DeepSeek V3.1 Terminus vs DeepSeek V4 Flash 0731
Price, context window & benchmark comparison
VS
Compare different models
Verdict: DeepSeek V4 Flash 0731 is 4.2× cheaper than DeepSeek V3.1 Terminus on a typical 3:1 input/output mix. DeepSeek V4 Flash 0731 has the larger context window (1M vs 164K).
| DeepSeek V3.1 Terminus | DeepSeek V4 Flash 0731 | |
|---|---|---|
| Input price / 1M | $0.27 | $0.0434 |
| Output price / 1M | $1.00 | $0.30 |
| Blended price (3:1) | $0.45 | $0.11 |
| Cached input / 1M | — | $0.035 |
| Context window | 164K | 1M |
| Max output | 147K | 944K |
| Intelligence index | — | — |
| Coding index | 43.5 | 69.1 |
| Providers | — | 27 |
| Best provider uptime (30m) | — | 100.0% |
| Vision input | No | No |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2025-09-22 | 2026-07-31 |
| Retirement | — | — |
Cost calculator
FAQ
Which is cheaper, DeepSeek V3.1 Terminus or DeepSeek V4 Flash 0731?
DeepSeek V4 Flash 0731 is 4.2× cheaper than DeepSeek V3.1 Terminus on a typical 3:1 input/output mix.
DeepSeek V3.1 Terminus vs DeepSeek V4 Flash 0731: which has a bigger context window?
DeepSeek V3.1 Terminus: 163,840 tokens. DeepSeek V4 Flash 0731: 1,048,576 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: DeepSeek V3.1 Terminus ≈ $1,040, DeepSeek V4 Flash 0731 ≈ $236.80.
More comparisons
DeepSeek V3.1 Terminus vs Gemini 4 CarbonDeepSeek V3.1 Terminus vs Claude Fable 5.2DeepSeek V3.1 Terminus vs Gemini Omni 1.2 FlashDeepSeek V3.1 Terminus vs Gemini Omni 1.1 FlashDeepSeek V3.1 Terminus vs Hy4DeepSeek V3.1 Terminus vs GLM 5.3 FlashX LegalDeepSeek V3.1 Terminus vs GPT-6.1 TerraDeepSeek V3.1 Terminus vs GPT-6.1 Terra ProDeepSeek V3.1 Terminus vs Kimi K3.1 ProDeepSeek V3.1 Terminus vs MiniMax M3.1 FlashDeepSeek V3.1 Terminus vs DeepSeek V4.1 Flash 1017DeepSeek V3.1 Terminus vs Nemotron 3.5 Super VLDeepSeek V3.1 Terminus vs Gemini 4 ArgonDeepSeek V3.1 Terminus vs Claude Haiku 5.5DeepSeek V3.1 Terminus vs Nano Banana 2.1DeepSeek V3.1 Terminus vs Mistral Large 4DeepSeek V4 Flash 0731 vs Gemini 4 CarbonDeepSeek V4 Flash 0731 vs Claude Fable 5.2DeepSeek V4 Flash 0731 vs Gemini Omni 1.2 FlashDeepSeek V4 Flash 0731 vs Gemini Omni 1.1 FlashDeepSeek V4 Flash 0731 vs Hy4DeepSeek V4 Flash 0731 vs GLM 5.3 FlashX LegalDeepSeek V4 Flash 0731 vs GPT-6.1 TerraDeepSeek V4 Flash 0731 vs GPT-6.1 Terra Pro