Calculator › Compare › DeepSeek V4.1 Flash vs GPT-6 Luna
✓ Prices checked against official pricing pages on October 19, 2026DeepSeek V4.1 Flash vs GPT-6 Luna: cost comparison
For a typical chatbot reply, GPT-6 Luna is 2.7× cheaper than DeepSeek V4.1 Flash ($0.35 vs $0.93 per 1,000 replies).
DeepSeek V4.1 Flash DeepSeek
$0.30input /1M
$0.006cached /1M
$1.20output /1M
- Off-peak (outside 01:00–04:00 and 06:00–10:00 UTC on weekdays): 50% off, i.e. $0.15 input / $0.60 output.
GPT-6 Luna OpenAI
$0.10input /1M
$0.01cached /1M
$0.50output /1M
- Prompts over 272,000 tokens are billed at $0.20 input / $0.02 cached / $0.75 output per 1M tokens for the whole request.
- Batch processing: 50% off input and output ($0.05 / $0.25 per 1M tokens).
Cost per 1,000 requests
| Workload | DeepSeek V4.1 Flash | GPT-6 Luna | Difference |
|---|---|---|---|
| Chatbot reply1,500 input / 400 output tokens | $0.93 | $0.35 | 2.7× |
| RAG answer8,000 input / 600 output tokens | $3.12 | $1.10 | 2.8× |
| Agent step30,000 input (80% cached) / 800 output | $2.90 | $1.24 | 2.3× |
| Summarize a long report60,000 input / 1,200 output tokens | $19.44 | $6.60 | 2.9× |
| Classify a ticket400 input / 10 output tokens | $0.132 | $0.045 | 2.9× |
Standard pricing, no batch discount. Price is only one factor; quality, speed, context length and rate limits matter too, so test both on your own prompts.
Run your own numbers in the calculator →
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