At 40 requests/user/day (totaling 60,000,000 queries/mo), running AI coding assistant on Mistral Small 4 costs $121,680.00 / month ($2.434 / user / mo).
Total expected API invoice for 50,000 Active Users generating 60,000,000 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 (50,000 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| Mistral Small 4 (Current) | mistral | $121,680.00 | $2.434 | $1,460,160.00 | 128,000 |
| GPT-5.6 Luna | openai | $210,240.00 | $4.205 | $2,522,880.00 | 1,050,000 |
| GPT-5.4 mini | openai | $788,400.00 | $15.768 | $9,460,800.00 | 256,000 |
| GPT-5.4 nano | openai | $216,240.00 | $4.325 | $2,594,880.00 | 128,000 |
| GPT-4o mini | openai | $147,600.00 | $2.952 | $1,771,200.00 | 128,000 |
| Claude Haiku 4.5 | anthropic | $931,200.00 | $18.624 | $11,174,400.00 | 1,000,000 |
At 40 queries per user/day with Mistral Small 4, the estimated cost is $2.434 per monthly active user (MAU). Total monthly bill for 50,000 Active Users is $121,680.00.
Assuming a 60% cache hit rate on repeated system and context tokens, prompt caching saves $58,320.00 per month ($699,840.00/year) on Mistral Small 4.
With a direct COGS of $2.434 per user/month on Mistral Small 4, charging at least $12.168 per user/month ensures an 80%+ software gross margin.