At 8 requests/user/day (totaling 2,400 queries/mo), running Agentic workflow on GPT-5.4 Workhorse costs $153.60 / month ($15.36 / user / mo).
Total expected API invoice for 10 Active Users generating 2,400 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 (10 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| GPT-5.4 Workhorse (Current) | openai | $153.60 | $15.36 | $1,843.20 | 256,000 |
| GPT-5.6 Terra | openai | $122.88 | $12.288 | $1,474.56 | 1,050,000 |
| o3-mini | openai | $87.12 | $8.712 | $1,045.44 | 200,000 |
| o4-mini | openai | $69.96 | $6.996 | $839.52 | 256,000 |
| o1-mini | openai | $87.12 | $8.712 | $1,045.44 | 128,000 |
| Claude Sonnet 5 | anthropic | $115.68 | $11.568 | $1,388.16 | 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 10 Active Users is $153.60.
Assuming a 65% cache hit rate on repeated system and context tokens, prompt caching saves $140.40 per month ($1,684.80/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.