Jamba 1.5 Review 2026
AI21 LabsLarge Language Model2024-084.2/5
Overview
AI21 Labs' hybrid SSM-Transformer model combining Mamba and Transformer architectures for efficient long-context processing. Unique architecture enables handling of extremely long documents with lower compute.
ProviderAI21 Labs
Context Window256K tokens
Pricing$0.20/$0.80 per 1M tokens
Capabilities
- ✓ Text generation
- ✓ Long-context processing
- ✓ Document analysis
- ✓ Summarization
- ✓ RAG optimization
- ✓ Structured outputs
Pricing
$0.20/$0.80 per 1M tokens
Pros & Cons
Pros
- +Unique hybrid architecture efficient for long-context tasks
- +256K context window with better memory efficiency
- +Competitive pricing for long-document workloads
- +Strong performance on RAG and document analysis tasks
Cons
- -Smaller model ecosystem and community than major providers
- -Less capable on general reasoning than top-tier models
- -Limited fine-tuning options and tooling available
Frequently Asked Questions
What is Jamba 1.5?▾
AI21 Labs' hybrid SSM-Transformer model combining Mamba and Transformer architectures for efficient long-context processing. Unique architecture enables handling of extremely long documents with lower compute.
How much does Jamba 1.5 cost?▾
Jamba 1.5 pricing: $0.20/$0.80 per 1M tokens
What is the context window for Jamba 1.5?▾
Jamba 1.5 supports a context window of 256K tokens.
When was Jamba 1.5 released?▾
Jamba 1.5 was released on 2024-08 by AI21 Labs.