Configure the ChatGPT desktop app with Amazon Bedrock in AWS GovCloud (US)

This AWS post walks through a controlled local deployment of the ChatGPT desktop app and Codex that routes model inference through Amazon Bedrock Mantle in us-gov-west-1, using API-mode sign-in, a named AWS profile, an administrator-controlled requirements.toml, and network restrictions that allow only the approved Bedrock endpoint. It covers prerequisites, authentication via an Amazon Bedrock API key or the AWS SDK credential chain (including SSO), the config.toml and requirements.toml settings, launch and verification steps, troubleshooting, and rollback. The post notes that using AWS GovCloud (US) and following the guide do not by themselves authorize a workload, and that organizations remain responsible for reviewing the deployment against their security and authorization processes.