These are distinct products; neither source establishes “GPT55X” as an Amazon model.
Reviewed on October 17, 2026: Amazon Nova and Amazon Bedrock. The original article was published on October 31, 2023. This revision replaces its unsupported product description with a correction. If Amazon publishes documentation using the exact GPT55X name, this page can be reassessed against that evidence.