Introducing Grok on Amazon Bedrock
AWS Machine Learning Melanie Li ● Covered by 4 sources
xAI's Grok 4.3 model is now available on Amazon Bedrock, accessible through OpenAI-compatible APIs and featuring a 1 million token context window for long documents. The model supports configurable reasoning effort levels, tool calling, structured output, image input, and multi-turn conversations, with xAI claiming it ranks first on multiple benchmarks including Artificial Analysis Omniscience and Tau2 Telecom. Users can access Grok 4.3 through region-specific Mantle endpoints using either long-term API keys or short-term bearer tokens generated from IAM credentials.
Why it matters
This post covers what makes Grok 4.3 a great fit for agentic and enterprise workloads, how you access it through Amazon Bedrock, and how to use the capabilities most teams reach for first: a basic chat request, configurable reasoning effort, tool calling, structured output, image input, and stateful multi-turn conversations.
Also covered by
- The New Stack — Musk open-sourced Grok Build to fight Anthropic. Anthropic pays him $1.25 billion a month.
- The Neuron — Grok Build is now open source for customizable coding agent development
- MarkTechPost — SpaceXAI Open-Sources Grok Build: The Rust Agent Harness, TUI, and Tool Layer Behind Its Coding CLI
