At 8 requests/user/day (totaling 600,000 queries/mo), running Agentic workflow on Gemma 4 31B Instruct costs $6,675.00 / month ($2.67 / user / mo).
Total expected API invoice for 2,500 Active Users generating 600,000 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 (2,500 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| Gemma 4 31B Instruct (Current) | $6,675.00 | $2.67 | $80,100.00 | 128,000 | |
| GPT-5.6 Terra | openai | $30,720.00 | $12.288 | $368,640.00 | 1,050,000 |
| GPT-5.4 Workhorse | openai | $38,400.00 | $15.36 | $460,800.00 | 256,000 |
| o3-mini | openai | $21,780.00 | $8.712 | $261,360.00 | 200,000 |
| o4-mini | openai | $17,490.00 | $6.996 | $209,880.00 | 256,000 |
| o1-mini | openai | $21,780.00 | $8.712 | $261,360.00 | 128,000 |
At 8 queries per user/day with Gemma 4 31B Instruct, the estimated cost is $2.67 per monthly active user (MAU). Total monthly bill for 2,500 Active Users is $6,675.00.
Assuming a 65% cache hit rate on repeated system and context tokens, prompt caching saves $0.00 per month ($0.00/year) on Gemma 4 31B Instruct.
With a direct COGS of $2.67 per user/month on Gemma 4 31B Instruct, charging at least $13.35 per user/month ensures an 80%+ software gross margin.