DeepSeek V3 vs DeepSeek V4.1 Flash Marathon
Both have similar output pricing, while DeepSeek V4.1 Flash Marathon offers a larger context window. Choose DeepSeek V3 or DeepSeek V4.1 Flash Marathon based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | DeepSeek V3 | DeepSeek V4.1 Flash Marathon |
|---|---|---|
| Provider | DeepSeek | Subconscious |
| Input / 1M tokens | $0.14 | $0.14 |
| Output / 1M tokens | $0.28 | $0.28 |
| Context window | 164K | 5M |
| Parameters | 671B | — |
| Open weights | Yes | Yes |
| Released | Dec 2025 | Sep 2026 |
| GPQA Diamond score | 67.6 | — |
| FrontierMath score | 1.7 | — |
| SWE-bench Verified score | 42.0 | — |
| Epoch Capabilities Index score | 136 | — |
| LMArena (Chatbot Arena) Elo score | 1375 | — |
FAQ
Is DeepSeek V3 or DeepSeek V4.1 Flash Marathon cheaper?
DeepSeek V3 and DeepSeek V4.1 Flash Marathon have comparable output pricing.
Which has the larger context window, DeepSeek V3 or DeepSeek V4.1 Flash Marathon?
DeepSeek V4.1 Flash Marathon has the larger context window (5M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.