# Gemini 3 Flash Preview vs Grok 4.6

> Grok 4.6 is the stronger model overall, scoring 56.8 to 52.3 on the Noometry Index. Gemini 3 Flash Preview costs 2.7× less per token, which makes it the better buy when Grok 4.6's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gemini-3-flash-preview-vs-grok-4-6
- Last updated: 2026-10-10
- Shared benchmarks: 40

## Summary

- They share 40 benchmarks with published results for both. Gemini 3 Flash Preview scores higher in 4 categories and Grok 4.6 in 6 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in math, where Grok 4.6 leads 66.8 to 51.4.
- The biggest single-benchmark swing is ProofBench: 15% for Gemini 3 Flash Preview and 51% for Grok 4.6.
- Gemini 3 Flash Preview is cheaper at $0.50 / $3 per million input/output tokens, against $2 / $6 for Grok 4.6.
- Gemini 3 Flash Preview accepts more context: 1.05M tokens versus 500K.

## Snapshot

| | Gemini 3 Flash Preview | Grok 4.6 |
|---|---|---|
| Provider | Google | xAI |
| Noometry Index | 52.3 | 56.8 |
| Rank | 33 | 19 |
| Context | 1.05M | 500K |
| Input $/M | $0.50 | $2 |
| Output $/M | $3 | $6 |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 3 Flash Preview: 51.5 (#35)
- Grok 4.6: 58.0 (#14)

| Benchmark | Gemini 3 Flash Preview | Grok 4.6 |
|---|---|---|
| LMArena WebDev | 1439 | 1620 |
| WeirdML | 61.6% | 67.3% |
| LMArena Coding | 1460 | 1464 |
| ALE-Bench | 1,367 | 1,508 |
| SWE-bench Verified | 75.4% | — |
| DeepSWE | — | 67.5% |
| FrontierCode | — | 48% |
| SWE-bench Verified (bash only) | 75.8% | — |
| CursorBench | — | 41.4% |
| SWE-bench Multilingual | 72.7% | — |
| FrontierSWE | — | 25.3% |
| SciCode | — | 56.5% |
| GSO | 9.8% | — |

## Agentic & Tool Use

- Gemini 3 Flash Preview: 38.6 (#27)
- Grok 4.6: 39.4 (#25)

| Benchmark | Gemini 3 Flash Preview | Grok 4.6 |
|---|---|---|
| GDP.pdf | 10% | 17.2% |
| Vending-Bench 2 | 3,635 | 9,047 |
| Terminal-Bench | 64.3% | — |
| APEX-Agents | — | 65.3% |
| τ²-bench Airline | 82.5% | — |
| τ²-bench Banking | 27.3% | — |
| τ²-bench Retail | 76.8% | — |
| τ²-bench Telecom | 91.2% | — |
| DeepResearch Bench | 49.8% | — |
| BALROG | 48.1% | — |
| LMArena Search | 1198 | — |

## Reasoning

- Gemini 3 Flash Preview: 49.2 (#35)
- Grok 4.6: 61.3 (#18)

| Benchmark | Gemini 3 Flash Preview | Grok 4.6 |
|---|---|---|
| ARC-AGI-2 | 33.6% | 67.1% |
| SimpleBench | 61.1% | 75.9% |
| NYT Connections (extended) | 83.1% | 80% |
| ARC-AGI-1 | 84.7% | 87.5% |
| Chess Puzzles | 40% | 40% |
| LMArena Hard Prompts | 1465 | 1445 |
| Mystery Game Puzzles | 26% | 34% |
| DTBench | 89.1% | 97.3% |
| LMCA | 43.1% | 48.5% |
| Epoch Capabilities Index | 151.83 | 156.48 |
| CritPt | — | 19.7% |
| EBR-Bench | — | 30.5% |
| ForecastBench | 58.5 | — |

## Math

- Gemini 3 Flash Preview: 51.4 (#42)
- Grok 4.6: 66.8 (#19)

| Benchmark | Gemini 3 Flash Preview | Grok 4.6 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 51.2% | 66% |
| FrontierMath Tier 4 | 17.1% | 31.7% |
| OTIS Mock AIME 2024-2025 | 95.6% | 99.2% |
| ProofBench | 15% | 51% |
| LMArena Math | 1472 | 1416 |
| MathArena Final-Answer Competitions | 67.6% | — |
| FrontierMath (Feb 2025 set) | 35.6% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- Gemini 3 Flash Preview: 58.8 (#30)
- Grok 4.6: 63.3 (#18)

| Benchmark | Gemini 3 Flash Preview | Grok 4.6 |
|---|---|---|
| GPQA Diamond | 89.4% | 94% |
| SimpleQA Verified | 66.8% | 49.3% |
| LMArena Expert | 1461 | 1463 |
| Vectara Hallucination Rate | 13.5% | — |

## Multimodal

- Gemini 3 Flash Preview: 45.3 (#15)
- Grok 4.6: 43.9 (#18)

| Benchmark | Gemini 3 Flash Preview | Grok 4.6 |
|---|---|---|
| LMArena Vision | 1285 | 1265 |
| Blueprint-Bench 2 | 0% | 33.2% |
| LMArena Document | 1413 | 1452 |
| GeoBench | 88% | — |
| VPCT | 72.6% | — |
| Furniture Assembly | — | 40% |

## Multilingual

- Gemini 3 Flash Preview: 55.9 (#26)
- Grok 4.6: 53.3 (#67)

| Benchmark | Gemini 3 Flash Preview | Grok 4.6 |
|---|---|---|
| LMArena Non-English | 1458 | 1422 |
| LMArena Chinese | 1510 | 1479 |
| LMArena French | 1478 | 1458 |
| LMArena German | 1497 | 1425 |
| LMArena Japanese | 1488 | 1383 |
| LMArena Korean | 1443 | 1395 |
| LMArena Russian | 1480 | 1427 |
| LMArena Spanish | 1470 | 1408 |

## Instruction Following

- Gemini 3 Flash Preview: 75.8 (#52)
- Grok 4.6: 75.6 (#59)

| Benchmark | Gemini 3 Flash Preview | Grok 4.6 |
|---|---|---|
| LMArena Instruction Following | 1437 | 1431 |

## Long Context

- Gemini 3 Flash Preview: 44.4 (#63)
- Grok 4.6: 44.4 (#62)

| Benchmark | Gemini 3 Flash Preview | Grok 4.6 |
|---|---|---|
| LMArena Longer Query | 1452 | 1453 |

## Writing & Preference

- Gemini 3 Flash Preview: 65.6 (#44)
- Grok 4.6: 62.5 (#77)

| Benchmark | Gemini 3 Flash Preview | Grok 4.6 |
|---|---|---|
| LMArena Text | 1466 | 1427 |
| LMArena Creative Writing | 1457 | 1430 |
| LMArena Multi-Turn | 1471 | 1422 |

## FAQ

### Is Gemini 3 Flash Preview better than Grok 4.6?

Grok 4.6 is the stronger model overall, scoring 56.8 to 52.3 on the Noometry Index. Gemini 3 Flash Preview costs 2.7× less per token, which makes it the better buy when Grok 4.6's lead doesn't matter for your workload.

### Which is cheaper, Gemini 3 Flash Preview or Grok 4.6?

Gemini 3 Flash Preview is cheaper. It lists at $0.50 per million input tokens and $3 per million output tokens; Grok 4.6 lists at $2 and $6.

### Is Gemini 3 Flash Preview or Grok 4.6 better for coding?

Grok 4.6 scores higher on coding benchmarks: 58.0 versus 51.5 in the Noometry coding category.

### Which has the bigger context window?

Gemini 3 Flash Preview does, with 1.05M tokens against 500K.

### How many benchmarks do Gemini 3 Flash Preview and Grok 4.6 share?

40 benchmarks have published results for both models. Gemini 3 Flash Preview has 59 scored results on Noometry and Grok 4.6 has 49.