At 40 requests/user/day (totaling 600,000 queries/mo), running AI coding assistant on Claude Opus 5 costs $46,560.00 / month ($93.12 / user / mo).
Total expected API invoice for 500 Active Users generating 600,000 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 (500 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| Claude Opus 5 (Current) | anthropic | $46,560.00 | $93.12 | $558,720.00 | 1,000,000 |
| GPT-5.6 Sol | openai | $52,560.00 | $105.12 | $630,720.00 | 1,050,000 |
| GPT-5.6 Cyber | openai | $131,400.00 | $262.80 | $1,576,800.00 | 1,050,000 |
| GPT-5.5 Standard | openai | $52,560.00 | $105.12 | $630,720.00 | 512,000 |
| GPT-5.5 Pro | openai | $315,360.00 | $630.72 | $3,784,320.00 | 512,000 |
| o3-pro (Frontier Reasoning) | openai | $162,240.00 | $324.48 | $1,946,880.00 | 1,000,000 |
At 40 queries per user/day with Claude Opus 5, the estimated cost is $93.12 per monthly active user (MAU). Total monthly bill for 500 Active Users is $46,560.00.
Assuming a 60% cache hit rate on repeated system and context tokens, prompt caching saves $19,440.00 per month ($233,280.00/year) on Claude Opus 5.
With a direct COGS of $93.12 per user/month on Claude Opus 5, charging at least $465.60 per user/month ensures an 80%+ software gross margin.