# Gemini 3 Flash Preview vs Grok 3

> Gemini 3 Flash Preview is the stronger model overall, scoring 52.3 to 39.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-3-flash-preview-vs-grok-3
- Last updated: 2026-10-10
- Shared benchmarks: 28

## Summary

- They share 28 benchmarks with published results for both. Gemini 3 Flash Preview scores higher in 9 categories and Grok 3 in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3 Flash Preview leads 49.2 to 13.8.
- The biggest single-benchmark swing is ARC-AGI-1: 84.7% for Gemini 3 Flash Preview and 5.5% for Grok 3.

## Snapshot

| | Gemini 3 Flash Preview | Grok 3 |
|---|---|---|
| Provider | Google | xAI |
| Noometry Index | 52.3 | 39.6 |
| Rank | 33 | 150 |
| Context | 1.05M | — |
| Input $/M | $0.50 | — |
| Output $/M | $3 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 3 Flash Preview: 51.5 (#35)
- Grok 3: 41.5 (#113)

| Benchmark | Gemini 3 Flash Preview | Grok 3 |
|---|---|---|
| WeirdML | 61.6% | 37.2% |
| LMArena Coding | 1460 | 1432 |
| SWE-bench Verified | 75.4% | — |
| SWE-bench Verified (bash only) | 75.8% | — |
| Aider Polyglot | — | 53.3% |
| LMArena WebDev | 1439 | — |
| SWE-bench Multilingual | 72.7% | — |
| GSO | 9.8% | — |
| ALE-Bench | 1,367 | — |

## Agentic & Tool Use

- Gemini 3 Flash Preview: 38.6 (#27)
- Grok 3: 30.2 (#69)

| Benchmark | Gemini 3 Flash Preview | Grok 3 |
|---|---|---|
| BALROG | 48.1% | 29.5% |
| Terminal-Bench | 64.3% | — |
| τ²-bench Airline | 82.5% | — |
| τ²-bench Banking | 27.3% | — |
| τ²-bench Retail | 76.8% | — |
| τ²-bench Telecom | 91.2% | — |
| DeepResearch Bench | 49.8% | — |
| GDP.pdf | 10% | — |
| LMArena Search | 1198 | — |
| Vending-Bench 2 | 3,635 | — |

## Reasoning

- Gemini 3 Flash Preview: 49.2 (#35)
- Grok 3: 13.8 (#322)

| Benchmark | Gemini 3 Flash Preview | Grok 3 |
|---|---|---|
| ARC-AGI-2 | 33.6% | 0% |
| SimpleBench | 61.1% | 36.1% |
| ARC-AGI-1 | 84.7% | 5.5% |
| LMArena Hard Prompts | 1465 | 1433 |
| Epoch Capabilities Index | 151.83 | 138.34 |
| Kagi LLM Benchmark | — | 61.3% |
| NYT Connections (extended) | 83.1% | — |
| Chess Puzzles | 40% | — |
| Mystery Game Puzzles | 26% | — |
| DTBench | 89.1% | — |
| LMCA | 43.1% | — |
| ForecastBench | 58.5 | — |

## Math

- Gemini 3 Flash Preview: 51.4 (#42)
- Grok 3: 36.2 (#122)

| Benchmark | Gemini 3 Flash Preview | Grok 3 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 95.6% | 55.6% |
| LMArena Math | 1472 | 1390 |
| FrontierMath (Feb 2025 set) | 35.6% | 3.8% |
| FrontierMath Tier 4 (v1) | 4.2% | 0% |
| FrontierMath (Tiers 1-3) | 51.2% | — |
| FrontierMath Tier 4 | 17.1% | — |
| MathArena Final-Answer Competitions | 67.6% | — |
| ProofBench | 15% | — |
| Omni-MATH | — | 46.4% |
| MATH Level 5 | — | 88.7% |

## Knowledge

- Gemini 3 Flash Preview: 58.8 (#30)
- Grok 3: 46.0 (#76)

| Benchmark | Gemini 3 Flash Preview | Grok 3 |
|---|---|---|
| GPQA Diamond | 89.4% | 75.8% |
| Vectara Hallucination Rate | 13.5% | 5.8% |
| LMArena Expert | 1461 | 1420 |
| SimpleQA Verified | 66.8% | — |
| MMLU-Pro | — | 78.8% |
| Confabulations | — | 14.2% |
| GPQA (HELM) | — | 65% |

## Multimodal

- Gemini 3 Flash Preview: 45.3 (#15)
- Grok 3: —

| Benchmark | Gemini 3 Flash Preview | Grok 3 |
|---|---|---|
| LMArena Vision | 1285 | — |
| GeoBench | 88% | — |
| VPCT | 72.6% | — |
| Blueprint-Bench 2 | 0% | — |
| LMArena Document | 1413 | — |

## Multilingual

- Gemini 3 Flash Preview: 55.9 (#26)
- Grok 3: 52.5 (#81)

| Benchmark | Gemini 3 Flash Preview | Grok 3 |
|---|---|---|
| LMArena Non-English | 1458 | 1411 |
| LMArena Chinese | 1510 | 1448 |
| LMArena French | 1478 | 1460 |
| LMArena German | 1497 | 1431 |
| LMArena Japanese | 1488 | 1389 |
| LMArena Korean | 1443 | 1374 |
| LMArena Russian | 1480 | 1416 |
| LMArena Spanish | 1470 | 1417 |

## Instruction Following

- Gemini 3 Flash Preview: 75.8 (#52)
- Grok 3: 75.2 (#69)

| Benchmark | Gemini 3 Flash Preview | Grok 3 |
|---|---|---|
| LMArena Instruction Following | 1437 | 1409 |
| IFEval | — | 88.4% |

## Long Context

- Gemini 3 Flash Preview: 44.4 (#63)
- Grok 3: 38.7 (#187)

| Benchmark | Gemini 3 Flash Preview | Grok 3 |
|---|---|---|
| LMArena Longer Query | 1452 | 1439 |
| Fiction.LiveBench | — | 58.3% |

## Writing & Preference

- Gemini 3 Flash Preview: 65.6 (#44)
- Grok 3: 56.0 (#136)

| Benchmark | Gemini 3 Flash Preview | Grok 3 |
|---|---|---|
| LMArena Text | 1466 | 1426 |
| LMArena Creative Writing | 1457 | 1414 |
| LMArena Multi-Turn | 1471 | 1424 |
| Short-Story Creative Writing | — | 76.4% |
| EQ-Bench Creative Writing | — | 1186 |
| WildBench | — | 84.9% |

## FAQ

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

Gemini 3 Flash Preview is the stronger model overall, scoring 52.3 to 39.6 on the Noometry Index.

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

Gemini 3 Flash Preview scores higher on coding benchmarks: 51.5 versus 41.5 in the Noometry coding category.

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

28 benchmarks have published results for both models. Gemini 3 Flash Preview has 59 scored results on Noometry and Grok 3 has 40.