At 6 requests/user/day (totaling 18,000,000 queries/mo), running Customer support chatbot on Claude 3.7 Sonnet (Hybrid Reasoning) costs $164,430.00 / month ($1.644 / user / mo).
Customer support chatbot for a 100,000 active users (high-volume consumer / enterprise) audience means 600,000 requests per day on average, each carrying 3,500 input and 350 output tokens at a 70% cacheable share — so the effective per-request cost on Claude 3.7 Sonnet (Hybrid Reasoning) is $0.009135, of which $119,070.00/mo comes back from prompt caching. Per active user that's $1.644/mo — the number to hold against your pricing tier and gross margin. Charging at least $8.222/user/mo keeps gross margin at or above 80%.
Quick answer
For 100,000 Active Users, Customer support chatbot on Claude 3.7 Sonnet (Hybrid Reasoning) is modeled at 18,000,000 requests per month, costing $164,430.00 per month or $1.644 per active user.
Method & trust
This projection combines the selected active-user tier, requests per user per day, input/output tokens per request, and the modeled cache share. It is an operating estimate, not a provider invoice; production traffic and retries should be measured against it.
Total expected API invoice for 100,000 Active Users generating 18,000,000 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 (100,000 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| Claude 3.7 Sonnet (Hybrid Reasoning) (Current) | anthropic | $164,430.00 | $1.644 | $1,973,160.00 | 200,000 |
| GPT-5.6 Sol | openai | $305,550.00 | $3.056 | $3,666,600.00 | 1,050,000 |
| GPT-5.6 Cyber | openai | $763,875.00 | $7.639 | $9,166,500.00 | 1,050,000 |
| GPT-5.5 Standard | openai | $305,550.00 | $3.056 | $3,666,600.00 | 512,000 |
| GPT-5.5 Pro | openai | $1,833,300.00 | $18.333 | $21,999,600.00 | 512,000 |
| o3-pro (Frontier Reasoning) | openai | $970,200.00 | $9.702 | $11,642,400.00 | 1,000,000 |
At 6 queries per user/day with Claude 3.7 Sonnet (Hybrid Reasoning), the estimated cost is $1.644 per monthly active user (MAU). Total monthly bill for 100,000 Active Users is $164,430.00.
Assuming a 70% cache hit rate on repeated system and context tokens, prompt caching saves $119,070.00 per month ($1,428,840.00/year) on Claude 3.7 Sonnet (Hybrid Reasoning).
With a direct COGS of $1.644 per user/month on Claude 3.7 Sonnet (Hybrid Reasoning), charging at least $8.222 per user/month ensures an 80%+ software gross margin.