xAI’s Grok 4.6 is now available in Amazon Bedrock

What moved

xAI's Grok 4.6 is now available in Amazon Bedrock: a frontier model for long-running agents, coding, and knowledge work, with a 500K token context window and four reasoning effort levels. It runs on both the bedrock-mantle and bedrock-runtime endpoints, with Converse API and cross-Region inference support. AWS issued this as an official post on 2026-09-21. The desk files the title and summary from the allow-listed official source, not a rewrite of claims the source did not make.

Why it matters

xAI's Grok 4.6 is now available in Amazon Bedrock: a frontier model for long-running agents, coding, and knowledge work, with a 500K token context window and four reasoning… That is a public launch file from AWS, dated 2026-09-21. Tagged Agents / Enterprise.

On the record

• Filed from the AWS official RSS on 2026-09-21.
• Primary source host: aws.amazon.com.
• xAI's Grok 4.6 is now available in Amazon Bedrock: a frontier model for long-running agents, coding, and knowledge work, with a 500K token context window and four reasoning effort levels.