Model comparison
DeepSeek V4.1 Flash vs Kimi K2.5 Instant
DeepSeek V4.1 Flash is the stronger model overall, scoring 52.8 to 43.6 on the Noometry Index.
Last verified . 18 shared benchmarks.
DeepSeekSummary
- They share 18 benchmarks with published results for both. DeepSeek V4.1 Flash scores higher in 8 categories and Kimi K2.5 Instant in 1 category; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where DeepSeek V4.1 Flash leads 66.7 to 39.4.
Side by side
| DeepSeek V4.1 Flash | Kimi K2.5 Instant | |
|---|---|---|
| Provider | DeepSeek | Moonshot AI |
| Noometry Index | 52.8 | 43.6 |
| Released | 2026-09-09 | — |
| Weights | Open | Open |
| Context window | 1M | — |
| Max output | 393K | — |
| Input $ / M tokens | $0.15 | — |
| Output $ / M tokens | $0.60 | — |
| Results tracked | 37 | 18 |
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Category by category
Coding DeepSeek V4.1 Flash leads
DeepSeek V4.1 Flash: 52.9 (#32), Kimi K2.5 Instant: 42.6 (#97)
| Benchmark | DeepSeek V4.1 Flash | Kimi K2.5 Instant |
|---|---|---|
| LMArena WebDev | 1619 | 1404 |
| LMArena Coding | 1506 | 1484 |
| SciCode | 51.9% | — |
| ALE-Bench | 1,092 | — |
Agentic & Tool Use Not comparable
DeepSeek V4.1 Flash: 31.2 (#69), Kimi K2.5 Instant: —
| Benchmark | DeepSeek V4.1 Flash | Kimi K2.5 Instant |
|---|---|---|
| APEX-Agents | 39.5% | — |
| GDP.pdf | 19.8% | — |
Reasoning DeepSeek V4.1 Flash leads
DeepSeek V4.1 Flash: 50.2 (#36), Kimi K2.5 Instant: 29.7 (#90)
| Benchmark | DeepSeek V4.1 Flash | Kimi K2.5 Instant |
|---|---|---|
| LMArena Hard Prompts | 1483 | 1443 |
| NYT Connections (extended) | 89.6% | — |
| CritPt | 14.3% | — |
| Mystery Game Puzzles | 43% | — |
| DTBench | 89.9% | — |
| LMCA | 47% | — |
| Surface Evolver Bench | 46.3% | — |
| Epoch Capabilities Index | 154.9 | — |
Math DeepSeek V4.1 Flash leads
DeepSeek V4.1 Flash: 66.7 (#25), Kimi K2.5 Instant: 39.4 (#105)
| Benchmark | DeepSeek V4.1 Flash | Kimi K2.5 Instant |
|---|---|---|
| LMArena Math | 1477 | 1442 |
| FrontierMath (Tiers 1-3) | 67.4% | — |
| FrontierMath Tier 4 | 26.8% | — |
| OTIS Mock AIME 2024-2025 | 98.3% | — |
| ProofBench | 54% | — |
Knowledge DeepSeek V4.1 Flash leads
DeepSeek V4.1 Flash: 57.9 (#38), Kimi K2.5 Instant: 40.2 (#123)
| Benchmark | DeepSeek V4.1 Flash | Kimi K2.5 Instant |
|---|---|---|
| LMArena Expert | 1506 | 1440 |
| GPQA Diamond | 89.8% | — |
Multimodal Kimi K2.5 Instant leads
DeepSeek V4.1 Flash: 39.1 (#61), Kimi K2.5 Instant: 40.2 (#50)
| Benchmark | DeepSeek V4.1 Flash | Kimi K2.5 Instant |
|---|---|---|
| LMArena Vision | 1277 | 1254 |
| Furniture Assembly | 34.2% | — |
Multilingual DeepSeek V4.1 Flash leads
DeepSeek V4.1 Flash: 55.0 (#35), Kimi K2.5 Instant: 52.0 (#94)
| Benchmark | DeepSeek V4.1 Flash | Kimi K2.5 Instant |
|---|---|---|
| LMArena Non-English | 1448 | 1406 |
| LMArena Chinese | 1497 | 1449 |
| LMArena French | 1452 | 1403 |
| LMArena German | 1484 | 1413 |
| LMArena Korean | 1452 | 1378 |
| LMArena Russian | 1471 | 1404 |
| LMArena Spanish | 1459 | 1447 |
| LMArena Japanese | 1412 | — |
Instruction Following DeepSeek V4.1 Flash leads
DeepSeek V4.1 Flash: 77.3 (#26), Kimi K2.5 Instant: 75.3 (#65)
| Benchmark | DeepSeek V4.1 Flash | Kimi K2.5 Instant |
|---|---|---|
| LMArena Instruction Following | 1474 | 1430 |
Long Context DeepSeek V4.1 Flash leads
DeepSeek V4.1 Flash: 45.2 (#47), Kimi K2.5 Instant: 43.9 (#83)
| Benchmark | DeepSeek V4.1 Flash | Kimi K2.5 Instant |
|---|---|---|
| LMArena Longer Query | 1475 | 1435 |
Writing & Preference DeepSeek V4.1 Flash leads
DeepSeek V4.1 Flash: 65.4 (#48), Kimi K2.5 Instant: 60.6 (#95)
| Benchmark | DeepSeek V4.1 Flash | Kimi K2.5 Instant |
|---|---|---|
| LMArena Text | 1462 | 1420 |
| LMArena Creative Writing | 1435 | 1381 |
| LMArena Multi-Turn | 1457 | 1427 |
| EQ-Bench Creative Writing | 1540 | — |
Frequently asked questions
Is DeepSeek V4.1 Flash better than Kimi K2.5 Instant?
DeepSeek V4.1 Flash is the stronger model overall, scoring 52.8 to 43.6 on the Noometry Index.
Is DeepSeek V4.1 Flash or Kimi K2.5 Instant better for coding?
DeepSeek V4.1 Flash scores higher on coding benchmarks: 52.9 versus 42.6 in the Noometry coding category.
How many benchmarks do DeepSeek V4.1 Flash and Kimi K2.5 Instant share?
18 benchmarks have published results for both models. DeepSeek V4.1 Flash has 37 scored results on Noometry and Kimi K2.5 Instant has 18.