At 6 requests/user/day (totaling 1,800 queries/mo), running Customer support chatbot on Claude Opus 5 costs $27.405 / month ($2.741 / user / mo).
Total expected API invoice for 10 Active Users generating 1,800 queries.
Direct inference cost per MAU to model your SaaS pricing tiers and gross margins.
Savings generated by exploiting 70% cache hits on prompt context.
| Model | Provider | Monthly Spend (10 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| Claude Opus 5 (Current) | anthropic | $27.405 | $2.741 | $328.86 | 1,000,000 |
| GPT-5.6 Sol | openai | $30.555 | $3.056 | $366.66 | 1,050,000 |
| GPT-5.6 Cyber | openai | $76.388 | $7.639 | $916.65 | 1,050,000 |
| GPT-5.5 Standard | openai | $30.555 | $3.056 | $366.66 | 512,000 |
| GPT-5.5 Pro | openai | $183.33 | $18.333 | $2,199.96 | 512,000 |
| o3-pro (Frontier Reasoning) | openai | $97.02 | $9.702 | $1,164.24 | 1,000,000 |
At 6 queries per user/day with Claude Opus 5, the estimated cost is $2.741 per monthly active user (MAU). Total monthly bill for 10 Active Users is $27.405.
Assuming a 70% cache hit rate on repeated system and context tokens, prompt caching saves $19.845 per month ($238.14/year) on Claude Opus 5.
With a direct COGS of $2.741 per user/month on Claude Opus 5, charging at least $13.702 per user/month ensures an 80%+ software gross margin.