How much does a document summarizer cost on DeepSeek V4 Flash 0423?
Running a tool that summarizes ~10-page documents; much of this traffic can run on batch APIs on DeepSeek V4 Flash 0423 costs about $18.25/month for 300 users × 4 messages/day: that's $0.061 per user and $0.51 per 1,000 requests.
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Assumptions
- 300 users × 4 messages/day (36,000 per month)
- System prompt 300 tokens, user input 6,000, output 600 tokens
- Prompt cache hit rate 30%, 50% of traffic on batch pricing
- DeepSeek V4 Flash 0423 list price: $0.091/1M input, $0.182/1M output, $0.0182/1M cached input; context window 1,048,576 tokens
How DeepSeek V4 Flash 0423 compares for a document summarizer
1 of 14 other popular models are cheaper for this workload. Cheapest isn't always best: check the quality index, and consider routing easy requests to a cheap model and only hard ones to a frontier model.
| Model | Quality | Monthly | Per user |
|---|---|---|---|
| GPT-5 Nano | 13 | $14.88 | $0.050 |
| DeepSeek V4 Flash 0423 | 24.4 | $18.25 | $0.061 |
| Gemini 2.5 Flash Lite | 10.4 | $23.22 | $0.077 |
| Claude Haiku 5.5 | 43.4 | $25.03 | $0.083 |
| Llama 4 Maverick | 9.3 | $42.13 | $0.14 |
| DeepSeek V4 Pro 0423 | 30.4 | $77.50 | $0.26 |
| Gemini 3.8 Flash | 40.9 | $195 | $0.65 |
| GPT-5.4 Mini | 24.1 | $199 | $0.66 |
| Grok 4.3 | 24.9 | $301 | $1.00 |
| Grok 4.7 | 46.4 | $434 | $1.45 |
| Gemini 4 Argon | 52.6 | $488 | $1.63 |
| GPT-6.1 Sol | 51.8 | $500 | $1.67 |
| Claude Sonnet 5.5 | 56 | $500 | $1.67 |
| Claude Opus 5.5 | 57.6 | $1,001 | $3.34 |
| GPT-5.5 | 38.4 | $1,326 | $4.42 |
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Prices: OpenRouter list prices (USD per 1M tokens), updated 2026-10-15. Estimates only; a month is 30 days. See how the math works.