DeepSeek Reasoner vs DeepSeek V4 Flash 0731 (FlexAI, EU)
DeepSeek V4 Flash 0731 (FlexAI, EU) is cheaper on output tokens, while DeepSeek V4 Flash 0731 (FlexAI, EU) offers a larger context window. Choose DeepSeek Reasoner or DeepSeek V4 Flash 0731 (FlexAI, EU) based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | DeepSeek Reasoner | DeepSeek V4 Flash 0731 (FlexAI, EU) |
|---|---|---|
| Provider | DeepSeek | Eden AI |
| Input / 1M tokens | $0.14 | $0.12 |
| Output / 1M tokens | $0.28 | $0.24 |
| Context window | 1M | 1M |
| Parameters | — | — |
| Open weights | Yes | Yes |
| Released | Dec 2025 | Jul 2026 |
| GPQA Diamond score | 83.4 | — |
FAQ
Is DeepSeek Reasoner or DeepSeek V4 Flash 0731 (FlexAI, EU) cheaper?
DeepSeek V4 Flash 0731 (FlexAI, EU) is cheaper on output tokens ($0.24 vs $0.28 per 1M).
Which has the larger context window, DeepSeek Reasoner or DeepSeek V4 Flash 0731 (FlexAI, EU)?
DeepSeek V4 Flash 0731 (FlexAI, EU) has the larger context window (1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.