Using AI21 Labs J2-Ultra on AWS Bedrock

Implementation guide · Jurassic-2 · AI21 Labs

Serverless

AWS Bedrock exposes AI21 Labs J2-Ultra through model ID ai21-j2-ultra. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-06-15. Next refresh: weekly.

Quick Start

1
Create an account at AWS Bedrock and generate an API key.
2
Use the AWS Bedrock SDK or REST API to call ai21-j2-ultra — see the documentation for request format.
3
You'll be billed $9.00/1M input, $9.00/1M output tokens. See full pricing.

API Portal Documentation Pricing

Code Examples

Install

pip install boto3

API key

AWS_ACCESS_KEY_ID

Model ID

ai21-j2-ultra

Use Amazon Bedrock model IDs, e.g. "anthropic.claude-3-opus-20240229-v1:0" for on-demand, or cross-region inference profile IDs like "us.anthropic.claude-opus-4-7-20251101-v1:0". These differ from the public model slug.

import boto3

# Reads AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, AWS_DEFAULT_REGION from env
client = boto3.client("bedrock-runtime", region_name="us-east-1")
response = client.converse(
    modelId="ai21-j2-ultra",
    messages=[{
        "role": "user",
        "content": [{"text": "Hello"}]
    }]
)
print(response["output"]["message"]["content"][0]["text"])