Head-to-Head Model Pricing & Benchmark Breakdown
DeepSeek V4 Flash vs GPT-5.6 Luna: The Sub-Cent Pricing Revolution
Can DeepSeek V4 Flash ($0.03/1M) beat OpenAI’s fastest intelligence ($0.20/1M)?
Adjust Your Custom Token Workload
Monthly Requests500k
Input Tokens / Req1200
Output Tokens / Req250
Prompt Cache %70%
DeepSeek V4 Flash is 91.3% More Cost-Effective
Saves $189.09 per month ($2,269.08/yr) at this volume.
Annualized Savings$2,269.08
DeepSeek
Most EconomicalDeepSeek V4 Flash
Total Monthly Cost
$17.91 / month
$0.036 per 1,000 requestsInput Tokens / 1M:$0.03
Cached Input / 1M:$0.003
Output Tokens / 1M:$0.09
Context Window:1.3M
Inference Speed:~180 TPS
OpenAI
GPT-5.6 Luna
Total Monthly Cost
$207.00 / month
$0.414 per 1,000 requestsInput Tokens / 1M:$0.20
Cached Input / 1M:$0.050
Output Tokens / 1M:$1.20
Context Window:1.1M
Inference Speed:~165 TPS
The Verdict: Which Model Wins on Cost & ROI?
DeepSeek V4 Flash is the cheapest 1M-context model in the world at $0.03 input / $0.09 output per million tokens (with 1.31M context). GPT-5.6 Luna offers higher reasoning benchmark accuracy.
Key Architectural & Economic Differences
- DeepSeek V4 Flash input is 85% cheaper ($0.03/1M vs $0.20/1M).
- DeepSeek V4 Flash output is 92.5% cheaper ($0.09/1M vs $1.20/1M).
- DeepSeek V4 Flash features a 1,310,720 context window vs 1,050,000 on Luna.
- GPT-5.6 Luna scores higher on MMLU (88.6% vs 89.4%) and complex instruction following.
When to Choose DeepSeek V4 Flash
- • Massive web crawling, document classification, translation, and log ingestion
- • Applications processing hundreds of millions of tokens monthly
- • Budget-constrained production applications
When to Choose GPT-5.6 Luna
- • Complex multi-step structured data extraction and tool calling
- • Customer-facing interactive support requiring highest conversational coherence
Detailed Spec & Pricing Comparison Table
| Specification / Metric | DeepSeek V4 Flash (DeepSeek) | GPT-5.6 Luna (OpenAI) | Advantage |
|---|---|---|---|
| Input Price / 1M Tokens | $0.03 | $0.20 | DeepSeek V4 Flash |
| Cached Input Price / 1M | $0.003 (90%) | $0.050 (75%) | DeepSeek V4 Flash |
| Output Price / 1M Tokens | $0.09 | $1.20 | DeepSeek V4 Flash |
| Context Window | 1.3M | 1.1M | DeepSeek V4 Flash |
| Inference Speed (Tokens/Sec) | ~180 TPS | ~165 TPS | DeepSeek V4 Flash |
| MMLU Benchmark Score | 89.4% | 88.6% | DeepSeek V4 Flash |
Frequently Asked Questions
Yes, DeepSeek V4 Flash is priced at just $0.03 per 1M input tokens and $0.09 per 1M output tokens with a 1.31M token context window.
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