Jamba 1.5 Mini
Open Weights
AI21 Labs
AI21's small hybrid Mamba-Transformer (SSM) model (August 2024), with 52B total parameters and 12B active, delivering long-context efficiency at small scale. It offers a 256K context window (up to ~140K on a single GPU) at very low cost, ideal for document-heavy and agentic workloads.
Strengths
- Hybrid Mamba-Transformer (SSM) efficiency at small scale
- 256K context window (up to ~140K on one GPU)
- 52B total with only 12B active parameters
- Very low per-token pricing ($0.20/$0.20)
- Open weights, also on Amazon Bedrock
Caveats
- Small model - below larger LLMs on hard tasks
- Text-only (no vision input)
- Hybrid SSM tooling less standardized
- Vendor
- AI21 Labs
- Context Window
- 256,000 tokens
- Max Output
- 8,192 tokens
- License
- Jamba Open Model License
- Release Date
- 2024-08-22
- Modalities
- text
Capabilities
Vision
Audio
Video
Tool Use
Resources
Pricing
$0.20 per 1M input tokens, $0.20 per 1M output tokens via the AI21 API. Open weights under the Jamba Open Model License; also on Amazon Bedrock.