Grok 4.3 from xAI now available in Amazon Bedrock

What's new

• 1M token context: long documents and multi-turn agent sessions without chunking.
• Configurable reasoning effort: none / low / medium / high — trade latency for quality per request.
• Native video input + tool calling: build agents over video content using standard Bedrock tool-use APIs.
• $1.25 per 1M input tokens: one of the most affordable frontier reasoning models on Bedrock.

Why it matters

Grok has been mostly an X/grok.com surface so far. Bedrock GA means AWS-centric enterprises can adopt it through IAM, VPC endpoints and existing Bedrock guardrails — no new vendor onboarding required.

How to try it

In the AWS console go to Bedrock → Model access → xAI Grok 4.3, enable the model, then call via the standard Bedrock InvokeModel / Converse APIs.