# Gemini 2.5 Flash vs Grok 3

> Gemini 2.5 Flash and Grok 3 score almost the same on the Noometry Index (39.3 vs 39.9), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/gemini-2-5-flash-vs-grok-3
- Last updated: 2026-10-11
- Shared benchmarks: 38

## Summary

- They share 38 benchmarks with published results for both. Gemini 2.5 Flash scores higher in 5 categories and Grok 3 in 4 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Grok 3 leads 46.2 to 36.4.
- The biggest single-benchmark swing is ARC-AGI-1: 33.3% for Gemini 2.5 Flash and 5.5% for Grok 3.

## Snapshot

| | Gemini 2.5 Flash | Grok 3 |
|---|---|---|
| Provider | Google | xAI |
| Noometry Index | 39.3 | 39.9 |
| Rank | 170 | 157 |
| Context | 1.05M | — |
| Input $/M | $0.30 | — |
| Output $/M | $2.50 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 2.5 Flash: 35.8 (#220)
- Grok 3: 41.9 (#115)

| Benchmark | Gemini 2.5 Flash | Grok 3 |
|---|---|---|
| Aider Polyglot | 55.1% | 53.3% |
| WeirdML | 41.9% | 37.2% |
| LMArena Coding | 1424 | 1432 |
| SWE-bench Verified (bash only) | 28.7% | — |
| ALE-Bench | 661.88 | — |

## Agentic & Tool Use

- Gemini 2.5 Flash: 30.8 (#74)
- Grok 3: 30.5 (#76)

| Benchmark | Gemini 2.5 Flash | Grok 3 |
|---|---|---|
| BALROG | 33.5% | 29.5% |
| Terminal-Bench | 17.1% | — |
| Berkeley Function Calling Leaderboard | 56.2% | — |
| TheAgentCompany | 41.1% | — |
| Vending-Bench 2 | 548.84 | — |

## Reasoning

- Gemini 2.5 Flash: 18.1 (#286)
- Grok 3: 13.7 (#333)

| Benchmark | Gemini 2.5 Flash | Grok 3 |
|---|---|---|
| ARC-AGI-2 | 2.5% | 0% |
| SimpleBench | 41.2% | 36.1% |
| Kagi LLM Benchmark | 56.8% | 61.3% |
| ARC-AGI-1 | 33.3% | 5.5% |
| LMArena Hard Prompts | 1422 | 1434 |
| Epoch Capabilities Index | 143.03 | 138.33 |
| CritPt | 1.1% | — |
| EnigmaEval | 2.7% | — |
| DTBench | 76.5% | — |
| LMCA | 27.5% | — |
| ForecastBench | 60.6 | — |

## Math

- Gemini 2.5 Flash: 39.9 (#98)
- Grok 3: 38.0 (#145)

| Benchmark | Gemini 2.5 Flash | Grok 3 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 73.1% | 55.6% |
| Omni-MATH | 38.5% | 46.4% |
| LMArena Math | 1415 | 1391 |
| FrontierMath (Feb 2025 set) | 4.8% | 3.8% |
| FrontierMath Tier 4 (v1) | 4.2% | 0% |
| MATH Level 5 | — | 88.7% |

## Knowledge

- Gemini 2.5 Flash: 36.4 (#168)
- Grok 3: 46.2 (#82)

| Benchmark | Gemini 2.5 Flash | Grok 3 |
|---|---|---|
| MMLU-Pro | 63.9% | 78.8% |
| Confabulations | 16.8% | 14.2% |
| Vectara Hallucination Rate | 7.8% | 5.8% |
| GPQA (HELM) | 39% | 65% |
| LMArena Expert | 1426 | 1421 |
| GPQA Diamond | — | 75.8% |
| Humanity's Last Exam | 12.1% | — |

## Multimodal

- Gemini 2.5 Flash: 41.8 (#32)
- Grok 3: —

| Benchmark | Gemini 2.5 Flash | Grok 3 |
|---|---|---|
| LMArena Vision | 1253 | — |
| GeoBench | 76% | — |
| VPCT | 46.2% | — |
| SpatialViz-Bench | 36.9% | — |

## Multilingual

- Gemini 2.5 Flash: 52.3 (#88)
- Grok 3: 52.3 (#87)

| Benchmark | Gemini 2.5 Flash | Grok 3 |
|---|---|---|
| LMArena Non-English | 1409 | 1410 |
| LMArena Chinese | 1450 | 1448 |
| LMArena French | 1433 | 1460 |
| LMArena German | 1418 | 1431 |
| LMArena Japanese | 1405 | 1387 |
| LMArena Korean | 1385 | 1373 |
| LMArena Russian | 1415 | 1416 |
| LMArena Spanish | 1421 | 1417 |

## Instruction Following

- Gemini 2.5 Flash: 75.7 (#54)
- Grok 3: 75.0 (#73)

| Benchmark | Gemini 2.5 Flash | Grok 3 |
|---|---|---|
| IFEval | 89.8% | 88.4% |
| LMArena Instruction Following | 1405 | 1409 |

## Long Context

- Gemini 2.5 Flash: 47.5 (#17)
- Grok 3: 38.7 (#192)

| Benchmark | Gemini 2.5 Flash | Grok 3 |
|---|---|---|
| Fiction.LiveBench | 77.8% | 58.3% |
| LMArena Longer Query | 1419 | 1439 |

## Writing & Preference

- Gemini 2.5 Flash: 53.8 (#157)
- Grok 3: 55.8 (#141)

| Benchmark | Gemini 2.5 Flash | Grok 3 |
|---|---|---|
| LMArena Text | 1417 | 1426 |
| LMArena Creative Writing | 1400 | 1414 |
| Short-Story Creative Writing | 76.5% | 76.4% |
| EQ-Bench Creative Writing | 1137 | 1186 |
| WildBench | 81.7% | 84.9% |
| LMArena Multi-Turn | 1408 | 1425 |

## FAQ

### Is Gemini 2.5 Flash better than Grok 3?

Gemini 2.5 Flash and Grok 3 score almost the same on the Noometry Index (39.3 vs 39.9), so choose on price, context window or the category you care about most.

### Is Gemini 2.5 Flash or Grok 3 better for coding?

Grok 3 scores higher on coding benchmarks: 41.9 versus 35.8 in the Noometry coding category.

### How many benchmarks do Gemini 2.5 Flash and Grok 3 share?

38 benchmarks have published results for both models. Gemini 2.5 Flash has 54 scored results on Noometry and Grok 3 has 40.