Grok 4.3 Now Available on Amazon Bedrock
AWS ML Blog · rss · 2026-07-17
According to the AWS ML Blog, xAI's Grok 4.3 is now officially available on Amazon Bedrock, making xAI one of the platform's model providers.
The post highlights Grok 4.3's key features: adjustable reasoning effort, robust tool use and instruction following, suitability for agentic and enterprise workflows, support for text and image inputs, and a massive 1 million token context window. It emphasizes the model's applicability in scenarios like long-document processing, multi-turn conversations, contract review, credit agreement analysis, and financial document Q&A.
The article also details access methods: Bedrock Mantle uses an OpenAI-compatible API, accessible via the OpenAI SDK or direct HTTPS calls. It lists defaults for parameters like temperature, topp, and maxcompletiontokens, along with authentication methods including long-term API keys and short-term bearer tokens.
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