At 40 requests/user/day (totaling 12,000,000 queries/mo), running AI coding assistant on GPT-5.5 Standard costs $1,051,200.00 / month ($105.12 / user / mo).
Total expected API invoice for 10,000 Active Users generating 12,000,000 queries.
Direct inference cost per MAU to model your SaaS pricing tiers and gross margins.
Savings generated by exploiting 60% cache hits on prompt context.
| Model | Provider | Monthly Spend (10,000 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| GPT-5.5 Standard (Current) | openai | $1,051,200.00 | $105.12 | $12,614,400.00 | 512,000 |
| GPT-5.6 Sol | openai | $1,051,200.00 | $105.12 | $12,614,400.00 | 1,050,000 |
| GPT-5.6 Cyber | openai | $2,628,000.00 | $262.80 | $31,536,000.00 | 1,050,000 |
| GPT-5.5 Pro | openai | $6,307,200.00 | $630.72 | $75,686,400.00 | 512,000 |
| o3-pro (Frontier Reasoning) | openai | $3,244,800.00 | $324.48 | $38,937,600.00 | 1,000,000 |
| o3 (Reasoning Frontier) | openai | $1,622,400.00 | $162.24 | $19,468,800.00 | 1,050,000 |
At 40 queries per user/day with GPT-5.5 Standard, the estimated cost is $105.12 per monthly active user (MAU). Total monthly bill for 10,000 Active Users is $1,051,200.00.
Assuming a 60% cache hit rate on repeated system and context tokens, prompt caching saves $388,800.00 per month ($4,665,600.00/year) on GPT-5.5 Standard.
With a direct COGS of $105.12 per user/month on GPT-5.5 Standard, charging at least $525.60 per user/month ensures an 80%+ software gross margin.