Jurassic-2 Model Renaming: No Action Needed Thanks to Automatic Rerouting

We're happy to share some exciting updates about our Jurassic models at AI21 Studio. In our quest to make our services as user-friendly and intuitive as possible, we have made some changes to the names of our models. However, we want to reassure you that no immediate action is required on your part as we have implemented an automatic rerouting system to ensure uninterrupted service. Here are the details:

Model Renaming

We've simplified our Jurassic-2 model offerings by updating our existing model names. "J2-Large" is now "J2-Light". Both "J2-Grande" and "J2-Grande-Instruct" are now "J2-Mid". Finally, "J2-Jumbo" and "J2-Jumbo-Instruct" have been consolidated under "J2-Ultra". The new names better represent the relative size and capabilities of each model, aiding you in selecting the right model for your needs.

Instruct Capabilities for All Models

We're thrilled to inform you that all of our renamed models now come standard with instruct capabilities. This allows for both zero-shot and few-shot prompting, offering enhanced performance and versatility for your tasks.

Automatic Rerouting: Foundation Models

To ensure a seamless transition, we have set up an automatic rerouting system. Whether you're using our API or Python SDK, if you continue to use the old model names, our system will automatically reroute your requests to the corresponding new models. Here's a full list of how the rerouting will work:

Requests to will be rerouted to

Requests to and
will be rerouted to

Requests to and
will be rerouted to

Automatic Rerouting: Custom Models

Just as the Jurassic-2 foundation models are automatically rerouted, requests for custom models originally trained on J2-Jumbo, J2-Grande, and J2-Large will now be automatically redirected to their corresponding versions: J2-Ultra, J2-Mid, and J2-Light, respectively

Even though no immediate action is required, we advise you to gradually update your code to incorporate the new model names for clarity and consistency.

For more insights into why we initiated these changes, please read our recent blog post: Simplifying Our Jurassic-2 Offering.

As always, we're here to assist! Please feel free to reach out with any questions or concerns on our Discord server or through our usual channels.

Thank you for your continued support, and we look forward to assisting you in leveraging the power of Jurassic-2!