token.app › Compare › DeepSeek V4 Flash 0731 vs GPT-5.6 Luna
DeepSeek V4 Flash 0731 vs GPT-5.6 Luna
GPT-5.6 Luna leads on 5 of 5 shared benchmarks. DeepSeek V4 Flash 0731 is 2.0× cheaper per token on a blended 3:1 basis. GPT-5.6 Luna accepts the larger context window (1.1M).
Head to head
Blended price uses a 3:1 input:output mix
| DeepSeek V4 Flash 0731 | GPT-5.6 Luna | |
|---|---|---|
| Provider | DeepSeek | OpenAI |
| Input $/1M | $0.090 | $0.100 |
| Output $/1M | $0.180 | $0.600 |
| Blended $/1M | $0.113 | $0.225 |
| Context window | 1.0M | 1.1M |
| Max output | 384K | 128K |
| Released | Jul 2026 | Jul 2026 |
| Licence | Open weights | Proprietary |
| GPQA Diamond | 91.0% | 91.6% |
| FrontierMath T1–3 | 57.5% | 82.1% |
| FrontierMath T4 | 24.4% | 61.0% |
| SimpleQA Verified | 34.7% | 41.7% |
| OTIS Mock AIME | 94.4% | 98.3% |
Benchmark scores independently run and published by Epoch AI, 'AI Benchmarking Hub', used under CC BY 4.0. Only benchmarks with a score for BOTH models are compared.
Choose DeepSeek V4 Flash 0731 if…
- Costs less per token — $0.113 vs $0.225 blended
- Open weights — self-hostable
- Newer model (released Jul 2026)
Choose GPT-5.6 Luna if…
- Higher GPQA Diamond (91.6% vs 91.0%)
- Higher FrontierMath T1–3 (82.1% vs 57.5%)
- Higher FrontierMath T4 (61.0% vs 24.4%)
- Higher SimpleQA Verified (41.7% vs 34.7%)
- Larger context window (1.1M)
FAQ
Which is better, DeepSeek V4 Flash 0731 or GPT-5.6 Luna?
Across the 5 benchmarks both models have independently-run scores for, DeepSeek V4 Flash 0731 leads on 0 and GPT-5.6 Luna leads on 5. Benchmarks are one input — price and context window are on this page too.
Is DeepSeek V4 Flash 0731 cheaper than GPT-5.6 Luna?
DeepSeek V4 Flash 0731 is cheaper: $0.113 versus $0.225 per million tokens blended at 3:1 input:output. Input alone: $0.090 vs $0.100. Output alone: $0.180 vs $0.600.
What context windows do DeepSeek V4 Flash 0731 and GPT-5.6 Luna have?
DeepSeek V4 Flash 0731: 1,048,576 tokens. GPT-5.6 Luna: 1,050,000 tokens.
Who makes DeepSeek V4 Flash 0731 and GPT-5.6 Luna?
DeepSeek V4 Flash 0731 is made by DeepSeek. GPT-5.6 Luna is made by OpenAI.
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