J
Jamba (AI21)
31
Stack Score
Editorial pick✓ Verified working
Jamba (AI21)
Hybrid Mamba-Transformer LLM with 256K context.
Try Jamba (AI21)✓ Free trial available
Best for
Best for teams running long-context workloads where token cost is the binding constraint.
At a glance
- Pricing
- paid
- Setup time
- 1 hour
- Learning curve
- moderate
- Last verified
- 5/25/2026
What we love
- ✓Long-context economics beat GPT/Claude
- ✓Strong RAG performance
- ✓Self-host option for sensitive data
Where it falls short
- −Smaller ecosystem than OpenAI/Anthropic
- −Quality below frontier on creative tasks
- −Less tooling support
Pricing
✓ Pricing verified Jun 21, 20262 tiers
API
Usage
per token
- ✓Pay as you go
Enterprise
Custom
annual
- ✓Self-host
- ✓SOC 2
Overview
Jamba is AI21's production-grade hybrid Mamba/Transformer LLM. Famous for its 256K context window and unusually low cost per long-context token. Strong on retrieval and summarization workloads.
Key features
- ●256K token context
- ●Hybrid Mamba/Transformer
- ●Cheap long-context tokens
- ●API + self-host
- ●SOC 2
Best use cases
Long-document summarization
Summarize 200-page documents in one shot without aggressive chunking.
Cheap retrieval augmentation
Build a RAG system that won't bankrupt you when context windows are huge.
Integrations
Similar tools
See all LLMs →One AI Stack pick every week.
The tool we’d pay for this week, why we’d pay for it, and what we’d skip. No promo spam.