OpenAI GPT-5.4 generally available on Amazon Bedrock in AWS GovCloud (US-West)

Amazon Bedrock now supports GPT-5.4 from OpenAI in AWS GovCloud (US-West). Government and regulated industry customers can use GPT-5.4 for complex reasoning, coding, document analysis, and multi-step workflows while benefiting from the security, governance, and operational controls of Amazon Bedrock. GPT-5.4 runs on Amazon Bedrock’s next-generation inference engine, built for high performance, reliability, and security, with isolated queues and durable execution for resilient workloads. Prompts and responses remain in your AWS environment and are not used to train models. For Regional availability of GPT-5.4 see the [AWS Regions page](https://docs.aws.amazon.com/bedrock/latest/userguide/models-region-compatibility.html). Read [the launch blog](https://aws.amazon.com/blogs/machine-learning/openai-models-and-codex-on-amazon-bedrock-are-now-generally-available) to learn more, for documentation and a step-by-step walkthrough, see the [Amazon Bedrock docs](https://docs.aws.amazon.com/bedrock/latest/userguide/model-cards-openai.html) and the[ getting started blog](https://aws.amazon.com/blogs/aws/get-started-with-openai-gpt-5-5-gpt-5-4-models-and-codex-on-amazon-bedrock).