Get started with OpenAI GPT-5.4 on Amazon Bedrock in AWS GovCloud (US)

This article demonstrates how to build an identity incident review workflow using OpenAI GPT-5.4 on Amazon Bedrock in AWS GovCloud (US), which now supports FedRAMP High and DoD IL4/5 compliance.

• OpenAI GPT-5.4 available in AWS GovCloud (US-West) through the Bedrock Mantle endpoint with OpenAI-compatible API
• Configure AWS CLI credentials, Python environment, and short-term Bedrock API keys for authentication
• Use reasoning effort controls to separate observed facts from inferences in incident analysis
• Generate predictable JSON incident records with strict schema validation for downstream processing
• Implement function calling to connect incident reviews to local security control lookups
• Set store=False to disable response storage and configure data retention modes for compliance
• Apply operational controls including short-lived credentials, output length limits, and human approval workflows

The examples provide production-ready patterns for federal agencies and enterprises to securely deploy generative AI for incident response and compliance workflows in AWS GovCloud.