At 20 requests/user/day (totaling 6,000,000 queries/mo), running Content generation on o3 (Reasoning Frontier) costs $323,040.00 / month ($32.304 / user / mo).
Total expected API invoice for 10,000 Active Users generating 6,000,000 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 (10,000 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| o3 (Reasoning Frontier) (Current) | openai | $323,040.00 | $32.304 | $3,876,480.00 | 1,050,000 |
| GPT-5.6 Sol | openai | $233,520.00 | $23.352 | $2,802,240.00 | 1,050,000 |
| GPT-5.6 Cyber | openai | $583,800.00 | $58.38 | $7,005,600.00 | 1,050,000 |
| GPT-5.5 Standard | openai | $233,520.00 | $23.352 | $2,802,240.00 | 512,000 |
| GPT-5.5 Pro | openai | $1,401,120.00 | $140.112 | $16,813,440.00 | 512,000 |
| o3-pro (Frontier Reasoning) | openai | $646,080.00 | $64.608 | $7,752,960.00 | 1,000,000 |
At 20 queries per user/day with o3 (Reasoning Frontier), the estimated cost is $32.304 per monthly active user (MAU). Total monthly bill for 10,000 Active Users is $323,040.00.
Assuming a 30% cache hit rate on repeated system and context tokens, prompt caching saves $12,960.00 per month ($155,520.00/year) on o3 (Reasoning Frontier).
With a direct COGS of $32.304 per user/month on o3 (Reasoning Frontier), charging at least $161.52 per user/month ensures an 80%+ software gross margin.