Last refreshed 2026-05-11. Next refresh: weekly.
Why use AI21 Labs J2-Ultra on AWS Bedrock?
AWS Bedrock offers AI21 Labs J2-Ultra with pay-as-you-go pricing at $9.00/1M input tokens. AWS Bedrock is Amazon's fully managed foundation-model service, providing unified API access to top models from Anthropic, Meta, Mistral, and other leading AI labs with built-in tools for RAG, fine-tuning, and AI agent development.
Input / 1M
$9.00
Output / 1M
$9.00
Cache
Not sourced
Batch
Not sourced
Setup recipe
Python + curlInstall
pip install boto3Auth
export AWS_ACCESS_KEY_ID=...Call
import boto3
client = boto3.client("bedrock-runtime", region_name="us-east-1")
response = client.converse(
modelId="ai21-j2-ultra",Model ID
ai21-j2-ultraRequest example
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"])Gotchas
- 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.
- The endpoint template includes a region segment; set the same region in your SDK/client configuration.
- The examples expect AWS_ACCESS_KEY_ID; rename it only if your application config maps the new variable.
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $9.00 |
| Output tokens | $9.00 |
Capabilities
Structured Outputs
About AI21 Labs J2-Ultra
AI21 Labs J2-Ultra via AWS Bedrock
FAQ
What does AI21 Labs J2-Ultra cost on AWS Bedrock?
On AWS Bedrock, AI21 Labs J2-Ultra costs $9.0 per 1M input tokens and $9.0 per 1M output tokens.
What is the context window for AI21 Labs J2-Ultra on AWS Bedrock?
AI21 Labs J2-Ultra supports a 8,192 token context window on AWS Bedrock.
Who created AI21 Labs J2-Ultra?
AI21 Labs J2-Ultra was created by AI21 Labs as part of the Jurassic-2 model family.
Is AI21 Labs J2-Ultra open source?
AI21 Labs J2-Ultra is not open source; the seed data lists it as proprietary.
Get Started
Model Specs
Released2021-08-09
Context8K
ArchitectureDecoder Only