Accessing OpenAI GPT-5.6 models on Amazon Bedrock from Australia with global cross-Region inference

Australian teams working with AI models can now utilize the latest OpenAI GPT-5.6 models through Amazon Bedrock, which offers global cross-region inference from the Asia Pacific (Sydney) and Asia Pacific (Melbourne) AWS Regions. This setup allows applications to invoke GPT-5.6 Sol, Terra, and Luna models by calling the Amazon Bedrock Runtime endpoint in either of these regions, with requests routed to supported AWS regions for processing. This approach simplifies deployment by providing access to a larger capacity pool without the need for managing regional routing.

GPT-5.6 Sol is optimized for demanding reasoning, coding, and agentic workloads, while Terra balances performance and cost for everyday production use. Luna is designed for high-volume, latency-sensitive applications, offering fast and affordable inference. All three models accept text and image inputs, generate text, and support context windows of up to 1 million tokens.

To use these models, developers can invoke them via Responses API, Chat Completions API, or Converse API, available from the Asia Pacific (Sydney) and Melbourne regions. The post details how to set up prompt caching to optimize inference costs, configure Codex with OpenID Connect (OIDC) authentication, and monitor usage through Amazon CloudWatch and Coding Agent Insights.

The article provides step-by-step instructions on verifying active inference profiles using AWS CLI and the Amazon Bedrock console, and demonstrates how to invoke GPT-5.6 models through various APIs with sample code snippets. It also explains how to configure prompt caching modes, set up Codex with federated identity providers, and monitor usage metrics.

This development enhances AI deployment flexibility in Australia, enabling organizations to leverage the latest GPT-5.6 models with regional redundancy, cost efficiency, and comprehensive monitoring capabilities.