At 20 requests/user/day (totaling 6,000,000 queries/mo), running Content generation on Gemini 3.1 Flash Lite (OpenRouter) costs $11,676.00 / month ($1.168 / user / mo).
Content generation for a 10,000 active users (scale-up saas) audience means 200,000 requests per day on average, each carrying 800 input and 1,200 output tokens at a 30% cacheable share — so the effective per-request cost on Gemini 3.1 Flash Lite (OpenRouter) is $0.001946, of which $324.00/mo comes back from prompt caching. Per active user that's $1.168/mo — the number to hold against your pricing tier and gross margin. Charging at least $5.838/user/mo keeps gross margin at or above 80%.
Quick answer
For 10,000 Active Users, Content generation on Gemini 3.1 Flash Lite (OpenRouter) is modeled at 6,000,000 requests per month, costing $11,676.00 per month or $1.168 per active user.
Method & trust
This projection combines the selected active-user tier, requests per user per day, input/output tokens per request, and the modeled cache share. It is an operating estimate, not a provider invoice; production traffic and retries should be measured against it.
Total expected API invoice for 10,000 Active Users generating 6,000,000 queries.
Direct inference cost per MAU to model your SaaS pricing tiers and gross margins.
Savings generated by exploiting 30% cache hits on prompt context.
| Model | Provider | Monthly Spend (10,000 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| Gemini 3.1 Flash Lite (OpenRouter) (Current) | $11,676.00 | $1.168 | $140,112.00 | 1,048,576 | |
| GPT-5.6 Luna | openai | $9,340.80 | $0.9341 | $112,089.60 | 1,050,000 |
| GPT-5.4 mini | openai | $35,028.00 | $3.503 | $420,336.00 | 256,000 |
| GPT-5.4 nano | openai | $9,700.80 | $0.9701 | $116,409.60 | 128,000 |
| GPT-4o mini | openai | $4,932.00 | $0.4932 | $59,184.00 | 128,000 |
| Claude Haiku 4.5 | anthropic | $39,504.00 | $3.95 | $474,048.00 | 1,000,000 |
At 20 queries per user/day with Gemini 3.1 Flash Lite (OpenRouter), the estimated cost is $1.168 per monthly active user (MAU). Total monthly bill for 10,000 Active Users is $11,676.00.
Assuming a 30% cache hit rate on repeated system and context tokens, prompt caching saves $324.00 per month ($3,888.00/year) on Gemini 3.1 Flash Lite (OpenRouter).
With a direct COGS of $1.168 per user/month on Gemini 3.1 Flash Lite (OpenRouter), charging at least $5.838 per user/month ensures an 80%+ software gross margin.