Simulating realistic Agentic workflow parameters (40,000 in / 1,500 out with 65% cache reuse). Gemini 3.5 Flash (OpenRouter) delivers a 58% cost reduction over AI21 Jamba 1.5 Large.
| Traffic Volume Tier | AI21 Jamba 1.5 Large Monthly | Gemini 3.5 Flash (OpenRouter) Monthly | Monthly Savings by picking Gemini 3.5 Flash (OpenRouter) |
|---|---|---|---|
| 1,000 reqs/mo (Dev/Testing) | $92.00 | $38.40 | Save $53.60 / mo |
| 10,000 reqs/mo (Small App) | $920.00 | $384.00 | Save $536.00 / mo |
| 100,000 reqs/mo (Growth Production) | $9,200.00 | $3,840.00 | Save $5,360.00 / mo |
| 1,000,000 reqs/mo (Scale SaaS) | $92,000.00 | $38,400.00 | Save $53,600.00 / mo |
Gemini 3.5 Flash (OpenRouter) is 58% cheaper for Agentic workflow workloads. At standard Agentic workflow parameter ratios (40,000 input tokens, 1,500 output tokens, 65% cache hit), Gemini 3.5 Flash (OpenRouter) costs $0.0384 per request compared to $0.092 on AI21 Jamba 1.5 Large.
AI21 Jamba 1.5 Large offers a context window of 256,000 tokens (max output: 4,096), while Gemini 3.5 Flash (OpenRouter) offers 1,048,576 tokens (max output: 65,536).
At 100,000 requests per month, using Gemini 3.5 Flash (OpenRouter) saves $5,360.00 every month (or $64,320.00 annually) compared to AI21 Jamba 1.5 Large.
Prompt caching is the single biggest lever — each step re-reads prior context. Summarize or prune tool outputs before appending them to the transcript. Cap the step budget; runaway loops are the #1 surprise on agent invoices.