At 8 requests/user/day (totaling 12,000 queries/mo), running Agentic workflow on GPT-5.4 Workhorse costs $768.00 / month ($15.36 / user / mo).
Total expected API invoice for 50 Active Users generating 12,000 queries.
Direct inference cost per MAU to model your SaaS pricing tiers and gross margins.
Savings generated by exploiting 65% cache hits on prompt context.
| Model | Provider | Monthly Spend (50 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| GPT-5.4 Workhorse (Current) | openai | $768.00 | $15.36 | $9,216.00 | 256,000 |
| GPT-5.6 Terra | openai | $614.40 | $12.288 | $7,372.80 | 1,050,000 |
| o3-mini | openai | $435.60 | $8.712 | $5,227.20 | 200,000 |
| o4-mini | openai | $349.80 | $6.996 | $4,197.60 | 256,000 |
| o1-mini | openai | $435.60 | $8.712 | $5,227.20 | 128,000 |
| Claude Sonnet 5 | anthropic | $578.40 | $11.568 | $6,940.80 | 1,000,000 |
At 8 queries per user/day with GPT-5.4 Workhorse, the estimated cost is $15.36 per monthly active user (MAU). Total monthly bill for 50 Active Users is $768.00.
Assuming a 65% cache hit rate on repeated system and context tokens, prompt caching saves $702.00 per month ($8,424.00/year) on GPT-5.4 Workhorse.
With a direct COGS of $15.36 per user/month on GPT-5.4 Workhorse, charging at least $76.80 per user/month ensures an 80%+ software gross margin.