Model comparison
Gemini 3 Flash Preview vs Grok 4.3
Gemini 3 Flash Preview is the stronger model overall, scoring 52.3 to 43.6 on the Noometry Index.
Last verified . 37 shared benchmarks.
GoogleSummary
- They share 37 benchmarks with published results for both. Gemini 3 Flash Preview scores higher in 10 categories and Grok 4.3 in 0 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3 Flash Preview leads 49.2 to 34.9.
- The biggest single-benchmark swing is SimpleQA Verified: 66.8% for Gemini 3 Flash Preview and 33.2% for Grok 4.3.
- Gemini 3 Flash Preview is cheaper at $0.50 / $3 per million input/output tokens, against $1.25 / $2.50 for Grok 4.3.
- Gemini 3 Flash Preview accepts more context: 1.05M tokens versus 1M.
Side by side
| Gemini 3 Flash Preview | Grok 4.3 | |
|---|---|---|
| Provider | xAI | |
| Noometry Index | 52.3 | 43.6 |
| Released | 2025-12-17 | 2026-04-17 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | 1M |
| Max output | 66K | 30K |
| Input $ / M tokens | $0.50 | $1.25 |
| Output $ / M tokens | $3 | $2.50 |
| Results tracked | 59 | 40 |
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Category by category
Coding Gemini 3 Flash Preview leads
Gemini 3 Flash Preview: 51.5 (#35), Grok 4.3: 41.3 (#117)
| Benchmark | Gemini 3 Flash Preview | Grok 4.3 |
|---|---|---|
| LMArena WebDev | 1439 | 1357 |
| WeirdML | 61.6% | 49.9% |
| LMArena Coding | 1460 | 1415 |
| ALE-Bench | 1,367 | 944.17 |
| SWE-bench Verified | 75.4% | — |
| SWE-bench Verified (bash only) | 75.8% | — |
| SWE-bench Multilingual | 72.7% | — |
| SciCode | — | 47.3% |
| GSO | 9.8% | — |
Agentic & Tool Use Gemini 3 Flash Preview leads
Gemini 3 Flash Preview: 38.6 (#27), Grok 4.3: 27.6 (#93)
| Benchmark | Gemini 3 Flash Preview | Grok 4.3 |
|---|---|---|
| GDP.pdf | 10% | 8% |
| LMArena Search | 1198 | 1165 |
| Vending-Bench 2 | 3,635 | 35.26 |
| Terminal-Bench | 64.3% | — |
| 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% | — |
Reasoning Gemini 3 Flash Preview leads
Gemini 3 Flash Preview: 49.2 (#35), Grok 4.3: 34.9 (#60)
| Benchmark | Gemini 3 Flash Preview | Grok 4.3 |
|---|---|---|
| NYT Connections (extended) | 83.1% | 55.2% |
| Chess Puzzles | 40% | 25% |
| LMArena Hard Prompts | 1465 | 1397 |
| DTBench | 89.1% | 90.7% |
| LMCA | 43.1% | 38.3% |
| Epoch Capabilities Index | 151.83 | 149.13 |
| ForecastBench | 58.5 | 60.3 |
| ARC-AGI-2 | 33.6% | — |
| SimpleBench | 61.1% | — |
| ARC-AGI-1 | 84.7% | — |
| CritPt | — | 8% |
| Mystery Game Puzzles | 26% | — |
Math Gemini 3 Flash Preview leads
Gemini 3 Flash Preview: 51.4 (#42), Grok 4.3: 45.8 (#60)
| Benchmark | Gemini 3 Flash Preview | Grok 4.3 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 51.2% | 42.8% |
| FrontierMath Tier 4 | 17.1% | 14.6% |
| OTIS Mock AIME 2024-2025 | 95.6% | 93.3% |
| ProofBench | 15% | 11% |
| LMArena Math | 1472 | 1388 |
| MathArena Final-Answer Competitions | 67.6% | — |
| FrontierMath (Feb 2025 set) | 35.6% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Gemini 3 Flash Preview leads
Gemini 3 Flash Preview: 58.8 (#30), Grok 4.3: 52.5 (#57)
| Benchmark | Gemini 3 Flash Preview | Grok 4.3 |
|---|---|---|
| GPQA Diamond | 89.4% | 88.8% |
| SimpleQA Verified | 66.8% | 33.2% |
| LMArena Expert | 1461 | 1385 |
| Vectara Hallucination Rate | 13.5% | — |
Multimodal Gemini 3 Flash Preview leads
Gemini 3 Flash Preview: 45.3 (#15), Grok 4.3: 31.6 (#96)
| Benchmark | Gemini 3 Flash Preview | Grok 4.3 |
|---|---|---|
| LMArena Vision | 1285 | 1231 |
| Blueprint-Bench 2 | 0% | 0% |
| GeoBench | 88% | — |
| VPCT | 72.6% | — |
| LMArena Document | 1413 | — |
Multilingual Gemini 3 Flash Preview leads
Gemini 3 Flash Preview: 55.9 (#26), Grok 4.3: 50.7 (#114)
| Benchmark | Gemini 3 Flash Preview | Grok 4.3 |
|---|---|---|
| LMArena Non-English | 1458 | 1385 |
| LMArena Chinese | 1510 | 1423 |
| LMArena French | 1478 | 1412 |
| LMArena German | 1497 | 1395 |
| LMArena Japanese | 1488 | 1379 |
| LMArena Korean | 1443 | 1357 |
| LMArena Russian | 1480 | 1399 |
| LMArena Spanish | 1470 | 1402 |
Instruction Following Gemini 3 Flash Preview leads
Gemini 3 Flash Preview: 75.8 (#52), Grok 4.3: 72.3 (#135)
| Benchmark | Gemini 3 Flash Preview | Grok 4.3 |
|---|---|---|
| LMArena Instruction Following | 1437 | 1366 |
Long Context Gemini 3 Flash Preview leads
Gemini 3 Flash Preview: 44.4 (#63), Grok 4.3: 42.5 (#118)
| Benchmark | Gemini 3 Flash Preview | Grok 4.3 |
|---|---|---|
| LMArena Longer Query | 1452 | 1393 |
Writing & Preference Gemini 3 Flash Preview leads
Gemini 3 Flash Preview: 65.6 (#44), Grok 4.3: 58.6 (#112)
| Benchmark | Gemini 3 Flash Preview | Grok 4.3 |
|---|---|---|
| LMArena Text | 1466 | 1397 |
| LMArena Creative Writing | 1457 | 1380 |
| LMArena Multi-Turn | 1471 | 1406 |
| EQ-Bench 4 | — | 1075 |
Frequently asked questions
Is Gemini 3 Flash Preview better than Grok 4.3?
Gemini 3 Flash Preview is the stronger model overall, scoring 52.3 to 43.6 on the Noometry Index.
Which is cheaper, Gemini 3 Flash Preview or Grok 4.3?
Gemini 3 Flash Preview is cheaper. It lists at $0.50 per million input tokens and $3 per million output tokens; Grok 4.3 lists at $1.25 and $2.50.
Is Gemini 3 Flash Preview or Grok 4.3 better for coding?
Gemini 3 Flash Preview scores higher on coding benchmarks: 51.5 versus 41.3 in the Noometry coding category.
Which has the bigger context window?
Gemini 3 Flash Preview does, with 1.05M tokens against 1M.
How many benchmarks do Gemini 3 Flash Preview and Grok 4.3 share?
37 benchmarks have published results for both models. Gemini 3 Flash Preview has 59 scored results on Noometry and Grok 4.3 has 40.