Jamba Reasoning 3B is AI21 Labs's language model. A 3-billion-parameter reasoning-focused Jamba model from AI21 Labs, designed for logical inference and structured problem-solving tasks.
Specifications
Canonical IDai21-jamba-3b-reasoning
TypeLanguage
StatusActive
CreatorAI21 LabsAI21 Labs
Input ModalitiesText
Output ModalitiesText
Parameters3B
Benchmarks
Intelligence Index
4.1
#426
Math Index
10.7
#223
MMLU-Pro
0.6
#255
GPQA
0.3
#413
HLE
0.0
#340
LiveCodeBench
0.2
#248
IFBench
0.5
#146
Time to First Token
SciCode
0.1
#437
AIME 2025
0.1
#223
LCR
0.1
#322
TerminalBench Hard
0.0
#329
TAU2
0.2
#337
Output TPS
0.0
#260

Capabilities

Input1/5
Text
Image·
Audio·
Video·
PDF·
Output1/5
Text
Image·
Audio·
Video·
Embedding·
Capabilities0/13
Reasoning·
Adaptive Reasoning·
Function Calling·
Parallel Function Calling·
Structured Outputs·
Native JSON Schema·
Web Search·
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching·
Assistant Prefill·

Cheapest Instances to Run It

Cloud GPU instances that can host Jamba Reasoning 3B, ranked by cheapest on-demand price. The model needs about 7 GB of GPU memory at FP16 precision (estimated from its parameter count), so treat the fit as guidance rather than a guarantee.

All clouds
FP16 (full precision)
US Dollar ($)
Instance
Cloud
GPU
VRAM
Price
Cheapest region
Standard_NV4as_v4AzureAMD Radeon Instinct MI2516 GB$0.233/hrwestus2
g4ad.xlargeAWSRadeon Pro V5208 GB$0.379/hrus-east-1
g5g.xlargeAWST4g16 GB$0.420/hrus-east-1
7 more instances can run Jamba Reasoning 3B
Unlock the full ranked list and FP8 / INT4 quantization with a CloudPrice subscription.

Versions

VersionReleasedContextInput / 1MOutput / 1MStatus
Jamba 1.7 Large256K$2.00$8.00Available
Jamba 1.5 Large256K$2.00$8.00Deprecating
Jamba 1.5 Mini256K$0.200$0.400Deprecating
Jamba 1.6 Large256K$2.00$8.00Available
Jamba 1.7 Mini256K$0.200$0.400Available
Jamba 1.6 Mini256K$0.200$0.400Available
Jamba 1.5256K$0.200$0.400Available
Jamba Reasoning 3BCurrent
Jamba Instruct256K$0.500$0.700Available

Model IDs

ai21-jamba-3b-reasoning
jamba-reasoning-3b