Side-by-side comparison of Grok-2 (xAI · USA) and Jamba 1.5 Large (AI21 Labs · Israel) for self-hosted deployment of the open-weight model. Grok-2 is rated conditional; Jamba 1.5 Large is conditional. They part ways on licence: Grok-2 is "Grok 2 Community", Jamba 1.5 Large is "Jamba Open".
| Field | ||
|---|---|---|
| Summary | ||
| Verdict | Conditional xAI's first open-weights release. Commercial use allowed under the Grok 2 Community License with xAI's Acceptable Use Policy. Notable restriction: weights cannot be used to train other models (distillation ban). 500GB model, needs 8 GPUs with 40GB+. | Conditional SSM-Transformer hybrid (Mamba) with 256K context. Jamba Open Model License permits commercial use below $50M annual revenue; above that, paid licence required. Israel jurisdiction; EU adequacy decision in place. |
| Last reviewed | 2026-04-16 | 2026-04-15 |
| Open-weight | ||
| Licence | Grok 2 Community | Jamba Open |
| Commercial use | Yes (w/ AUP) | Under $50M rev. |
| Training data | Undisclosed | Undisclosed |
| Origin | USA | Israel |
| Performance & pricing? | ||
| Quality index | 14/100 | 11/100 |
| Speed | — | — |
| Blended price | — | $3.50/M |
| Context window | — | — |
| Evidence | ||
| Sources | ||
No overlapping sources between the two entries.