At 40 requests/user/day (totaling 12,000,000 queries/mo), running AI coding assistant on Gemini 3.5 Flash-Lite costs $79,872.00 / month ($7.987 / user / mo).
Total expected API invoice for 10,000 Active Users generating 12,000,000 queries.
Direct inference cost per MAU to model your SaaS pricing tiers and gross margins.
Savings generated by exploiting 60% cache hits on prompt context.
| Model | Provider | Monthly Spend (10,000 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| Gemini 3.5 Flash-Lite (Current) | $79,872.00 | $7.987 | $958,464.00 | 1,000,000 | |
| GPT-5.6 Luna | openai | $42,048.00 | $4.205 | $504,576.00 | 1,050,000 |
| GPT-5.4 mini | openai | $157,680.00 | $15.768 | $1,892,160.00 | 256,000 |
| GPT-5.4 nano | openai | $43,248.00 | $4.325 | $518,976.00 | 128,000 |
| GPT-4o mini | openai | $29,520.00 | $2.952 | $354,240.00 | 128,000 |
| Claude Haiku 4.5 | anthropic | $186,240.00 | $18.624 | $2,234,880.00 | 1,000,000 |
At 40 queries per user/day with Gemini 3.5 Flash-Lite, the estimated cost is $7.987 per monthly active user (MAU). Total monthly bill for 10,000 Active Users is $79,872.00.
Assuming a 60% cache hit rate on repeated system and context tokens, prompt caching saves $23,328.00 per month ($279,936.00/year) on Gemini 3.5 Flash-Lite.
With a direct COGS of $7.987 per user/month on Gemini 3.5 Flash-Lite, charging at least $39.936 per user/month ensures an 80%+ software gross margin.