At 4 requests/user/day (totaling 300,000 queries/mo), running Document summarization on o1-mini costs $8,629.50 / month ($3.452 / user / mo).
Total expected API invoice for 2,500 Active Users generating 300,000 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 (2,500 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| o1-mini (Current) | openai | $8,629.50 | $3.452 | $103,554.00 | 128,000 |
| GPT-5.6 Terra | openai | $15,810.00 | $6.324 | $189,720.00 | 1,050,000 |
| GPT-5.4 Workhorse | openai | $19,762.50 | $7.905 | $237,150.00 | 256,000 |
| o3-mini | openai | $8,629.50 | $3.452 | $103,554.00 | 200,000 |
| o4-mini | openai | $8,423.25 | $3.369 | $101,079.00 | 256,000 |
| Claude Sonnet 5 | anthropic | $15,450.00 | $6.18 | $185,400.00 | 1,000,000 |
At 4 queries per user/day with o1-mini, the estimated cost is $3.452 per monthly active user (MAU). Total monthly bill for 2,500 Active Users is $8,629.50.
Assuming a 10% cache hit rate on repeated system and context tokens, prompt caching saves $412.50 per month ($4,950.00/year) on o1-mini.
With a direct COGS of $3.452 per user/month on o1-mini, charging at least $17.259 per user/month ensures an 80%+ software gross margin.