Compare · updated 2026-11-01
DeepSeek Flash vs Kimi K3.1 Pro
DeepSeek Flash is better at quick answers, long documents; Kimi K3.1 Pro is better at writing, coding, reasoning, maths, translation. DeepSeek Flash is the cheaper of the two on output.
Measured quality by task
| Task | DeepSeek Flash | Kimi K3.1 Pro | Better |
|---|---|---|---|
| Quick answers | 91/100 | 91/100 | DeepSeek Flash |
| Writing | 87/100 | 92/100 | Kimi K3.1 Pro |
| Coding | 85/100 | 89/100 | Kimi K3.1 Pro |
| Reasoning | 80/100 | 85/100 | Kimi K3.1 Pro |
| Maths | 78/100 | 81/100 | Kimi K3.1 Pro |
| Structured data | 92/100 | 92/100 | Tie |
| Long documents | 91/100 | 90/100 | DeepSeek Flash |
| Translation | 90/100 | 91/100 | Kimi K3.1 Pro |
Quality is Nivana’s measured score for each kind of task, from weekly pairwise evals judged by models from several labs. Prices are live AI Gateway list prices per million tokens. Updated 2026-11-01. How this is measured.
Price and context
| DeepSeek Flash | Kimi K3.1 Pro | |
|---|---|---|
| Lab | DeepSeek | Moonshot |
| Input per 1M tokens | $0.3 | $2 |
| Output per 1M tokens | $1.2 | $10 |
| Typical chat answer | $0.0013 | $0.010 |
| Context window | 1.05M | 1.05M |
| Router picks it for | Fallback only | Fallback only |
Which should you use?
Use the one that wins the kind of work you do most, unless the price gap outweighs the quality gap for easy requests. Or don’t choose: Nivana scores both, and the rest of the pool, on every request and sends it to whichever is best for that request.
Questions
Is DeepSeek Flash better than Kimi K3.1 Pro?
On Nivana’s weekly evals DeepSeek Flash scores higher on 2 of 8 task types (quick answers, long documents) and Kimi K3.1 Pro on 5 (writing, coding, reasoning, maths, translation). Neither is better at everything.
Which is better for coding, DeepSeek Flash or Kimi K3.1 Pro?
Kimi K3.1 Pro: 89/100 against 85/100 for DeepSeek Flash on Nivana’s coding evals.
Which is better for writing, DeepSeek Flash or Kimi K3.1 Pro?
Kimi K3.1 Pro: 92/100 against 87/100 for DeepSeek Flash on Nivana’s writing evals.
Which is cheaper, DeepSeek Flash or Kimi K3.1 Pro?
DeepSeek Flash: $1.2 per million output tokens against $10 for Kimi K3.1 Pro, about 8.3× less. A typical chat answer costs about $0.0013 on DeepSeek Flash and $0.010 on Kimi K3.1 Pro.