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xAI's Grok 4.3 model now available on Amazon Bedrock in AWS GovCloud (US-West)

Amazon Bedrock adds xAI's Grok 4.3 model to AWS GovCloud (US-West), offering enhanced reasoning and agent-building capabilities ideal for enterprise workloads.

xAI's Grok 4.3 model is now available on Amazon Bedrock in AWS GovCloud (US-West). This reasoning-first model provides configurable reasoning effort (none, low, medium, high) and strong tool use and instruction-following capabilities for building reliable agents. It also offers token efficiency to maintain cost-effectiveness for high-volume inference. Grok 4.3 is particularly suited for enterprise workloads such as customer support, web development, case law research, and financial document Q&A, delivering consistent, high-quality results across conversational AI, search, chat, and multi-turn workflows. The model runs on Mantle, a new inference engine in Amazon Bedrock designed for price performance, with support for tool calling, structured output, and response streaming.

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