AWS: xAI's Grok 4.3 Now Available on Amazon Bedrock

xAI’s Grok 4.3 model is now available on Amazon Bedrock, AWS’s managed platform that gives companies access to foundation AI models without needing their own inference infrastructure. This is news about distribution availability — not the premiere of a new system.

What Is Amazon Bedrock?

Amazon Bedrock is AWS’s managed service that lets organizations use foundation AI models from various providers through a single, standardized API. Instead of contracting separately with individual AI companies and setting up their own infrastructure, users access models directly within the AWS ecosystem — using familiar tools for security, billing, and access management.

What Capabilities Does Grok 4.3 Bring to Bedrock?

Grok 4.3 on Bedrock supports configurable reasoning effort, meaning users can adjust how many resources the model expends on more demanding inference. Also available are tool calling, structured output, image input, and multi-turn conversations. The model runs on the Mantle inference engine with an OpenAI-compatible API, which eases migration for teams already using OpenAI-compatible integrations.

Why Does Distribution Matter More Than the Premiere?

Grok 4.3’s availability on Bedrock extends the reach of xAI’s model into the enterprise segment that gravitates toward the AWS ecosystem. Bedrock already hosts models from Anthropic, Meta, Mistral AI, and Amazon (Nova series) — Grok 4.3 enters that catalog as another option for teams choosing a model based on benchmark performance or price. AWS had not published per-token pricing at the time of the announcement, but the platform typically applies per-token billing or pre-purchased capacity.