Grok on Amazon Bedrock

Today, we’re excited to announce that Grok 4.3 is now generally available on Amazon Bedrock.

Grok 4.3 achieves the lowest hallucination rate among frontier models, offers 1-million-token context window, and supports configurable reasoning efforts (none, low, medium, high). Now, Amazon Bedrock users can leverage the model through Bedrock’s secure and reliable inference engine.

Leading Performance in Enterprise

Grok 4.3 is one of the strongest models available today for building enterprise-ready AI agents:

#1 on Artificial Analysis Omniscience benchmark*, achieving the lowest hallucination rate among frontier models.
#1 on Artificial Analysis Tau2 Telecom benchmark*, which evaluates real-world tool-calling performance in customer support agent scenarios.
#1 on Vals AI Case Law and Corporate Finance benchmarks, which measure Grok's capabilities in complex document understanding tasks.

* In comparison to major frontier labs

Capabilities & Pricing

Grok 4.3 sits on the Pareto frontier for intelligence versus cost, delivering 2-10x more intelligence per dollar than other frontier models.

Input: $1.25 per 1 million tokens
Output: $2.50 per 1 million tokens

It features a 1 million context window that handles extremely long documents and codebases with ease. Developers can also configure reasoning: Use none for maximum speed on simple requests, or low / medium / high to scale reasoning effort to the difficulty of the problem.

Build with Grok 4.3 on Amazon Bedrock

Grok 4.3 is now available to all developers in supported AWS Regions.

curl https://bedrock-mantle.us-west-2.api.aws/openai/v1/responses \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $BEDROCK_API_KEY" \
  -d '{
    "model": "grok-4.3",
    "input": "What is the meaning of life?",
    "reasoning": {
        "effort": "low"
    },
    "include": ["reasoning.encrypted_content"]
  }'

To get started, please visit the Grok on Amazon Bedrock documentation. We're excited to see what you build!