Grok 4.3 Available on Amazon Bedrock

What's new

• Grok 4.3 GA on Bedrock: first AWS-native distribution channel for Grok.
• 1M token context: for long documents and codebases.
• Configurable reasoning effort: none / low / medium / high.
• Mantle inference engine: new backend for lower latency.
• Tool calling, structured output, streaming: standard enterprise feature parity.
• On-demand pricing: $1.25/M input, $2.50/M output, $0.20/M cached input — cheapest US-lab frontier reasoning model on Bedrock.

Why it matters

Enterprises that previously had to go direct to xAI can now procure and bill Grok via AWS Marketplace. For regulated workloads it simplifies procurement and IAM through existing Bedrock controls.

How to try it

Amazon Bedrock console, available in all US regions. Standard Bedrock IAM permissions.