At 4 requests/user/day (totaling 60,000 queries/mo), running Document summarization on Grok 4.3 costs $1,807.50 / month ($3.615 / user / mo).
Total expected API invoice for 500 Active Users generating 60,000 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 (500 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| Grok 4.3 (Current) | xai | $1,807.50 | $3.615 | $21,690.00 | 1,000,000 |
| GPT-5.6 Terra | openai | $3,162.00 | $6.324 | $37,944.00 | 1,050,000 |
| GPT-5.4 Workhorse | openai | $3,952.50 | $7.905 | $47,430.00 | 256,000 |
| o3-mini | openai | $1,725.90 | $3.452 | $20,710.80 | 200,000 |
| o4-mini | openai | $1,684.65 | $3.369 | $20,215.80 | 256,000 |
| o1-mini | openai | $1,725.90 | $3.452 | $20,710.80 | 128,000 |
At 4 queries per user/day with Grok 4.3, the estimated cost is $3.615 per monthly active user (MAU). Total monthly bill for 500 Active Users is $1,807.50.
Assuming a 10% cache hit rate on repeated system and context tokens, prompt caching saves $157.50 per month ($1,890.00/year) on Grok 4.3.
With a direct COGS of $3.615 per user/month on Grok 4.3, charging at least $18.075 per user/month ensures an 80%+ software gross margin.