Model comparison
Gemini 3 Flash Preview vs Grok 4.6
Grok 4.6 is the stronger model overall, scoring 56.9 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.
Last verified . 40 shared benchmarks.
GoogleSummary
- 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 67.0 to 51.7.
- 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.
Side by side
| Gemini 3 Flash Preview | Grok 4.6 | |
|---|---|---|
| Provider | xAI | |
| Noometry Index | 52.3 | 56.9 |
| Released | 2025-12-17 | 2026-08-12 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | 500K |
| Max output | 66K | 500K |
| Input $ / M tokens | $0.50 | $2 |
| Output $ / M tokens | $3 | $6 |
| Results tracked | 59 | 49 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Grok 4.6 leads
Gemini 3 Flash Preview: 50.9 (#42), Grok 4.6: 58.5 (#16)
| Benchmark | Gemini 3 Flash Preview | Grok 4.6 |
|---|---|---|
| LMArena WebDev | 1439 | 1617 |
| WeirdML | 61.6% | 67.3% |
| LMArena Coding | 1460 | 1465 |
| 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 Too close to call
Gemini 3 Flash Preview: 38.7 (#29), Grok 4.6: 39.4 (#27)
| 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 Grok 4.6 leads
Gemini 3 Flash Preview: 49.2 (#37), Grok 4.6: 61.4 (#20)
| 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 | 1447 |
| Mystery Game Puzzles | 26% | 34% |
| DTBench | 89.1% | 97.3% |
| LMCA | 43.1% | 48.5% |
| Epoch Capabilities Index | 151.8 | 156.44 |
| CritPt | — | 19.7% |
| EBR-Bench | — | 30.5% |
| ForecastBench | 58.5 | — |
Math Grok 4.6 leads
Gemini 3 Flash Preview: 51.7 (#55), Grok 4.6: 67.0 (#24)
| 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 | 1473 | 1423 |
| MathArena Final-Answer Competitions | 67.6% | — |
| FrontierMath (Feb 2025 set) | 35.6% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Grok 4.6 leads
Gemini 3 Flash Preview: 58.8 (#33), Grok 4.6: 63.3 (#20)
| Benchmark | Gemini 3 Flash Preview | Grok 4.6 |
|---|---|---|
| GPQA Diamond | 89.4% | 94% |
| SimpleQA Verified | 66.8% | 49.3% |
| LMArena Expert | 1462 | 1467 |
| Vectara Hallucination Rate | 13.5% | — |
Multimodal Gemini 3 Flash Preview leads
Gemini 3 Flash Preview: 45.5 (#16), Grok 4.6: 43.6 (#23)
| Benchmark | Gemini 3 Flash Preview | Grok 4.6 |
|---|---|---|
| LMArena Vision | 1285 | 1263 |
| Blueprint-Bench 2 | 0% | 33.2% |
| LMArena Document | 1413 | 1452 |
| GeoBench | 88% | — |
| VPCT | 72.6% | — |
| Furniture Assembly | — | 40% |
Multilingual Gemini 3 Flash Preview leads
Gemini 3 Flash Preview: 55.7 (#27), Grok 4.6: 53.0 (#74)
| Benchmark | Gemini 3 Flash Preview | Grok 4.6 |
|---|---|---|
| LMArena Non-English | 1458 | 1420 |
| LMArena Chinese | 1511 | 1480 |
| LMArena French | 1477 | 1461 |
| LMArena German | 1497 | 1431 |
| LMArena Japanese | 1489 | 1376 |
| LMArena Korean | 1443 | 1397 |
| LMArena Russian | 1480 | 1422 |
| LMArena Spanish | 1469 | 1404 |
Instruction Following Too close to call
Gemini 3 Flash Preview: 75.7 (#56), Grok 4.6: 75.4 (#63)
| Benchmark | Gemini 3 Flash Preview | Grok 4.6 |
|---|---|---|
| LMArena Instruction Following | 1437 | 1431 |
Long Context Too close to call
Gemini 3 Flash Preview: 44.4 (#67), Grok 4.6: 44.5 (#66)
| Benchmark | Gemini 3 Flash Preview | Grok 4.6 |
|---|---|---|
| LMArena Longer Query | 1452 | 1454 |
Writing & Preference Gemini 3 Flash Preview leads
Gemini 3 Flash Preview: 65.5 (#45), Grok 4.6: 62.3 (#80)
| Benchmark | Gemini 3 Flash Preview | Grok 4.6 |
|---|---|---|
| LMArena Text | 1466 | 1428 |
| LMArena Creative Writing | 1457 | 1428 |
| LMArena Multi-Turn | 1471 | 1425 |
Frequently asked questions
Is Gemini 3 Flash Preview better than Grok 4.6?
Grok 4.6 is the stronger model overall, scoring 56.9 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: 58.5 versus 50.9 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.