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Jamba Reasoning 3B

AI21 LabsOpen WeightsPending Human Review

Jamba Reasoning 3B is an AI21 language-model release. A compact reasoning specialization for local devices and efficient long-context agents. Post-training combines supervised, preference, and reinforcement-learning methods to support mathematics, code, instruction following, and general reasoning. The documented default context is 256K; claims of extended 1M processing are not treated as a uniform deployment guarantee. Long context does not guarantee complete retrieval or factual correctness, and deployed throughput depends on hardware, precision, and prompt length.

2025-10-08
3B
Hybrid Mamba state-space / Transformer; MoE in larger tiers
Apache-2.0

Specifications

Parameters
3B
Architecture
Hybrid Mamba state-space / Transformer; MoE in larger tiers
License
Apache-2.0
Context Window
262,144 tokens
Type
text
Modalities
text

Benchmark Scores

Advanced Specifications

Model Family
Jamba
API Access
Not Available
Chat Interface
Not Available
Variants
Full precisionQuantized formats

Capabilities & Limitations

Capabilities
text generationlong contextinstruction following
Known Limitations
Long-input quality requires task evaluationLicense and weight footprint vary by tier
Notable Use Cases
enterprise question answeringdocument assistantsprivate deployment

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