Simulating realistic Agentic workflow parameters (40,000 in / 1,500 out with 65% cache reuse). Devstral 2 (2512) (OpenRouter) delivers a 79% cost reduction over Grok 4.6 Flagship.
| Traffic Volume Tier | Grok 4.6 Flagship Monthly | Devstral 2 (2512) (OpenRouter) Monthly | Monthly Savings by picking Devstral 2 (2512) (OpenRouter) |
|---|---|---|---|
| 1,000 reqs/mo (Dev/Testing) | $50.00 | $10.604 | Save $39.396 / mo |
| 10,000 reqs/mo (Small App) | $500.00 | $106.04 | Save $393.96 / mo |
| 100,000 reqs/mo (Growth Production) | $5,000.00 | $1,060.40 | Save $3,939.60 / mo |
| 1,000,000 reqs/mo (Scale SaaS) | $50,000.00 | $10,604.00 | Save $39,396.00 / mo |
Devstral 2 (2512) (OpenRouter) is 79% cheaper for Agentic workflow workloads. At standard Agentic workflow parameter ratios (40,000 input tokens, 1,500 output tokens, 65% cache hit), Devstral 2 (2512) (OpenRouter) costs $0.0106 per request compared to $0.05 on Grok 4.6 Flagship.
Grok 4.6 Flagship offers a context window of 500,000 tokens (max output: 64,000), while Devstral 2 (2512) (OpenRouter) offers 262,144 tokens (max output: 209,715).
At 100,000 requests per month, using Devstral 2 (2512) (OpenRouter) saves $3,939.60 every month (or $47,275.20 annually) compared to Grok 4.6 Flagship.
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.