# Gemini 3.6 Flash vs Grok 4 Fast

> Gemini 3.6 Flash is the stronger model overall, scoring 54.1 to 39.0 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-3-6-flash-vs-grok-4-fast
- Last updated: 2026-10-10
- Shared benchmarks: 23

## Summary

- They share 23 benchmarks with published results for both. Gemini 3.6 Flash scores higher in 8 categories and Grok 4 Fast in 1 category; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.6 Flash leads 58.9 to 22.5.
- The biggest single-benchmark swing is ARC-AGI-2: 60.4% for Gemini 3.6 Flash and 5.3% for Grok 4 Fast.

## Snapshot

| | Gemini 3.6 Flash | Grok 4 Fast |
|---|---|---|
| Provider | Google | xAI |
| Noometry Index | 54.1 | 39.0 |
| Rank | 30 | 164 |
| Context | 1.05M | — |
| Input $/M | $0.75 | — |
| Output $/M | $3.75 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 3.6 Flash: 49.6 (#45)
- Grok 4 Fast: 32.3 (#264)

| Benchmark | Gemini 3.6 Flash | Grok 4 Fast |
|---|---|---|
| LMArena WebDev | 1536 | 1160 |
| WeirdML | 56.1% | 42.9% |
| LMArena Coding | 1492 | 1429 |
| DeepSWE | 46.7% | — |
| FrontierCode | 34.4% | — |
| SciCode | 52.7% | — |
| ALE-Bench | 715.52 | — |

## Agentic & Tool Use

- Gemini 3.6 Flash: 32.4 (#56)
- Grok 4 Fast: 29.3 (#80)

| Benchmark | Gemini 3.6 Flash | Grok 4 Fast |
|---|---|---|
| APEX-Agents | 46.9% | — |
| τ²-bench Banking | — | 15.7% |
| Cybench | — | 30% |
| GDP.pdf | 14% | — |
| LMArena Search | — | 1171 |

## Reasoning

- Gemini 3.6 Flash: 58.9 (#20)
- Grok 4 Fast: 22.5 (#179)

| Benchmark | Gemini 3.6 Flash | Grok 4 Fast |
|---|---|---|
| ARC-AGI-2 | 60.4% | 5.3% |
| ARC-AGI-1 | 91.2% | 48.5% |
| LMArena Hard Prompts | 1486 | 1413 |
| DTBench | 95.5% | 82.7% |
| Epoch Capabilities Index | 154.36 | 144.21 |
| Kagi LLM Benchmark | — | 66.1% |
| NYT Connections (extended) | 89% | — |
| CritPt | 10.6% | — |
| Chess Puzzles | 43% | — |
| Mystery Game Puzzles | 30% | — |
| LMCA | 44.9% | — |
| ForecastBench | — | 60.5 |

## Math

- Gemini 3.6 Flash: 57.0 (#33)
- Grok 4 Fast: 36.1 (#126)

| Benchmark | Gemini 3.6 Flash | Grok 4 Fast |
|---|---|---|
| LMArena Math | 1504 | 1419 |
| FrontierMath (Tiers 1-3) | 58.9% | — |
| FrontierMath Tier 4 | 22% | — |
| MathArena Final-Answer Competitions | 70.8% | — |
| OTIS Mock AIME 2024-2025 | 94.2% | — |
| ProofBench | 36% | — |

## Knowledge

- Gemini 3.6 Flash: 67.8 (#7)
- Grok 4 Fast: 31.5 (#211)

| Benchmark | Gemini 3.6 Flash | Grok 4 Fast |
|---|---|---|
| LMArena Expert | 1489 | 1411 |
| GPQA Diamond | 94.1% | — |
| SimpleQA Verified | 66.2% | — |
| Vectara Hallucination Rate | — | 19.7% |

## Multimodal

- Gemini 3.6 Flash: 38.7 (#55)
- Grok 4 Fast: —

| Benchmark | Gemini 3.6 Flash | Grok 4 Fast |
|---|---|---|
| LMArena Vision | 1297 | — |
| Blueprint-Bench 2 | 31.2% | — |
| Furniture Assembly | 23.3% | — |
| LMArena Document | 1456 | — |

## Multilingual

- Gemini 3.6 Flash: 56.8 (#17)
- Grok 4 Fast: 51.5 (#106)

| Benchmark | Gemini 3.6 Flash | Grok 4 Fast |
|---|---|---|
| LMArena Non-English | 1470 | 1397 |
| LMArena Chinese | 1530 | 1458 |
| LMArena French | 1501 | 1433 |
| LMArena German | 1478 | 1383 |
| LMArena Japanese | 1477 | 1358 |
| LMArena Korean | 1435 | 1359 |
| LMArena Russian | 1490 | 1387 |
| LMArena Spanish | 1477 | 1414 |

## Instruction Following

- Gemini 3.6 Flash: 77.2 (#27)
- Grok 4 Fast: 73.4 (#116)

| Benchmark | Gemini 3.6 Flash | Grok 4 Fast |
|---|---|---|
| LMArena Instruction Following | 1467 | 1388 |

## Long Context

- Gemini 3.6 Flash: 45.1 (#47)
- Grok 4 Fast: 63.2 (#3)

| Benchmark | Gemini 3.6 Flash | Grok 4 Fast |
|---|---|---|
| LMArena Longer Query | 1475 | 1415 |
| Fiction.LiveBench | — | 94.4% |

## Writing & Preference

- Gemini 3.6 Flash: 68.3 (#26)
- Grok 4 Fast: 60.2 (#96)

| Benchmark | Gemini 3.6 Flash | Grok 4 Fast |
|---|---|---|
| LMArena Text | 1478 | 1407 |
| LMArena Creative Writing | 1464 | 1388 |
| LMArena Multi-Turn | 1481 | 1414 |
| EQ-Bench Creative Writing | 1604 | — |

## FAQ

### Is Gemini 3.6 Flash better than Grok 4 Fast?

Gemini 3.6 Flash is the stronger model overall, scoring 54.1 to 39.0 on the Noometry Index.

### Is Gemini 3.6 Flash or Grok 4 Fast better for coding?

Gemini 3.6 Flash scores higher on coding benchmarks: 49.6 versus 32.3 in the Noometry coding category.

### How many benchmarks do Gemini 3.6 Flash and Grok 4 Fast share?

23 benchmarks have published results for both models. Gemini 3.6 Flash has 46 scored results on Noometry and Grok 4 Fast has 30.