# Gemini 3.8 Flash vs Grok 4

> Gemini 3.8 Flash is the stronger model overall, scoring 61.8 to 48.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-3-8-flash-vs-grok-4
- Last updated: 2026-10-10
- Shared benchmarks: 25

## Summary

- They share 25 benchmarks with published results for both. Gemini 3.8 Flash scores higher in 8 categories and Grok 4 in 2 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.8 Flash leads 76.9 to 36.7.
- The biggest single-benchmark swing is ARC-AGI-2: 89.2% for Gemini 3.8 Flash and 16% for Grok 4.

## Snapshot

| | Gemini 3.8 Flash | Grok 4 |
|---|---|---|
| Provider | Google | xAI |
| Noometry Index | 61.8 | 48.1 |
| Rank | 11 | 56 |
| Context | 1.05M | — |
| Input $/M | $0.75 | — |
| Output $/M | $3.75 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 3.8 Flash: 59.2 (#15)
- Grok 4: 50.3 (#46)

| Benchmark | Gemini 3.8 Flash | Grok 4 |
|---|---|---|
| WeirdML | 84.8% | 45.7% |
| LMArena Coding | 1510 | 1408 |
| DeepSWE | 73.8% | — |
| FrontierCode | 41.2% | — |
| Aider Polyglot | — | 79.6% |
| CursorBench | 39.6% | — |
| LMArena WebDev | 1584 | — |
| FrontierSWE | 19.6% | — |
| SciCode | 56.6% | — |
| ALE-Bench | 1,270 | — |

## Agentic & Tool Use

- Gemini 3.8 Flash: 41.8 (#21)
- Grok 4: 32.3 (#68)

| Benchmark | Gemini 3.8 Flash | Grok 4 |
|---|---|---|
| Terminal-Bench | — | 27.2% |
| APEX-Agents | 64.3% | — |
| Berkeley Function Calling Leaderboard | — | 63% |
| GDPval | — | 21.1% |
| Remote Labor Index | 5.8% | — |
| Cybench | — | 43% |
| DeepResearch Bench | — | 47.3% |
| BALROG | — | 43.6% |
| GDP.pdf | 23.4% | — |
| LMArena Search | — | 1142 |
| METR Time Horizons | — | 66.6% |
| Vending-Bench 2 | 5,094 | — |

## Reasoning

- Gemini 3.8 Flash: 76.9 (#5)
- Grok 4: 36.7 (#65)

| Benchmark | Gemini 3.8 Flash | Grok 4 |
|---|---|---|
| ARC-AGI-2 | 89.2% | 16% |
| ARC-AGI-1 | 98.5% | 66.7% |
| Chess Puzzles | 61% | 28% |
| LMArena Hard Prompts | 1508 | 1409 |
| Epoch Capabilities Index | 156.71 | 146.44 |
| SimpleBench | — | 60.5% |
| Kagi LLM Benchmark | — | 73.6% |
| NYT Connections (extended) | 97.4% | — |
| CritPt | 18.3% | — |
| Mystery Game Puzzles | 47% | — |
| DTBench | 95.7% | — |
| LMCA | 52.9% | — |
| Surface Evolver Bench | 76.9% | — |
| ForecastBench | — | 60.9 |

## Math

- Gemini 3.8 Flash: 65.3 (#28)
- Grok 4: 48.4 (#64)

| Benchmark | Gemini 3.8 Flash | Grok 4 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 98.9% | 84% |
| LMArena Math | 1528 | 1422 |
| FrontierMath (Tiers 1-3) | 68.4% | — |
| FrontierMath Tier 4 | 22% | — |
| ProofBench | 48% | — |
| Omni-MATH | — | 60.3% |
| FrontierMath (Feb 2025 set) | — | 19.7% |
| FrontierMath Tier 4 (v1) | — | 2.1% |

## Knowledge

- Gemini 3.8 Flash: 74.8 (#2)
- Grok 4: 53.8 (#55)

| Benchmark | Gemini 3.8 Flash | Grok 4 |
|---|---|---|
| GPQA Diamond | 95.4% | 87% |
| LMArena Expert | 1524 | 1415 |
| Humanity's Last Exam | 44.5% | — |
| SimpleQA Verified | 69.7% | — |
| MMLU-Pro | — | 85.1% |
| Confabulations | — | 12.4% |
| GPQA (HELM) | — | 72.7% |

## Multimodal

- Gemini 3.8 Flash: 40.7 (#45)
- Grok 4: 33.7 (#94)

| Benchmark | Gemini 3.8 Flash | Grok 4 |
|---|---|---|
| LMArena Vision | 1314 | 1210 |
| GeoBench | — | 45% |
| Blueprint-Bench 2 | 38.6% | — |
| Furniture Assembly | 31.7% | — |

## Multilingual

- Gemini 3.8 Flash: 58.0 (#5)
- Grok 4: 51.8 (#103)

| Benchmark | Gemini 3.8 Flash | Grok 4 |
|---|---|---|
| LMArena Non-English | 1491 | 1403 |
| LMArena Chinese | 1554 | 1427 |
| LMArena French | 1498 | 1418 |
| LMArena German | 1493 | 1429 |
| LMArena Japanese | 1502 | 1394 |
| LMArena Korean | 1459 | 1377 |
| LMArena Russian | 1515 | 1410 |
| LMArena Spanish | 1485 | 1420 |

## Instruction Following

- Gemini 3.8 Flash: 78.0 (#13)
- Grok 4: 79.2 (#5)

| Benchmark | Gemini 3.8 Flash | Grok 4 |
|---|---|---|
| LMArena Instruction Following | 1490 | 1387 |
| IFEval | — | 94.9% |

## Long Context

- Gemini 3.8 Flash: 46.3 (#24)
- Grok 4: 63.1 (#4)

| Benchmark | Gemini 3.8 Flash | Grok 4 |
|---|---|---|
| LMArena Longer Query | 1508 | 1409 |
| Fiction.LiveBench | — | 94.4% |

## Writing & Preference

- Gemini 3.8 Flash: 72.2 (#15)
- Grok 4: 58.5 (#116)

| Benchmark | Gemini 3.8 Flash | Grok 4 |
|---|---|---|
| LMArena Text | 1499 | 1411 |
| LMArena Creative Writing | 1492 | 1397 |
| LMArena Multi-Turn | 1501 | 1416 |
| Short-Story Creative Writing | — | 76.9% |
| EQ-Bench Creative Writing | 1748 | — |
| WildBench | — | 79.7% |

## FAQ

### Is Gemini 3.8 Flash better than Grok 4?

Gemini 3.8 Flash is the stronger model overall, scoring 61.8 to 48.1 on the Noometry Index.

### Is Gemini 3.8 Flash or Grok 4 better for coding?

Gemini 3.8 Flash scores higher on coding benchmarks: 59.2 versus 50.3 in the Noometry coding category.

### How many benchmarks do Gemini 3.8 Flash and Grok 4 share?

25 benchmarks have published results for both models. Gemini 3.8 Flash has 50 scored results on Noometry and Grok 4 has 48.