# DeepSeek V4 Flash vs Qwen2.5 Plus 1127

> DeepSeek V4 Flash is the stronger model overall, scoring 53.6 to 38.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/deepseek-v4-flash-vs-qwen2-5-plus
- Last updated: 2026-10-10
- Shared benchmarks: 14

## Summary

- They share 14 benchmarks with published results for both. DeepSeek V4 Flash scores higher in 8 categories and Qwen2.5 Plus 1127 in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where DeepSeek V4 Flash leads 53.7 to 25.9.
- DeepSeek V4 Flash has downloadable open weights; the other is API-only.

## Snapshot

| | DeepSeek V4 Flash | Qwen2.5 Plus 1127 |
|---|---|---|
| Provider | DeepSeek | Alibaba (Qwen) |
| Noometry Index | 53.6 | 38.8 |
| Rank | 35 | 181 |
| Context | 1M | — |
| Input $/M | $0.15 | — |
| Output $/M | $0.60 | — |
| Weights | Open | Proprietary |

## Coding

- DeepSeek V4 Flash: 47.9 (#59)
- Qwen2.5 Plus 1127: 38.5 (#175)

| Benchmark | DeepSeek V4 Flash | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Coding | 1457 | 1314 |
| FrontierCode | 18.8% | — |
| LMArena WebDev | 1582 | — |
| SciCode | 49.9% | — |
| WeirdML | 63% | — |
| ALE-Bench | 1,306 | — |

## Reasoning

- DeepSeek V4 Flash: 53.7 (#30)
- Qwen2.5 Plus 1127: 25.9 (#141)

| Benchmark | DeepSeek V4 Flash | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Hard Prompts | 1444 | 1299 |
| ARC-AGI-2 | 61.4% | — |
| SimpleBench | 61.1% | — |
| Kagi LLM Benchmark | 52.2% | — |
| NYT Connections (extended) | 89.6% | — |
| ARC-AGI-1 | 89% | — |
| CritPt | 16.6% | — |
| Chess Puzzles | 33% | — |
| Mystery Game Puzzles | 34% | — |
| DTBench | 90.9% | — |
| LMCA | 41.7% | — |
| Epoch Capabilities Index | 154.49 | — |

## Math

- DeepSeek V4 Flash: 60.3 (#37)
- Qwen2.5 Plus 1127: 36.1 (#174)

| Benchmark | DeepSeek V4 Flash | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Math | 1427 | 1298 |
| FrontierMath (Tiers 1-3) | 57.5% | — |
| FrontierMath Tier 4 | 24.4% | — |
| MathArena Final-Answer Competitions | 76.5% | — |
| OTIS Mock AIME 2024-2025 | 94.4% | — |
| ProofBench | 56% | — |

## Knowledge

- DeepSeek V4 Flash: 55.4 (#48)
- Qwen2.5 Plus 1127: 35.5 (#183)

| Benchmark | DeepSeek V4 Flash | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Expert | 1441 | 1289 |
| GPQA Diamond | 91% | — |
| SimpleQA Verified | 33.6% | — |

## Multilingual

- DeepSeek V4 Flash: 53.0 (#72)
- Qwen2.5 Plus 1127: 41.9 (#201)

| Benchmark | DeepSeek V4 Flash | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Non-English | 1420 | 1265 |
| LMArena Chinese | 1468 | 1314 |
| LMArena German | 1418 | 1231 |
| LMArena Japanese | 1406 | 1207 |
| LMArena Russian | 1428 | 1271 |
| LMArena French | 1439 | — |
| LMArena Korean | 1384 | — |
| LMArena Spanish | 1436 | — |

## Instruction Following

- DeepSeek V4 Flash: 74.9 (#81)
- Qwen2.5 Plus 1127: 67.2 (#199)

| Benchmark | DeepSeek V4 Flash | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Instruction Following | 1421 | 1275 |

## Long Context

- DeepSeek V4 Flash: 43.8 (#85)
- Qwen2.5 Plus 1127: 39.2 (#184)

| Benchmark | DeepSeek V4 Flash | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Longer Query | 1434 | 1292 |

## Writing & Preference

- DeepSeek V4 Flash: 63.8 (#61)
- Qwen2.5 Plus 1127: 49.4 (#192)

| Benchmark | DeepSeek V4 Flash | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Text | 1432 | 1299 |
| LMArena Creative Writing | 1403 | 1262 |
| LMArena Multi-Turn | 1449 | 1299 |
| EQ-Bench Creative Writing | 1559 | — |

## FAQ

### Is DeepSeek V4 Flash better than Qwen2.5 Plus 1127?

DeepSeek V4 Flash is the stronger model overall, scoring 53.6 to 38.8 on the Noometry Index.

### Is DeepSeek V4 Flash or Qwen2.5 Plus 1127 better for coding?

DeepSeek V4 Flash scores higher on coding benchmarks: 47.9 versus 38.5 in the Noometry coding category.

### How many benchmarks do DeepSeek V4 Flash and Qwen2.5 Plus 1127 share?

14 benchmarks have published results for both models. DeepSeek V4 Flash has 41 scored results on Noometry and Qwen2.5 Plus 1127 has 14.