# DeepSeek V4 Flash vs Kimi K2.5 Instant

> DeepSeek V4 Flash is the stronger model overall, scoring 53.6 to 42.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/deepseek-v4-flash-vs-kimi-k2-5-instant
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. DeepSeek V4 Flash scores higher in 6 categories and Kimi K2.5 Instant in 2 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where DeepSeek V4 Flash leads 53.7 to 28.5.

## Snapshot

| | DeepSeek V4 Flash | Kimi K2.5 Instant |
|---|---|---|
| Provider | DeepSeek | Moonshot AI |
| Noometry Index | 53.6 | 42.9 |
| Rank | 32 | 92 |
| Context | 1M | — |
| Input $/M | $0.15 | — |
| Output $/M | $0.60 | — |
| Weights | Open | Open |

## Coding

- DeepSeek V4 Flash: 47.6 (#56)
- Kimi K2.5 Instant: 42.3 (#95)

| Benchmark | DeepSeek V4 Flash | Kimi K2.5 Instant |
|---|---|---|
| LMArena WebDev | 1581 | 1404 |
| LMArena Coding | 1457 | 1483 |
| FrontierCode | 18.8% | — |
| SciCode | 49.9% | — |
| WeirdML | 63% | — |
| ALE-Bench | 1,306 | — |

## Reasoning

- DeepSeek V4 Flash: 53.7 (#25)
- Kimi K2.5 Instant: 28.5 (#88)

| Benchmark | DeepSeek V4 Flash | Kimi K2.5 Instant |
|---|---|---|
| LMArena Hard Prompts | 1443 | 1443 |
| 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 | 154.51 | — |

## Math

- DeepSeek V4 Flash: 60.0 (#31)
- Kimi K2.5 Instant: 36.6 (#105)

| Benchmark | DeepSeek V4 Flash | Kimi K2.5 Instant |
|---|---|---|
| LMArena Math | 1427 | 1443 |
| 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: 55.5 (#43)
- Kimi K2.5 Instant: 39.5 (#121)

| Benchmark | DeepSeek V4 Flash | Kimi K2.5 Instant |
|---|---|---|
| LMArena Expert | 1441 | 1438 |
| GPQA Diamond | 91% | — |
| SimpleQA Verified | 33.6% | — |

## Multimodal

- DeepSeek V4 Flash: —
- Kimi K2.5 Instant: 39.5 (#47)

| Benchmark | DeepSeek V4 Flash | Kimi K2.5 Instant |
|---|---|---|
| LMArena Vision | — | 1254 |

## Multilingual

- DeepSeek V4 Flash: 53.2 (#71)
- Kimi K2.5 Instant: 52.2 (#89)

| Benchmark | DeepSeek V4 Flash | Kimi K2.5 Instant |
|---|---|---|
| LMArena Non-English | 1420 | 1406 |
| LMArena Chinese | 1467 | 1450 |
| LMArena French | 1438 | 1403 |
| LMArena German | 1418 | 1413 |
| LMArena Korean | 1383 | 1378 |
| LMArena Russian | 1428 | 1404 |
| LMArena Spanish | 1437 | 1448 |
| LMArena Japanese | 1403 | — |

## Instruction Following

- DeepSeek V4 Flash: 75.1 (#76)
- Kimi K2.5 Instant: 75.5 (#61)

| Benchmark | DeepSeek V4 Flash | Kimi K2.5 Instant |
|---|---|---|
| LMArena Instruction Following | 1421 | 1430 |

## Long Context

- DeepSeek V4 Flash: 43.8 (#81)
- Kimi K2.5 Instant: 43.8 (#82)

| Benchmark | DeepSeek V4 Flash | Kimi K2.5 Instant |
|---|---|---|
| LMArena Longer Query | 1435 | 1435 |

## Writing & Preference

- DeepSeek V4 Flash: 64.0 (#59)
- Kimi K2.5 Instant: 60.8 (#91)

| Benchmark | DeepSeek V4 Flash | Kimi K2.5 Instant |
|---|---|---|
| LMArena Text | 1432 | 1420 |
| LMArena Creative Writing | 1403 | 1379 |
| LMArena Multi-Turn | 1449 | 1427 |
| EQ-Bench Creative Writing | 1559 | — |

## FAQ

### Is DeepSeek V4 Flash better than Kimi K2.5 Instant?

DeepSeek V4 Flash is the stronger model overall, scoring 53.6 to 42.9 on the Noometry Index.

### Is DeepSeek V4 Flash or Kimi K2.5 Instant better for coding?

DeepSeek V4 Flash scores higher on coding benchmarks: 47.6 versus 42.3 in the Noometry coding category.

### How many benchmarks do DeepSeek V4 Flash and Kimi K2.5 Instant share?

17 benchmarks have published results for both models. DeepSeek V4 Flash has 41 scored results on Noometry and Kimi K2.5 Instant has 18.