# DeepSeek V4.1 Flash vs Kimi K3

> Kimi K3 is the stronger model overall, scoring 59.5 to 52.8 on the Noometry Index. DeepSeek V4.1 Flash costs 23× less per token, which makes it the better buy when Kimi K3's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/deepseek-v4-1-flash-vs-kimi-k3
- Last updated: 2026-10-11
- Shared benchmarks: 36

## Summary

- They share 36 benchmarks with published results for both. DeepSeek V4.1 Flash scores higher in 1 category and Kimi K3 in 9 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Kimi K3 leads 63.0 to 50.2.
- The biggest single-benchmark swing is Surface Evolver Bench: 46.3% for DeepSeek V4.1 Flash and 95% for Kimi K3.
- DeepSeek V4.1 Flash is cheaper at $0.15 / $0.60 per million input/output tokens, against $3 / $15 for Kimi K3.
- Kimi K3 accepts more context: 1.05M tokens versus 1M.

## Snapshot

| | DeepSeek V4.1 Flash | Kimi K3 |
|---|---|---|
| Provider | DeepSeek | Moonshot AI |
| Noometry Index | 52.8 | 59.5 |
| Rank | 38 | 15 |
| Context | 1M | 1.05M |
| Input $/M | $0.15 | $3 |
| Output $/M | $0.60 | $15 |
| Weights | Open | Open |

## Coding

- DeepSeek V4.1 Flash: 52.9 (#32)
- Kimi K3: 61.0 (#10)

| Benchmark | DeepSeek V4.1 Flash | Kimi K3 |
|---|---|---|
| LMArena WebDev | 1619 | 1654 |
| SciCode | 51.9% | 59.5% |
| LMArena Coding | 1506 | 1508 |
| ALE-Bench | 1,092 | 1,524 |
| DeepSWE | — | 68.5% |
| FrontierCode | — | 44.2% |
| FrontierSWE | — | 25.9% |
| WeirdML | — | 82.6% |

## Agentic & Tool Use

- DeepSeek V4.1 Flash: 31.2 (#69)
- Kimi K3: 41.8 (#20)

| Benchmark | DeepSeek V4.1 Flash | Kimi K3 |
|---|---|---|
| APEX-Agents | 39.5% | 50.6% |
| GDP.pdf | 19.8% | 19% |
| τ²-bench Banking | — | 37.1% |
| PostTrainBench | — | 32% |
| GBAEval | — | 48.3% |
| Vending-Bench 2 | — | 5,165 |

## Reasoning

- DeepSeek V4.1 Flash: 50.2 (#36)
- Kimi K3: 63.0 (#17)

| Benchmark | DeepSeek V4.1 Flash | Kimi K3 |
|---|---|---|
| NYT Connections (extended) | 89.6% | 93.6% |
| CritPt | 14.3% | 23.4% |
| LMArena Hard Prompts | 1483 | 1496 |
| Mystery Game Puzzles | 43% | 26% |
| DTBench | 89.9% | 91.2% |
| LMCA | 47% | 52.7% |
| Surface Evolver Bench | 46.3% | 95% |
| Epoch Capabilities Index | 154.9 | 157.45 |
| ARC-AGI-2 | — | 60.4% |
| SimpleBench | — | 60.7% |
| ARC-AGI-1 | — | 94.5% |
| Chess Puzzles | — | 39% |
| ForecastBench | — | 61.1 |

## Math

- DeepSeek V4.1 Flash: 66.7 (#25)
- Kimi K3: 74.2 (#16)

| Benchmark | DeepSeek V4.1 Flash | Kimi K3 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 67.4% | 72.2% |
| FrontierMath Tier 4 | 26.8% | 39% |
| OTIS Mock AIME 2024-2025 | 98.3% | 97.2% |
| ProofBench | 54% | 87% |
| LMArena Math | 1477 | 1491 |
| MathArena Final-Answer Competitions | — | 87.8% |

## Knowledge

- DeepSeek V4.1 Flash: 57.9 (#38)
- Kimi K3: 63.2 (#21)

| Benchmark | DeepSeek V4.1 Flash | Kimi K3 |
|---|---|---|
| GPQA Diamond | 89.8% | 93.1% |
| LMArena Expert | 1506 | 1521 |
| SimpleQA Verified | — | 50.6% |

## Multimodal

- DeepSeek V4.1 Flash: 39.1 (#61)
- Kimi K3: 37.8 (#70)

| Benchmark | DeepSeek V4.1 Flash | Kimi K3 |
|---|---|---|
| Furniture Assembly | 34.2% | 34.2% |
| LMArena Vision | 1277 | — |
| Blueprint-Bench 2 | — | 29.5% |

## Multilingual

- DeepSeek V4.1 Flash: 55.0 (#35)
- Kimi K3: 56.3 (#21)

| Benchmark | DeepSeek V4.1 Flash | Kimi K3 |
|---|---|---|
| LMArena Non-English | 1448 | 1466 |
| LMArena Chinese | 1497 | 1529 |
| LMArena French | 1452 | 1491 |
| LMArena German | 1484 | 1488 |
| LMArena Japanese | 1412 | 1487 |
| LMArena Korean | 1452 | 1458 |
| LMArena Russian | 1471 | 1482 |
| LMArena Spanish | 1459 | 1472 |

## Instruction Following

- DeepSeek V4.1 Flash: 77.3 (#26)
- Kimi K3: 77.7 (#14)

| Benchmark | DeepSeek V4.1 Flash | Kimi K3 |
|---|---|---|
| LMArena Instruction Following | 1474 | 1483 |

## Long Context

- DeepSeek V4.1 Flash: 45.2 (#47)
- Kimi K3: 45.8 (#29)

| Benchmark | DeepSeek V4.1 Flash | Kimi K3 |
|---|---|---|
| LMArena Longer Query | 1475 | 1494 |

## Writing & Preference

- DeepSeek V4.1 Flash: 65.4 (#48)
- Kimi K3: 76.6 (#4)

| Benchmark | DeepSeek V4.1 Flash | Kimi K3 |
|---|---|---|
| LMArena Text | 1462 | 1476 |
| LMArena Creative Writing | 1435 | 1454 |
| EQ-Bench Creative Writing | 1540 | 2082 |
| LMArena Multi-Turn | 1457 | 1488 |
| EQ-Bench 4 | — | 1339 |

## FAQ

### Is DeepSeek V4.1 Flash better than Kimi K3?

Kimi K3 is the stronger model overall, scoring 59.5 to 52.8 on the Noometry Index. DeepSeek V4.1 Flash costs 23× less per token, which makes it the better buy when Kimi K3's lead doesn't matter for your workload.

### Which is cheaper, DeepSeek V4.1 Flash or Kimi K3?

DeepSeek V4.1 Flash is cheaper. It lists at $0.15 per million input tokens and $0.60 per million output tokens; Kimi K3 lists at $3 and $15.

### Is DeepSeek V4.1 Flash or Kimi K3 better for coding?

Kimi K3 scores higher on coding benchmarks: 61.0 versus 52.9 in the Noometry coding category.

### Which has the bigger context window?

Kimi K3 does, with 1.05M tokens against 1M.

### How many benchmarks do DeepSeek V4.1 Flash and Kimi K3 share?

36 benchmarks have published results for both models. DeepSeek V4.1 Flash has 37 scored results on Noometry and Kimi K3 has 53.