# Gemini 3.5 Flash vs Grok 3

> Gemini 3.5 Flash is the stronger model overall, scoring 54.1 to 39.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-3-5-flash-vs-grok-3
- Last updated: 2026-10-10
- Shared benchmarks: 26

## Summary

- They share 26 benchmarks with published results for both. Gemini 3.5 Flash scores higher in 8 categories and Grok 3 in 1 category; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.5 Flash leads 62.7 to 13.8.
- The biggest single-benchmark swing is ARC-AGI-1: 92.5% for Gemini 3.5 Flash and 5.5% for Grok 3.

## Snapshot

| | Gemini 3.5 Flash | Grok 3 |
|---|---|---|
| Provider | Google | xAI |
| Noometry Index | 54.1 | 39.6 |
| Rank | 29 | 150 |
| Context | 1.05M | — |
| Input $/M | $1.50 | — |
| Output $/M | $9 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 3.5 Flash: 49.1 (#46)
- Grok 3: 41.5 (#113)

| Benchmark | Gemini 3.5 Flash | Grok 3 |
|---|---|---|
| WeirdML | 62.6% | 37.2% |
| LMArena Coding | 1492 | 1432 |
| SWE-bench Verified | 79.3% | — |
| DeepSWE | 37.4% | — |
| Aider Polyglot | — | 53.3% |
| LMArena WebDev | 1499 | — |
| SciCode | 53.1% | — |
| ALE-Bench | 911.02 | — |

## Agentic & Tool Use

- Gemini 3.5 Flash: 24.8 (#107)
- Grok 3: 30.2 (#69)

| Benchmark | Gemini 3.5 Flash | Grok 3 |
|---|---|---|
| APEX-Agents | 27.5% | — |
| BALROG | — | 29.5% |
| GBAEval | 6.7% | — |
| GDP.pdf | 14% | — |
| Vending-Bench 2 | 5,396 | — |

## Reasoning

- Gemini 3.5 Flash: 62.7 (#16)
- Grok 3: 13.8 (#322)

| Benchmark | Gemini 3.5 Flash | Grok 3 |
|---|---|---|
| ARC-AGI-2 | 72.1% | 0% |
| SimpleBench | 76.7% | 36.1% |
| ARC-AGI-1 | 92.5% | 5.5% |
| LMArena Hard Prompts | 1488 | 1433 |
| Epoch Capabilities Index | 154.55 | 138.34 |
| Kagi LLM Benchmark | — | 61.3% |
| NYT Connections (extended) | 92.6% | — |
| CritPt | 13.1% | — |
| Chess Puzzles | 50% | — |
| EnigmaEval | 25.4% | — |
| EBR-Bench | 4.8% | — |
| Mystery Game Puzzles | 32% | — |
| DTBench | 94.7% | — |
| LMCA | 47.1% | — |
| Surface Evolver Bench | 58.1% | — |
| ForecastBench | 59 | — |

## Math

- Gemini 3.5 Flash: 60.5 (#30)
- Grok 3: 36.2 (#122)

| Benchmark | Gemini 3.5 Flash | Grok 3 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 95.6% | 55.6% |
| LMArena Math | 1502 | 1390 |
| FrontierMath (Feb 2025 set) | 39% | 3.8% |
| FrontierMath Tier 4 (v1) | 14.6% | 0% |
| FrontierMath (Tiers 1-3) | 62.8% | — |
| FrontierMath Tier 4 | 26.8% | — |
| MathArena Final-Answer Competitions | 76.3% | — |
| ProofBench | 31% | — |
| Omni-MATH | — | 46.4% |
| MATH Level 5 | — | 88.7% |

## Knowledge

- Gemini 3.5 Flash: 66.3 (#10)
- Grok 3: 46.0 (#76)

| Benchmark | Gemini 3.5 Flash | Grok 3 |
|---|---|---|
| GPQA Diamond | 92.8% | 75.8% |
| LMArena Expert | 1493 | 1420 |
| SimpleQA Verified | 66.2% | — |
| MMLU-Pro | — | 78.8% |
| Confabulations | — | 14.2% |
| Vectara Hallucination Rate | — | 5.8% |
| GPQA (HELM) | — | 65% |

## Multimodal

- Gemini 3.5 Flash: 45.7 (#13)
- Grok 3: —

| Benchmark | Gemini 3.5 Flash | Grok 3 |
|---|---|---|
| LMArena Vision | 1311 | — |
| Blueprint-Bench 2 | 33.6% | — |
| LMArena Document | 1463 | — |

## Multilingual

- Gemini 3.5 Flash: 57.1 (#12)
- Grok 3: 52.5 (#81)

| Benchmark | Gemini 3.5 Flash | Grok 3 |
|---|---|---|
| LMArena Non-English | 1475 | 1411 |
| LMArena Chinese | 1525 | 1448 |
| LMArena French | 1490 | 1460 |
| LMArena German | 1500 | 1431 |
| LMArena Japanese | 1481 | 1389 |
| LMArena Korean | 1453 | 1374 |
| LMArena Russian | 1491 | 1416 |
| LMArena Spanish | 1478 | 1417 |

## Instruction Following

- Gemini 3.5 Flash: 77.2 (#29)
- Grok 3: 75.2 (#69)

| Benchmark | Gemini 3.5 Flash | Grok 3 |
|---|---|---|
| LMArena Instruction Following | 1466 | 1409 |
| IFEval | — | 88.4% |

## Long Context

- Gemini 3.5 Flash: 45.3 (#39)
- Grok 3: 38.7 (#187)

| Benchmark | Gemini 3.5 Flash | Grok 3 |
|---|---|---|
| LMArena Longer Query | 1481 | 1439 |
| Fiction.LiveBench | — | 58.3% |

## Writing & Preference

- Gemini 3.5 Flash: 65.5 (#46)
- Grok 3: 56.0 (#136)

| Benchmark | Gemini 3.5 Flash | Grok 3 |
|---|---|---|
| LMArena Text | 1481 | 1426 |
| LMArena Creative Writing | 1467 | 1414 |
| LMArena Multi-Turn | 1482 | 1424 |
| Short-Story Creative Writing | — | 76.4% |
| EQ-Bench Creative Writing | — | 1186 |
| WildBench | — | 84.9% |
| EQ-Bench 4 | 1087 | — |

## FAQ

### Is Gemini 3.5 Flash better than Grok 3?

Gemini 3.5 Flash is the stronger model overall, scoring 54.1 to 39.6 on the Noometry Index.

### Is Gemini 3.5 Flash or Grok 3 better for coding?

Gemini 3.5 Flash scores higher on coding benchmarks: 49.1 versus 41.5 in the Noometry coding category.

### How many benchmarks do Gemini 3.5 Flash and Grok 3 share?

26 benchmarks have published results for both models. Gemini 3.5 Flash has 54 scored results on Noometry and Grok 3 has 40.