# Gemini 3.1 Flash Lite vs Grok-3 mini

> Gemini 3.1 Flash Lite and Grok-3 mini score almost the same on the Noometry Index (40.4 vs 41.0), 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-mini
- Last updated: 2026-10-10
- Shared benchmarks: 22

## Summary

- They share 22 benchmarks with published results for both. Gemini 3.1 Flash Lite scores higher in 4 categories and Grok-3 mini in 4 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 WeirdML: 52.2% for Gemini 3.1 Flash Lite and 42.6% for Grok-3 mini.

## Snapshot

| | Gemini 3.1 Flash Lite | Grok-3 mini |
|---|---|---|
| Provider | Google | xAI |
| Noometry Index | 40.4 | 41.0 |
| Rank | 141 | 130 |
| 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 mini: 40.4 (#126)

| Benchmark | Gemini 3.1 Flash Lite | Grok-3 mini |
|---|---|---|
| WeirdML | 52.2% | 42.6% |
| LMArena Coding | 1400 | 1380 |
| Aider Polyglot | — | 49.3% |
| LMArena WebDev | 1256 | — |
| SciCode | 41.9% | — |
| ALE-Bench | 797.73 | — |

## Agentic & Tool Use

- Gemini 3.1 Flash Lite: 29.9 (#72)
- Grok-3 mini: —

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

## Reasoning

- Gemini 3.1 Flash Lite: 22.3 (#181)
- Grok-3 mini: 13.8 (#323)

| Benchmark | Gemini 3.1 Flash Lite | Grok-3 mini |
|---|---|---|
| Kagi LLM Benchmark | 67.2% | 61.3% |
| LMArena Hard Prompts | 1407 | 1374 |
| Epoch Capabilities Index | 144.45 | 140.35 |
| ARC-AGI-2 | — | 0.4% |
| NYT Connections (extended) | 8.2% | — |
| ARC-AGI-1 | — | 16.5% |
| 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 mini: 40.3 (#78)

| Benchmark | Gemini 3.1 Flash Lite | Grok-3 mini |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 80% | 77.8% |
| LMArena Math | 1427 | 1386 |
| FrontierMath (Tiers 1-3) | 27.7% | — |
| Omni-MATH | — | 31.8% |
| MATH Level 5 | — | 90.9% |
| FrontierMath (Feb 2025 set) | — | 5.9% |

## Knowledge

- Gemini 3.1 Flash Lite: 41.7 (#95)
- Grok-3 mini: 46.3 (#75)

| Benchmark | Gemini 3.1 Flash Lite | Grok-3 mini |
|---|---|---|
| GPQA Diamond | 81.8% | 76.3% |
| LMArena Expert | 1397 | 1395 |
| Humanity's Last Exam | 8.6% | — |
| MMLU-Pro | — | 79.9% |
| Confabulations | — | 10.8% |
| Vectara Hallucination Rate | 8.2% | — |
| GPQA (HELM) | — | 67.5% |

## Multimodal

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

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

## Multilingual

- Gemini 3.1 Flash Lite: 52.5 (#82)
- Grok-3 mini: 48.3 (#141)

| Benchmark | Gemini 3.1 Flash Lite | Grok-3 mini |
|---|---|---|
| LMArena Non-English | 1410 | 1352 |
| LMArena Chinese | 1461 | 1387 |
| LMArena French | 1423 | 1357 |
| LMArena German | 1429 | 1350 |
| LMArena Japanese | 1411 | 1343 |
| LMArena Korean | 1393 | 1336 |
| LMArena Russian | 1420 | 1352 |
| LMArena Spanish | 1420 | 1379 |

## Instruction Following

- Gemini 3.1 Flash Lite: 72.9 (#126)
- Grok-3 mini: 78.7 (#8)

| Benchmark | Gemini 3.1 Flash Lite | Grok-3 mini |
|---|---|---|
| LMArena Instruction Following | 1376 | 1356 |
| IFEval | — | 95.1% |

## Long Context

- Gemini 3.1 Flash Lite: 42.5 (#117)
- Grok-3 mini: 41.0 (#142)

| Benchmark | Gemini 3.1 Flash Lite | Grok-3 mini |
|---|---|---|
| LMArena Longer Query | 1394 | 1372 |
| Fiction.LiveBench | — | 66.7% |

## Writing & Preference

- Gemini 3.1 Flash Lite: 61.0 (#90)
- Grok-3 mini: 52.7 (#163)

| Benchmark | Gemini 3.1 Flash Lite | Grok-3 mini |
|---|---|---|
| LMArena Text | 1416 | 1370 |
| LMArena Creative Writing | 1401 | 1342 |
| LMArena Multi-Turn | 1417 | 1355 |
| Short-Story Creative Writing | — | 73.5% |
| WildBench | — | 65.1% |

## FAQ

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

Gemini 3.1 Flash Lite and Grok-3 mini score almost the same on the Noometry Index (40.4 vs 41.0), so choose on price, context window or the category you care about most.

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

Grok-3 mini scores higher on coding benchmarks: 40.4 versus 37.5 in the Noometry coding category.

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

22 benchmarks have published results for both models. Gemini 3.1 Flash Lite has 38 scored results on Noometry and Grok-3 mini has 35.