At 6 requests/user/day (totaling 90,000 queries/mo), running Customer support chatbot on Pixtral Large costs $422.10 / month ($0.8442 / user / mo).
Total expected API invoice for 500 Active Users generating 90,000 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 (500 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| Pixtral Large (Current) | mistral | $422.10 | $0.8442 | $5,065.20 | 128,000 |
| GPT-5.6 Sol | openai | $1,527.75 | $3.056 | $18,333.00 | 1,050,000 |
| GPT-5.6 Cyber | openai | $3,819.375 | $7.639 | $45,832.50 | 1,050,000 |
| GPT-5.5 Standard | openai | $1,527.75 | $3.056 | $18,333.00 | 512,000 |
| GPT-5.5 Pro | openai | $9,166.50 | $18.333 | $109,998.00 | 512,000 |
| o3-pro (Frontier Reasoning) | openai | $4,851.00 | $9.702 | $58,212.00 | 1,000,000 |
At 6 queries per user/day with Pixtral Large, the estimated cost is $0.8442 per monthly active user (MAU). Total monthly bill for 500 Active Users is $422.10.
Assuming a 70% cache hit rate on repeated system and context tokens, prompt caching saves $396.90 per month ($4,762.80/year) on Pixtral Large.
With a direct COGS of $0.8442 per user/month on Pixtral Large, charging at least $4.221 per user/month ensures an 80%+ software gross margin.