At 40 requests/user/day (totaling 12,000 queries/mo), running AI coding assistant on Claude Sonnet 5 costs $372.48 / month ($37.248 / user / mo).
Total expected API invoice for 10 Active Users generating 12,000 queries.
Direct inference cost per MAU to model your SaaS pricing tiers and gross margins.
Savings generated by exploiting 60% cache hits on prompt context.
| Model | Provider | Monthly Spend (10 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| Claude Sonnet 5 (Current) | anthropic | $372.48 | $37.248 | $4,469.76 | 1,000,000 |
| GPT-5.6 Terra | openai | $420.48 | $42.048 | $5,045.76 | 1,050,000 |
| GPT-5.4 Workhorse | openai | $525.60 | $52.56 | $6,307.20 | 256,000 |
| o3-mini | openai | $216.48 | $21.648 | $2,597.76 | 200,000 |
| o4-mini | openai | $192.72 | $19.272 | $2,312.64 | 256,000 |
| o1-mini | openai | $216.48 | $21.648 | $2,597.76 | 128,000 |
At 40 queries per user/day with Claude Sonnet 5, the estimated cost is $37.248 per monthly active user (MAU). Total monthly bill for 10 Active Users is $372.48.
Assuming a 60% cache hit rate on repeated system and context tokens, prompt caching saves $155.52 per month ($1,866.24/year) on Claude Sonnet 5.
With a direct COGS of $37.248 per user/month on Claude Sonnet 5, charging at least $186.24 per user/month ensures an 80%+ software gross margin.