At 4 requests/user/day (totaling 300,000 queries/mo), running Document summarization on DeepSeek V3 (Chat) costs $1,005.90 / month ($0.4024 / user / mo).
Total expected API invoice for 2,500 Active Users generating 300,000 queries.
Direct inference cost per MAU to model your SaaS pricing tiers and gross margins.
Savings generated by exploiting 10% cache hits on prompt context.
| Model | Provider | Monthly Spend (2,500 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| DeepSeek V3 (Chat) (Current) | deepseek | $1,005.90 | $0.4024 | $12,070.80 | 64,000 |
| GPT-5.6 Luna | openai | $1,581.00 | $0.6324 | $18,972.00 | 1,050,000 |
| GPT-5.4 mini | openai | $5,928.75 | $2.372 | $71,145.00 | 256,000 |
| GPT-5.4 nano | openai | $1,590.00 | $0.636 | $19,080.00 | 128,000 |
| GPT-4o mini | openai | $1,176.75 | $0.4707 | $14,121.00 | 128,000 |
| Claude Haiku 4.5 | anthropic | $7,725.00 | $3.09 | $92,700.00 | 1,000,000 |
At 4 queries per user/day with DeepSeek V3 (Chat), the estimated cost is $0.4024 per monthly active user (MAU). Total monthly bill for 2,500 Active Users is $1,005.90.
Assuming a 10% cache hit rate on repeated system and context tokens, prompt caching saves $94.50 per month ($1,134.00/year) on DeepSeek V3 (Chat).
With a direct COGS of $0.4024 per user/month on DeepSeek V3 (Chat), charging at least $2.012 per user/month ensures an 80%+ software gross margin.