Jamba Reasoning 3B
Local reasoning at 3B scale; evaluate against Qwen and LFM2.5 thinking models before committing, since AI21 publishes no hosted endpoint for it.
Data checked 2026-09-06
Other notable labs
ga
open weights
ai21labs/AI21-Jamba-Reasoning-3B
- Context window
- —
- Max output
- —
- Input
- — per 1M tokens
- Output
- — per 1M tokens
- Parameters
- 3B
- Licence
- Apache 2.0
A What it is for
B Capabilities
| Input modalities | text |
|---|---|
| Output modalities | text |
C Others from Other notable labs
| Model | Context | Max out | In $/M | Out $/M | Blended | Status |
|---|---|---|---|---|---|---|
Jamba Large 1.7
jamba-large-1.7
|
262.1K | 4.1K | $2.00 | $8.00 | $3.50 | ga open |
Jamba Mini 1.7
jamba-mini-1.7
|
256K | 4.1K | $0.20 | $0.40 | $0.25 | retired open |
Jamba2 Mini
ai21labs/AI21-Jamba2-Mini
|
256K | — | — | — | — | ga open |
Jamba2 3B
ai21labs/AI21-Jamba2-3B
|
256K | — | — | — | — | ga open |
Reka Core
reka-core
|
— | — | $2.00 | $6.00 | $3.00 | ga |
Reka Flash
reka-flash
|
— | — | $0.80 | $2.00 | $1.10 | ga |
Reka Edge (reka-edge-2603)
reka-edge
|
— | — | $0.10 | $0.10 | $0.10 | ga open |
Reka Flash 3.1
RekaAI/reka-flash-3.1
|
— | — | — | — | — | ga open |
Olmo 3.1 32B Think
allenai/Olmo-3.1-32B-Think
|
65.5K | 32.8K | — | — | — | ga open |
Olmo 3.1 32B Instruct
allenai/Olmo-3.1-32B-Instruct
|
65.5K | — | — | — | — | ga open |
Olmo 3 32B Base
allenai/Olmo-3-32B
|
65.5K | — | — | — | — | ga open |
Olmo 3 7B Instruct
allenai/Olmo-3-7B-Instruct
|
65.5K | 32.8K | — | — | — | ga open |
How this model is billed. Exists and is real (ai21labs/AI21-Jamba-Reasoning-3B on Hugging Face, Apache 2.0, ~256K/262,144-token context), but AI21 does not sell it per token. ai21.com/pricing lists only two models: Jamba Mini ($0.2/1M in, $0.4/1M out) and Jamba Large ($2/1M in, $8/1M out). AI21's own docs 'Model Availability by Platform' page shows the AI21 SaaS managed tier serving only the Jamba Mini/Large line; Jamba Re
D Verify before you commit
Model pricing changes without notice and this page is a snapshot. Confirm against the vendor's own page before you build a budget on it.
Source: ai21.com · checked 2026-09-06 · Other notable labs pricing · API docs