GPT-5.4 and NVIDIA Nemotron 120B added to Kiro in AWS GovCloud

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Amazon Web Services has added two new AI models to its Kiro IDE and CLI coding assistant within the AWS GovCloud (US-West) Region, which is a restricted cloud environment for U.S. government workloads. OpenAI GPT-5.4 is available for complex reasoning, coding, and multi-step agentic workflows (tasks where an AI model autonomously plans and executes a sequence of actions), running on Amazon Bedrock's inference engine with a 272K token context window and isolated, durable execution queues. NVIDIA Nemotron 3 Super 120B — a hybrid mixture-of-experts model (an architecture that activates only a subset of its parameters at inference time for efficiency) — activates just 12B of its 120B parameters, offering fast and cost-efficient inference on agentic tasks with a 256K context window and a low 0.25x credit multiplier.