At 40 requests/user/day (totaling 12,000 queries/mo), running AI coding assistant on DeepSeek V4 Flash costs $58.234 / month ($5.823 / user / mo).
AI coding assistant for a 10 active users (alpha / internal testing) audience means 400 requests per day on average, each carrying 12,000 input and 2,000 output tokens at a 60% cacheable share — so the effective per-request cost on DeepSeek V4 Flash is $0.004853, of which $36.806/mo comes back from prompt caching. Per active user that's $5.823/mo — the number to hold against your pricing tier and gross margin. Charging at least $29.117/user/mo keeps gross margin at or above 80%.
Quick answer
For 10 Active Users, AI coding assistant on DeepSeek V4 Flash is modeled at 12,000 requests per month, costing $58.234 per month or $5.823 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 10 Active Users generating 12,000 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 (10 Active Users) | Cost / User / Mo | Annual Spend | Context Limit |
|---|---|---|---|---|---|
| DeepSeek V4 Flash (Current) | deepseek | $58.234 | $5.823 | $698.803 | 1,000,000 |
| GPT-5.6 Luna | openai | $42.048 | $4.205 | $504.576 | 1,050,000 |
| GPT-5.4 mini | openai | $157.68 | $15.768 | $1,892.16 | 256,000 |
| GPT-5.4 nano | openai | $43.248 | $4.325 | $518.976 | 128,000 |
| GPT-4o mini | openai | $29.52 | $2.952 | $354.24 | 128,000 |
| Claude Haiku 4.5 | anthropic | $186.24 | $18.624 | $2,234.88 | 1,000,000 |
At 40 queries per user/day with DeepSeek V4 Flash, the estimated cost is $5.823 per monthly active user (MAU). Total monthly bill for 10 Active Users is $58.234.
Assuming a 60% cache hit rate on repeated system and context tokens, prompt caching saves $36.806 per month ($441.677/year) on DeepSeek V4 Flash.
With a direct COGS of $5.823 per user/month on DeepSeek V4 Flash, charging at least $29.117 per user/month ensures an 80%+ software gross margin.