# Gemini 1.5 Flash 8B vs Kimi K2.5

> Kimi K2.5 is the stronger model overall, scoring 47.8 to 29.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-1-5-flash-8b-vs-kimi-k2-5
- Last updated: 2026-10-10
- Shared benchmarks: 20

## Summary

- They share 20 benchmarks with published results for both. Gemini 1.5 Flash 8B scores higher in 0 categories and Kimi K2.5 in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Kimi K2.5 leads 53.6 to 16.0.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 4.6% for Gemini 1.5 Flash 8B and 92.2% for Kimi K2.5.
- Kimi K2.5 has downloadable open weights; the other is API-only.

## Snapshot

| | Gemini 1.5 Flash 8B | Kimi K2.5 |
|---|---|---|
| Provider | Google | Moonshot AI |
| Noometry Index | 29.7 | 47.8 |
| Rank | 292 | 50 |
| Context | — | 262K |
| Input $/M | — | $0.45 |
| Output $/M | — | $2.25 |
| Weights | Proprietary | Open |

## Coding

- Gemini 1.5 Flash 8B: 34.9 (#221)
- Kimi K2.5: 48.7 (#48)

| Benchmark | Gemini 1.5 Flash 8B | Kimi K2.5 |
|---|---|---|
| LMArena Coding | 1218 | 1474 |
| SWE-bench Verified | — | 73.8% |
| SWE-bench Verified (bash only) | — | 70.8% |
| LMArena WebDev | — | 1436 |
| SWE-bench Multilingual | — | 67.3% |
| SciCode | — | 49% |
| WeirdML | — | 45.6% |
| ALE-Bench | — | 821.65 |

## Agentic & Tool Use

- Gemini 1.5 Flash 8B: —
- Kimi K2.5: 34.0 (#44)

| Benchmark | Gemini 1.5 Flash 8B | Kimi K2.5 |
|---|---|---|
| Terminal-Bench | — | 43.2% |
| OSWorld | — | 63.3% |
| Vending-Bench 2 | — | 1,198 |

## Reasoning

- Gemini 1.5 Flash 8B: 19.2 (#242)
- Kimi K2.5: 31.2 (#74)

| Benchmark | Gemini 1.5 Flash 8B | Kimi K2.5 |
|---|---|---|
| LMArena Hard Prompts | 1210 | 1454 |
| ARC-AGI-2 | — | 11.8% |
| SimpleBench | — | 46.8% |
| Kagi LLM Benchmark | — | 78.5% |
| NYT Connections (extended) | — | 69.9% |
| ARC-AGI-1 | — | 65.3% |
| CritPt | — | 3.1% |
| Chess Puzzles | — | 12% |
| EnigmaEval | — | 3.4% |
| Thematic Generalization | — | 69.4% |
| DTBench | 50% | — |
| Epoch Capabilities Index | — | 148.05 |

## Math

- Gemini 1.5 Flash 8B: 13.3 (#296)
- Kimi K2.5: 50.3 (#46)

| Benchmark | Gemini 1.5 Flash 8B | Kimi K2.5 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 4.6% | 92.2% |
| LMArena Math | 1207 | 1470 |
| MathArena Final-Answer Competitions | — | 62.3% |
| FrontierMath (Feb 2025 set) | — | 27.9% |
| FrontierMath Tier 4 (v1) | — | 4.2% |

## Knowledge

- Gemini 1.5 Flash 8B: 16.0 (#285)
- Kimi K2.5: 53.6 (#52)

| Benchmark | Gemini 1.5 Flash 8B | Kimi K2.5 |
|---|---|---|
| GPQA Diamond | 33% | 87.6% |
| LMArena Expert | 1185 | 1466 |
| Humanity's Last Exam | — | 24.4% |
| SimpleQA Verified | — | 34.3% |
| Vectara Hallucination Rate | — | 14.2% |

## Multimodal

- Gemini 1.5 Flash 8B: 27.6 (#110)
- Kimi K2.5: 40.4 (#37)

| Benchmark | Gemini 1.5 Flash 8B | Kimi K2.5 |
|---|---|---|
| LMArena Vision | 1044 | 1269 |
| LMArena Document | — | 1430 |

## Multilingual

- Gemini 1.5 Flash 8B: 38.6 (#224)
- Kimi K2.5: 54.1 (#50)

| Benchmark | Gemini 1.5 Flash 8B | Kimi K2.5 |
|---|---|---|
| LMArena Non-English | 1215 | 1433 |
| LMArena Chinese | 1231 | 1495 |
| LMArena French | 1233 | 1454 |
| LMArena German | 1206 | 1441 |
| LMArena Japanese | 1150 | 1422 |
| LMArena Korean | 1140 | 1412 |
| LMArena Russian | 1236 | 1436 |
| LMArena Spanish | 1212 | 1450 |

## Instruction Following

- Gemini 1.5 Flash 8B: 63.1 (#231)
- Kimi K2.5: 75.5 (#60)

| Benchmark | Gemini 1.5 Flash 8B | Kimi K2.5 |
|---|---|---|
| LMArena Instruction Following | 1199 | 1431 |

## Long Context

- Gemini 1.5 Flash 8B: 36.9 (#220)
- Kimi K2.5: 52.1 (#7)

| Benchmark | Gemini 1.5 Flash 8B | Kimi K2.5 |
|---|---|---|
| LMArena Longer Query | 1219 | 1445 |
| Fiction.LiveBench | — | 86.1% |
| CL-bench | — | 19.3% |
| CL-bench Life | — | 13.2% |

## Writing & Preference

- Gemini 1.5 Flash 8B: 43.0 (#227)
- Kimi K2.5: 65.3 (#51)

| Benchmark | Gemini 1.5 Flash 8B | Kimi K2.5 |
|---|---|---|
| LMArena Text | 1226 | 1445 |
| LMArena Creative Writing | 1218 | 1423 |
| LMArena Multi-Turn | 1185 | 1444 |
| EQ-Bench Creative Writing | — | 1579 |

## FAQ

### Is Gemini 1.5 Flash 8B better than Kimi K2.5?

Kimi K2.5 is the stronger model overall, scoring 47.8 to 29.7 on the Noometry Index.

### Is Gemini 1.5 Flash 8B or Kimi K2.5 better for coding?

Kimi K2.5 scores higher on coding benchmarks: 48.7 versus 34.9 in the Noometry coding category.

### How many benchmarks do Gemini 1.5 Flash 8B and Kimi K2.5 share?

20 benchmarks have published results for both models. Gemini 1.5 Flash 8B has 21 scored results on Noometry and Kimi K2.5 has 51.