jamba-1.5-large · AI21 Labs
Hybrid SSM-Transformer (Mamba) architecture: 398B total (94B active) delivering ultra-efficient 256K long-context throughput at $2.00/$8.00.
Last checked Aug 19, 2026. Calculations use the listed base rates; provider-specific tiers, cache writes, batch pricing, and long-context rules may differ. Confirm the current rate at the official provider source.
Input
$2.00
per 1M tokens
Output
$8.00
per 1M tokens
Cached input
—
not published
Context window
256K
max output 4.1K
AI21 Jamba 1.5 Large cost calculator
What AI21 Jamba 1.5 Large costs per task
| Use case | Input tokens | Output tokens | Cost / request | Monthly @ 1K req/day |
|---|---|---|---|---|
| Customer support chatbot | 3,500 | 350 | $0.0098 | $294.00 |
| RAG / search-augmented answers | 8,000 | 500 | $0.02 | $600.00 |
| AI coding assistant | 12,000 | 2,000 | $0.04 | $1,200.00 |
| Document summarization | 25,000 | 600 | $0.0548 | $1,644.00 |
| Agentic workflow | 40,000 | 1,500 | $0.092 | $2,760.00 |
| Content generation | 800 | 1,200 | $0.0112 | $336.00 |
| Data extraction & tagging | 2,000 | 250 | $0.006 | $180.00 |
| Translation | 5,000 | 5,500 | $0.054 | $1,620.00 |
Assumes each use case's typical cacheable share of input. See full cost scenarios.
Compare with alternatives
| Model | Input /M | Output /M | Context | Chat request* |
|---|---|---|---|---|
| AI21 Jamba 1.5 Large | $2.00 | $8.00 | 256K | $0.0144 |
| GPT-5.6 Sol | $5.00 | $30.00 | 1.1M | $0.035 |
| GPT-5.6 Terra | $2.00 | $12.00 | 1.1M | $0.014 |
| GPT-5.6 Luna | $0.20 | $1.20 | 1.1M | $0.0014 |
| GPT-5.6 Cyber | $12.50 | $75.00 | 1.1M | $0.0875 |
| GPT-5.5 Standard | $5.00 | $30.00 | 512K | $0.035 |
| GPT-5.5 Pro | $30.00 | $180.00 | 512K | $0.21 |
| GPT-5.4 Workhorse | $2.50 | $15.00 | 256K | $0.0175 |
| GPT-5.4 mini | $0.75 | $4.50 | 256K | $0.00525 |
*4,000 in + 800 out tokens, 50% cached input where available.
Related calculations
FAQ
AI21 Jamba 1.5 Large costs $2.00 per 1M input tokens and $8.00 per 1M output tokens. Verified Aug 19, 2026 against https://www.ai21.com/pricing.
AI21 Jamba 1.5 Large supports a 256,000-token context window with up to 4,096 output tokens per request, tokenized with tiktoken_cl100k.
At $2.00/M input and $8.00/M output, AI21 Jamba 1.5 Large sits below GPT-5.6 Sol ($5.00/M in, $30.00/M out) — see the comparison table for full-workload differences.