At 4 requests/user/day (totaling 120,000 queries/mo), running Document summarization on GPT-5.4 mini costs $2,371.50 / month ($2.372 / user / mo).
Total expected API invoice for 1,000 Active Users generating 120,000 queries.
Direct inference cost per MAU to model your SaaS pricing tiers and gross margins.
Savings generated by exploiting 10% cache hits on prompt context.
| Model | Provider | Monthly Spend (1,000 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| GPT-5.4 mini (Current) | openai | $2,371.50 | $2.372 | $28,458.00 | 256,000 |
| GPT-5.6 Luna | openai | $632.40 | $0.6324 | $7,588.80 | 1,050,000 |
| GPT-5.4 nano | openai | $636.00 | $0.636 | $7,632.00 | 128,000 |
| GPT-4o mini | openai | $470.70 | $0.4707 | $5,648.40 | 128,000 |
| Claude Haiku 4.5 | anthropic | $3,090.00 | $3.09 | $37,080.00 | 1,000,000 |
| Claude 3.5 Haiku | anthropic | $2,472.00 | $2.472 | $29,664.00 | 200,000 |
At 4 queries per user/day with GPT-5.4 mini, the estimated cost is $2.372 per monthly active user (MAU). Total monthly bill for 1,000 Active Users is $2,371.50.
Assuming a 10% cache hit rate on repeated system and context tokens, prompt caching saves $202.50 per month ($2,430.00/year) on GPT-5.4 mini.
With a direct COGS of $2.372 per user/month on GPT-5.4 mini, charging at least $11.858 per user/month ensures an 80%+ software gross margin.