At 4 requests/user/day (totaling 1,200 queries/mo), running Document summarization on Ministral 3 8B costs $4.203 / month ($0.4203 / user / mo).
Total expected API invoice for 10 Active Users generating 1,200 queries.
Direct inference cost per MAU to model your SaaS pricing tiers and gross margins.
Savings generated by exploiting 10% cache hits on prompt context.
| Model | Provider | Monthly Spend (10 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| Ministral 3 8B (Current) | mistral | $4.203 | $0.4203 | $50.436 | 128,000 |
| GPT-5.6 Luna | openai | $6.324 | $0.6324 | $75.888 | 1,050,000 |
| GPT-5.4 mini | openai | $23.715 | $2.372 | $284.58 | 256,000 |
| GPT-5.4 nano | openai | $6.36 | $0.636 | $76.32 | 128,000 |
| GPT-4o mini | openai | $4.707 | $0.4707 | $56.484 | 128,000 |
| Claude Haiku 4.5 | anthropic | $30.90 | $3.09 | $370.80 | 1,000,000 |
At 4 queries per user/day with Ministral 3 8B, the estimated cost is $0.4203 per monthly active user (MAU). Total monthly bill for 10 Active Users is $4.203.
Assuming a 10% cache hit rate on repeated system and context tokens, prompt caching saves $0.405 per month ($4.86/year) on Ministral 3 8B.
With a direct COGS of $0.4203 per user/month on Ministral 3 8B, charging at least $2.101 per user/month ensures an 80%+ software gross margin.