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

… 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. …

Jun 3, 2026 · Amazon Web Services

aws.amazon.com › about-aws › whats-new › …

GPT-5.5, GPT-5.4, and Codex from OpenAI are now generally available on Amazon Bedrock - AWS

… It runs on the Bedrock next-generation inference engine, built for high performance, reliability, and security. …

Jun 1, 2026 · Amazon Web Services