# Gemini 2.5 Pro vs Grok 4.3

> Gemini 2.5 Pro is the stronger model overall, scoring 44.9 to 43.6 on the Noometry Index. Grok 4.3 costs 2.2× less per token, which makes it the better buy when Gemini 2.5 Pro's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gemini-2-5-pro-vs-grok-4-3
- Last updated: 2026-10-10
- Shared benchmarks: 34

## Summary

- They share 34 benchmarks with published results for both. Gemini 2.5 Pro scores higher in 8 categories and Grok 4.3 in 2 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in long context, where Gemini 2.5 Pro leads 59.7 to 42.5.
- The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 24.6% for Gemini 2.5 Pro and 42.8% for Grok 4.3.
- Grok 4.3 is cheaper at $1.25 / $2.50 per million input/output tokens, against $1.25 / $10 for Gemini 2.5 Pro.
- Gemini 2.5 Pro accepts more context: 1.05M tokens versus 1M.

## Snapshot

| | Gemini 2.5 Pro | Grok 4.3 |
|---|---|---|
| Provider | Google | xAI |
| Noometry Index | 44.9 | 43.6 |
| Rank | 67 | 80 |
| Context | 1.05M | 1M |
| Input $/M | $1.25 | $1.25 |
| Output $/M | $10 | $2.50 |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 2.5 Pro: 42.8 (#86)
- Grok 4.3: 41.3 (#117)

| Benchmark | Gemini 2.5 Pro | Grok 4.3 |
|---|---|---|
| LMArena WebDev | 1227 | 1357 |
| SciCode | 42.8% | 47.3% |
| WeirdML | 54% | 49.9% |
| LMArena Coding | 1452 | 1415 |
| ALE-Bench | 785.52 | 944.17 |
| SWE-bench Verified | 57.6% | — |
| SWE-bench Verified (bash only) | 53.6% | — |
| Aider Polyglot | 83.1% | — |
| GSO | 3.9% | — |
| LiveBench Coding | 85.9% | — |
| CadEval | 64% | — |
| AlgoTune | 1.51 | — |

## Agentic & Tool Use

- Gemini 2.5 Pro: 29.1 (#81)
- Grok 4.3: 27.6 (#93)

| Benchmark | Gemini 2.5 Pro | Grok 4.3 |
|---|---|---|
| LMArena Search | 1142 | 1165 |
| Vending-Bench 2 | 573.64 | 35.26 |
| Terminal-Bench | 32.6% | — |
| GDPval | 23.3% | — |
| Remote Labor Index | 0.8% | — |
| TheAgentCompany | 30.3% | — |
| τ²-bench Banking | 13.7% | — |
| DeepResearch Bench | 42.8% | — |
| BALROG | 43.3% | — |
| GDP.pdf | — | 8% |
| METR Time Horizons | 55.4% | — |

## Reasoning

- Gemini 2.5 Pro: 28.8 (#85)
- Grok 4.3: 34.9 (#60)

| Benchmark | Gemini 2.5 Pro | Grok 4.3 |
|---|---|---|
| CritPt | 2% | 8% |
| Chess Puzzles | 20% | 25% |
| LMArena Hard Prompts | 1455 | 1397 |
| DTBench | 82.4% | 90.7% |
| LMCA | 34.8% | 38.3% |
| Epoch Capabilities Index | 145.32 | 149.13 |
| ForecastBench | 61.3 | 60.3 |
| ARC-AGI-2 | 4.9% | — |
| SimpleBench | 62.4% | — |
| Kagi LLM Benchmark | 70.3% | — |
| NYT Connections (extended) | — | 55.2% |
| ARC-AGI-1 | 41% | — |
| EnigmaEval | 5.6% | — |
| LiveBench Reasoning | 89.8% | — |
| LiveBench Data Analysis | 79.9% | — |
| LiveBench | 82.3% | — |

## Math

- Gemini 2.5 Pro: 31.9 (#191)
- Grok 4.3: 45.8 (#60)

| Benchmark | Gemini 2.5 Pro | Grok 4.3 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 24.6% | 42.8% |
| FrontierMath Tier 4 | 0% | 14.6% |
| OTIS Mock AIME 2024-2025 | 84.7% | 93.3% |
| LMArena Math | 1450 | 1388 |
| ProofBench | — | 11% |
| Omni-MATH | 41.6% | — |
| LiveBench Math | 90.2% | — |
| MATH Level 5 | 95.9% | — |
| FrontierMath (Feb 2025 set) | 14.1% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- Gemini 2.5 Pro: 55.8 (#41)
- Grok 4.3: 52.5 (#57)

| Benchmark | Gemini 2.5 Pro | Grok 4.3 |
|---|---|---|
| GPQA Diamond | 85.3% | 88.8% |
| LMArena Expert | 1452 | 1385 |
| Humanity's Last Exam | 21.6% | — |
| SimpleQA Verified | — | 33.2% |
| MMLU-Pro | 86.3% | — |
| Confabulations | 10.6% | — |
| Vectara Hallucination Rate | 7% | — |
| GPQA (HELM) | 74.9% | — |

## Multimodal

- Gemini 2.5 Pro: 44.5 (#16)
- Grok 4.3: 31.6 (#96)

| Benchmark | Gemini 2.5 Pro | Grok 4.3 |
|---|---|---|
| LMArena Vision | 1263 | 1231 |
| GeoBench | 86% | — |
| VPCT | 48% | — |
| Blueprint-Bench 2 | — | 0% |
| LMArena Document | 1421 | — |
| SpatialViz-Bench | 44.7% | — |

## Multilingual

- Gemini 2.5 Pro: 55.5 (#30)
- Grok 4.3: 50.7 (#114)

| Benchmark | Gemini 2.5 Pro | Grok 4.3 |
|---|---|---|
| LMArena Non-English | 1452 | 1385 |
| LMArena Chinese | 1507 | 1423 |
| LMArena French | 1473 | 1412 |
| LMArena German | 1487 | 1395 |
| LMArena Japanese | 1462 | 1379 |
| LMArena Korean | 1435 | 1357 |
| LMArena Russian | 1460 | 1399 |
| LMArena Spanish | 1473 | 1402 |

## Instruction Following

- Gemini 2.5 Pro: 75.2 (#71)
- Grok 4.3: 72.3 (#135)

| Benchmark | Gemini 2.5 Pro | Grok 4.3 |
|---|---|---|
| LMArena Instruction Following | 1436 | 1366 |
| LiveBench Instruction Following | 80.6% | — |
| IFEval | 84% | — |

## Long Context

- Gemini 2.5 Pro: 59.7 (#5)
- Grok 4.3: 42.5 (#118)

| Benchmark | Gemini 2.5 Pro | Grok 4.3 |
|---|---|---|
| LMArena Longer Query | 1449 | 1393 |
| Fiction.LiveBench | 91.7% | — |

## Writing & Preference

- Gemini 2.5 Pro: 63.9 (#60)
- Grok 4.3: 58.6 (#112)

| Benchmark | Gemini 2.5 Pro | Grok 4.3 |
|---|---|---|
| LMArena Text | 1458 | 1397 |
| LMArena Creative Writing | 1453 | 1380 |
| LMArena Multi-Turn | 1453 | 1406 |
| Short-Story Creative Writing | 83.8% | — |
| EQ-Bench Creative Writing | 1421 | — |
| WildBench | 85.7% | — |
| EQ-Bench 4 | — | 1075 |
| LiveBench Language | 67.8% | — |

## FAQ

### Is Gemini 2.5 Pro better than Grok 4.3?

Gemini 2.5 Pro is the stronger model overall, scoring 44.9 to 43.6 on the Noometry Index. Grok 4.3 costs 2.2× less per token, which makes it the better buy when Gemini 2.5 Pro's lead doesn't matter for your workload.

### Which is cheaper, Gemini 2.5 Pro or Grok 4.3?

Grok 4.3 is cheaper. It lists at $1.25 per million input tokens and $2.50 per million output tokens; Gemini 2.5 Pro lists at $1.25 and $10.

### Is Gemini 2.5 Pro or Grok 4.3 better for coding?

Gemini 2.5 Pro scores higher on coding benchmarks: 42.8 versus 41.3 in the Noometry coding category.

### Which has the bigger context window?

Gemini 2.5 Pro does, with 1.05M tokens against 1M.

### How many benchmarks do Gemini 2.5 Pro and Grok 4.3 share?

34 benchmarks have published results for both models. Gemini 2.5 Pro has 78 scored results on Noometry and Grok 4.3 has 40.