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If you’re trying to enable Bedrock models in AWS GovCloud and keep running into an error, that’s a normal part of the process. The way this is handled has changed recently, and the old Model Access page no longer works in standard AWS regions.
To get Claude Sonnet 4.5 working in your GovCloud account, you need to approve the End User License Agreement (EULA) through your linked standard AWS account. Here are two simple ways to do this:
First, the recommended way is to use the Chat or Playground feature. Log in to your standard AWS account in either the us-east-1 or us-west-2 region. Open Amazon Bedrock and go to the Chat or Text playground. Choose Claude Sonnet 4.5 as your model. Type any prompt and hit Run. This action will establish the EULA and give you the regional access needed for GovCloud.
Alternatively, you can use the AWS Command Line Interface (CLI). Sign into your standard AWS account and run the command to list all available foundation models. Find the model ID for Claude Sonnet 4.5. Then, run another command to see the available agreement offers for that model and copy the offer token. Finally, run the command to create the model agreement, providing the model ID and the offer token.
Once you’ve completed one of these methods, give it a few minutes for the permissions to update from your standard AWS account to GovCloud. After that, you should be able to access Claude Sonnet 4.5 in your GovCloud account through US-GOV Cross-Region Inference.
This process helps ensure you’re compliant and allows you to use the model securely in your GovCloud environment.
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