At 20 requests/user/day (totaling 6,000 queries/mo), running Content generation on o3-pro (Frontier Reasoning) costs $646.08 / month ($64.608 / user / mo).
Total expected API invoice for 10 Active Users generating 6,000 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 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| o3-pro (Frontier Reasoning) (Current) | openai | $646.08 | $64.608 | $7,752.96 | 1,000,000 |
| GPT-5.6 Sol | openai | $233.52 | $23.352 | $2,802.24 | 1,050,000 |
| GPT-5.6 Cyber | openai | $583.80 | $58.38 | $7,005.60 | 1,050,000 |
| GPT-5.5 Standard | openai | $233.52 | $23.352 | $2,802.24 | 512,000 |
| GPT-5.5 Pro | openai | $1,401.12 | $140.112 | $16,813.44 | 512,000 |
| o3 (Reasoning Frontier) | openai | $323.04 | $32.304 | $3,876.48 | 1,050,000 |
At 20 queries per user/day with o3-pro (Frontier Reasoning), the estimated cost is $64.608 per monthly active user (MAU). Total monthly bill for 10 Active Users is $646.08.
Assuming a 30% cache hit rate on repeated system and context tokens, prompt caching saves $25.92 per month ($311.04/year) on o3-pro (Frontier Reasoning).
With a direct COGS of $64.608 per user/month on o3-pro (Frontier Reasoning), charging at least $323.04 per user/month ensures an 80%+ software gross margin.