At 20 requests/user/day (totaling 30,000,000 queries/mo), running Content generation on GPT-4o mini costs $24,660.00 / month ($0.4932 / user / mo).
Total expected API invoice for 50,000 Active Users generating 30,000,000 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 (50,000 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| GPT-4o mini (Current) | openai | $24,660.00 | $0.4932 | $295,920.00 | 128,000 |
| GPT-5.6 Luna | openai | $46,704.00 | $0.9341 | $560,448.00 | 1,050,000 |
| GPT-5.4 mini | openai | $175,140.00 | $3.503 | $2,101,680.00 | 256,000 |
| GPT-5.4 nano | openai | $48,504.00 | $0.9701 | $582,048.00 | 128,000 |
| Claude Haiku 4.5 | anthropic | $197,520.00 | $3.95 | $2,370,240.00 | 1,000,000 |
| Claude 3.5 Haiku | anthropic | $158,016.00 | $3.16 | $1,896,192.00 | 200,000 |
At 20 queries per user/day with GPT-4o mini, the estimated cost is $0.4932 per monthly active user (MAU). Total monthly bill for 50,000 Active Users is $24,660.00.
Assuming a 30% cache hit rate on repeated system and context tokens, prompt caching saves $540.00 per month ($6,480.00/year) on GPT-4o mini.
With a direct COGS of $0.4932 per user/month on GPT-4o mini, charging at least $2.466 per user/month ensures an 80%+ software gross margin.