Jurassic-1 Jumbo
A 178-billion-parameter general language model released through AI21 Studio's open-beta API and interactive web environment.
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Why this model scores 36.4
Jurassic-1 Jumbo provided GPT-3-scale general language capability with immediate public API access, but little demonstrated independent agency. Service-controlled access moderated diffusion, misuse accessibility, and residual control difficulty.
News tied to Jurassic-1 Jumbo
The model score of 36.4 rates this model's risk profile. The overall Doom Index of 66.8 measures the complete temporally weighted evidence record. These values answer different questions.
Each article's current Doom Index contribution is divided equally among the exact models named on that article. This prevents multi-model evidence from being claimed in full on several model pages. Model risk scores use a bounded temporal offset around their technical profile, but never feed back into the overall index.
AI21 opens Jurassic-1 Jumbo through a public beta API
AI21 Labs launched AI21 Studio in open beta with immediate API and web access to Jurassic-1 Jumbo, a 178-billion-parameter general language model.
- Full item contribution
- +0.02
- Jurassic-1 Jumbo equal share
- +0.02
Model score history
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R4
Doom Score 36.4
Source-backed model availability audit using the model's existing primary or authoritative catalogue evidence. Exact-version evidence chronology replayed under temporal-monthly-pressure-v4.
12 Aug 2026 -
R3
Doom Score 36.4
Exact-version evidence chronology replayed after run doombench-hourly-news-20260812-142416 under temporal-monthly-pressure-v4.
12 Aug 2026 -
R2
Doom Score 37.8
Exact-version evidence chronology replayed after run doombench-hourly-news-20260812-132112 under fixed-sensitivity-v3.
12 Aug 2026 -
R1
Doom Score 39.6
New exact public model released during the August 2021 window.
12 Aug 2026