At 15 requests/user/day (totaling 22,500 queries/mo), running Translation on GPT-5.5 Pro costs $25,194.375 / month ($503.888 / user / mo).
Total expected API invoice for 50 Active Users generating 22,500 queries.
Direct inference cost per MAU to model your SaaS pricing tiers and gross margins.
Savings generated by exploiting 15% cache hits on prompt context.
| Model | Provider | Monthly Spend (50 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| GPT-5.5 Pro (Current) | openai | $25,194.375 | $503.888 | $302,332.50 | 512,000 |
| GPT-5.6 Sol | openai | $4,199.063 | $83.981 | $50,388.75 | 1,050,000 |
| GPT-5.6 Cyber | openai | $10,497.656 | $209.953 | $125,971.875 | 1,050,000 |
| GPT-5.5 Standard | openai | $4,199.063 | $83.981 | $50,388.75 | 512,000 |
| o3-pro (Frontier Reasoning) | openai | $11,846.25 | $236.925 | $142,155.00 | 1,000,000 |
| o3 (Reasoning Frontier) | openai | $5,923.125 | $118.463 | $71,077.50 | 1,050,000 |
At 15 queries per user/day with GPT-5.5 Pro, the estimated cost is $503.888 per monthly active user (MAU). Total monthly bill for 50 Active Users is $25,194.375.
Assuming a 15% cache hit rate on repeated system and context tokens, prompt caching saves $455.625 per month ($5,467.50/year) on GPT-5.5 Pro.
With a direct COGS of $503.888 per user/month on GPT-5.5 Pro, charging at least $2,519.438 per user/month ensures an 80%+ software gross margin.