# Gemini 3.1 Flash Lite vs Grok 3

> Gemini 3.1 Flash Lite and Grok 3 score almost the same on the Noometry Index (40.4 vs 39.6), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/gemini-3-1-flash-lite-vs-grok-3
- Last updated: 2026-10-10
- Shared benchmarks: 23

## Summary

- They share 23 benchmarks with published results for both. Gemini 3.1 Flash Lite scores higher in 4 categories and Grok 3 in 5 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.1 Flash Lite leads 22.3 to 13.8.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 80% for Gemini 3.1 Flash Lite and 55.6% for Grok 3.

## Snapshot

| | Gemini 3.1 Flash Lite | Grok 3 |
|---|---|---|
| Provider | Google | xAI |
| Noometry Index | 40.4 | 39.6 |
| Rank | 141 | 150 |
| Context | 1.05M | — |
| Input $/M | $0.25 | — |
| Output $/M | $1.50 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 3.1 Flash Lite: 37.5 (#179)
- Grok 3: 41.5 (#113)

| Benchmark | Gemini 3.1 Flash Lite | Grok 3 |
|---|---|---|
| WeirdML | 52.2% | 37.2% |
| LMArena Coding | 1400 | 1432 |
| Aider Polyglot | — | 53.3% |
| LMArena WebDev | 1256 | — |
| SciCode | 41.9% | — |
| ALE-Bench | 797.73 | — |

## Agentic & Tool Use

- Gemini 3.1 Flash Lite: 29.9 (#72)
- Grok 3: 30.2 (#69)

| Benchmark | Gemini 3.1 Flash Lite | Grok 3 |
|---|---|---|
| DeepResearch Bench | 37.3% | — |
| BALROG | — | 29.5% |

## Reasoning

- Gemini 3.1 Flash Lite: 22.3 (#181)
- Grok 3: 13.8 (#322)

| Benchmark | Gemini 3.1 Flash Lite | Grok 3 |
|---|---|---|
| Kagi LLM Benchmark | 67.2% | 61.3% |
| LMArena Hard Prompts | 1407 | 1433 |
| Epoch Capabilities Index | 144.45 | 138.34 |
| ARC-AGI-2 | — | 0% |
| SimpleBench | — | 36.1% |
| NYT Connections (extended) | 8.2% | — |
| ARC-AGI-1 | — | 5.5% |
| CritPt | 1.1% | — |
| Chess Puzzles | 25% | — |
| EnigmaEval | 3% | — |
| Thematic Generalization | 63.3% | — |
| DTBench | 76.8% | — |
| LMCA | 35% | — |
| ForecastBench | 54.4 | — |

## Math

- Gemini 3.1 Flash Lite: 39.5 (#82)
- Grok 3: 36.2 (#122)

| Benchmark | Gemini 3.1 Flash Lite | Grok 3 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 80% | 55.6% |
| LMArena Math | 1427 | 1390 |
| FrontierMath (Tiers 1-3) | 27.7% | — |
| Omni-MATH | — | 46.4% |
| MATH Level 5 | — | 88.7% |
| FrontierMath (Feb 2025 set) | — | 3.8% |
| FrontierMath Tier 4 (v1) | — | 0% |

## Knowledge

- Gemini 3.1 Flash Lite: 41.7 (#95)
- Grok 3: 46.0 (#76)

| Benchmark | Gemini 3.1 Flash Lite | Grok 3 |
|---|---|---|
| GPQA Diamond | 81.8% | 75.8% |
| Vectara Hallucination Rate | 8.2% | 5.8% |
| LMArena Expert | 1397 | 1420 |
| Humanity's Last Exam | 8.6% | — |
| MMLU-Pro | — | 78.8% |
| Confabulations | — | 14.2% |
| GPQA (HELM) | — | 65% |

## Multimodal

- Gemini 3.1 Flash Lite: 38.7 (#57)
- Grok 3: —

| Benchmark | Gemini 3.1 Flash Lite | Grok 3 |
|---|---|---|
| LMArena Vision | 1240 | — |

## Multilingual

- Gemini 3.1 Flash Lite: 52.5 (#82)
- Grok 3: 52.5 (#81)

| Benchmark | Gemini 3.1 Flash Lite | Grok 3 |
|---|---|---|
| LMArena Non-English | 1410 | 1411 |
| LMArena Chinese | 1461 | 1448 |
| LMArena French | 1423 | 1460 |
| LMArena German | 1429 | 1431 |
| LMArena Japanese | 1411 | 1389 |
| LMArena Korean | 1393 | 1374 |
| LMArena Russian | 1420 | 1416 |
| LMArena Spanish | 1420 | 1417 |

## Instruction Following

- Gemini 3.1 Flash Lite: 72.9 (#126)
- Grok 3: 75.2 (#69)

| Benchmark | Gemini 3.1 Flash Lite | Grok 3 |
|---|---|---|
| LMArena Instruction Following | 1376 | 1409 |
| IFEval | — | 88.4% |

## Long Context

- Gemini 3.1 Flash Lite: 42.5 (#117)
- Grok 3: 38.7 (#187)

| Benchmark | Gemini 3.1 Flash Lite | Grok 3 |
|---|---|---|
| LMArena Longer Query | 1394 | 1439 |
| Fiction.LiveBench | — | 58.3% |

## Writing & Preference

- Gemini 3.1 Flash Lite: 61.0 (#90)
- Grok 3: 56.0 (#136)

| Benchmark | Gemini 3.1 Flash Lite | Grok 3 |
|---|---|---|
| LMArena Text | 1416 | 1426 |
| LMArena Creative Writing | 1401 | 1414 |
| LMArena Multi-Turn | 1417 | 1424 |
| Short-Story Creative Writing | — | 76.4% |
| EQ-Bench Creative Writing | — | 1186 |
| WildBench | — | 84.9% |

## FAQ

### Is Gemini 3.1 Flash Lite better than Grok 3?

Gemini 3.1 Flash Lite and Grok 3 score almost the same on the Noometry Index (40.4 vs 39.6), so choose on price, context window or the category you care about most.

### Is Gemini 3.1 Flash Lite or Grok 3 better for coding?

Grok 3 scores higher on coding benchmarks: 41.5 versus 37.5 in the Noometry coding category.

### How many benchmarks do Gemini 3.1 Flash Lite and Grok 3 share?

23 benchmarks have published results for both models. Gemini 3.1 Flash Lite has 38 scored results on Noometry and Grok 3 has 40.