Jurassic-2 Mid
Jurassic-2 Mid was the middle instruction-capable tier, replacing the Grande size name in the simplified 2023 range.
Access not confirmed
A prompt-completion interface
The historical Bedrock API used a text prompt, a maximum completion length and stop sequences. It also exposed separate presence, count and frequency penalties for repeated text.Jurassic-2's historical Amazon Bedrock request format
Practical guidance. A migration must update the request and response handling. Replacing a model name alone does not convert a completion integration into a chat integration.
Historical documentation is not a live endpoint
AI21 announced Jurassic deprecation for Q3 2024 and recommended moving to Jamba.AI21's historical Jurassic-to-Jamba migration notice
Practical guidance. The remaining API reference documents the old interface. It does not by itself confirm that new customers can use Mid today.
Specifications & access
| Detail | Value and conditions |
|---|---|
| Status | Access not confirmed |
| Launch date | |
| Model identifiers | J2-Midj2-midJ2-Grande Instructai21.j2-mid-v1 |
| Historical instruction-model name | Grande InstructJurassic-2 and task-specific API launchAI21 simplifies Jurassic-2 to Light, Mid and Ultra |
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