Grok 4.3 Now Available on Amazon Bedrock with 1M-Token Context
xAI
xAI's Grok 4.3 became generally available through Amazon Bedrock on June 17, 2026. The model features a 1-million-token context window, configurable reasoning effort (none/low/medium/high), and native video input. Pricing on Bedrock is $1.25/M input tokens and $2.50/M output tokens. The model runs on Mantle, Amazon's new inference engine, and supports tool calling, structured output, and streaming.
Why it matters
Bedrock availability brings Grok 4.3 into one of the most widely used enterprise cloud AI platforms, giving AWS developers access to a 1M-context reasoning model inside existing IAM and VPC infrastructure.
Importance: 3/5
Notable distribution milestone — Grok 4.3 joins Amazon Bedrock, reaching enterprise developers without a separate xAI API agreement.
Sources
official
Grok on Amazon Bedrock