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DeepSeek V4.1 Flash vs GPT-6 Luna: which is smarter?
DeepSeek V4.1 Flash has an SI-IQ of 128 and GPT-6 Luna has 130. The table compares them area by area using only independent benchmark results.
Data as of Oct 18, 2026 · method 1.0.0
| Metric | DeepSeek V4.1 Flash | GPT-6 Luna |
|---|---|---|
| SI-IQ | 128125–131 | 130127–133 |
| Reasoning | 132 | 126 |
| Math | 126 | 132 |
| Knowledge | 125 | 126 |
| Developer | DeepSeek | OpenAI |
| Released | Sep 9, 2026 | Sep 22, 2026 |
| Access | Open weights (restricted licence) | API access |
| Price in / out (USD per 1M tokens) | — | $0.10 / $0.50 |
| Benchmarks used | 9 | 9 |
DeepSeek V4.1 FlashGPT-6 Luna
The difference of 2 points is within the statistical uncertainty: the two models are roughly on par.
Data sources: Epoch AI, ‘Capabilities & benchmarking’ (CC BY 4.0); LiteLLM, model_prices_and_context_window.json (MIT); Source: OpenRouter (openrouter.ai), licensed under CC BY 4.0: reuse and republish with attribution to OpenRouter (licences and changes).