How much does an AI coding agent cost on DeepSeek V4 Flash 0423?
Running a multi-step coding agent that reads files, calls tools and re-sends its growing context every step on DeepSeek V4 Flash 0423 costs about $1,726/month for 200 users × 10 tasks/day: that's $8.63 per user and $28.77 per 1,000 tasks.
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Assumptions
- 200 users × 10 tasks/day (60,000 per month)
- System prompt 6,000 tokens, retrieved context 8,000 tokens, user input 300, output 800 + 1,500 reasoning tokens
- Agent loop: 12 LLM calls per task, 2 tool call(s) per step at 1500 tokens each; context is re-sent every step
- Prompt cache hit rate 80%
- 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 an AI coding agent
DeepSeek V4 Flash 0423 is the cheapest of the 12 popular models we track 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 |
|---|---|---|---|
| DeepSeek V4 Flash 0423 | 24.4 | $1,726 | $8.63 |
| Claude Haiku 5.5 | 43.4 | $2,313 | $11.57 |
| DeepSeek V4 Pro 0423 | 30.4 | $6,369 | $31.85 |
| Gemini 3.8 Flash | 40.9 | $13,760 | $68.80 |
| GPT-5.4 Mini | 24.1 | $17,581 | $87.91 |
| Grok 4.3 | 24.9 | $22,636 | $113 |
| Gemini 4 Argon | 52.6 | $31,672 | $158 |
| Grok 4.7 | 46.4 | $43,402 | $217 |
| GPT-6.1 Sol | 51.8 | $44,109 | $221 |
| Claude Sonnet 5.5 | 56 | $44,109 | $221 |
| Claude Opus 5.5 | 57.6 | $88,219 | $441 |
| GPT-5.5 | 38.4 | $117,209 | $586 |
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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.