Jurassic-2 Jumbo Base
Jurassic-2 Jumbo Base was one of the March 2023 text-completion models. The launch distinguished the Jumbo base model from a separate instruction-tuned Jumbo.
Access not confirmed
How the later name differs
In June 2023, AI21 simplified the range to instruction-capable models. The Jumbo size became Ultra.AI21 simplifies Jurassic-2 to Light, Mid and Ultra
Practical guidance. A historical Jumbo Base reference should not be treated as proof of identical weights or behavior under the later Ultra name.
Current access is not established
Practical guidance. This page preserves the distinct original base release. No current public API or weight distribution has been confirmed for this checkpoint.
Specifications & access
| Detail | Value and conditions |
|---|---|
| Status | Access not confirmed |
| Launch date | |
| Model identifiers | J2-jumbo |
| Release form | Base language modelJurassic-2 and task-specific API launch |
Related models
- Jurassic-2 Ultra
AI21 Labs · Jurassic-2
Largest instruction-capable Jurassic-2 tier for complex text comprehension and generation.
Launch date Access not confirmed - Jurassic-1 Jumbo
AI21 Labs · Jurassic-1
178-billion-parameter Jurassic-1 model with a wider, shallower Transformer design.
Launch date August 2021Access not confirmed