# Gemini 2.5 Pro vs Grok 4.5

> Grok 4.5 is the stronger model overall, scoring 55.0 to 44.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-2-5-pro-vs-grok-4-5
- Last updated: 2026-10-10
- Shared benchmarks: 40

## Summary

- They share 40 benchmarks with published results for both. Gemini 2.5 Pro scores higher in 3 categories and Grok 4.5 in 7 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Grok 4.5 leads 60.7 to 31.9.
- The biggest single-benchmark swing is ARC-AGI-2: 4.9% for Gemini 2.5 Pro and 52.6% for Grok 4.5.
- Grok 4.5 is cheaper at $2 / $6 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 500K.

## Snapshot

| | Gemini 2.5 Pro | Grok 4.5 |
|---|---|---|
| Provider | Google | xAI |
| Noometry Index | 44.9 | 55.0 |
| Rank | 67 | 22 |
| Context | 1.05M | 500K |
| Input $/M | $1.25 | $2 |
| Output $/M | $10 | $6 |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 2.5 Pro: 42.8 (#86)
- Grok 4.5: 51.7 (#34)

| Benchmark | Gemini 2.5 Pro | Grok 4.5 |
|---|---|---|
| LMArena WebDev | 1227 | 1552 |
| SciCode | 42.8% | 54.1% |
| WeirdML | 54% | 46.4% |
| LMArena Coding | 1452 | 1473 |
| ALE-Bench | 785.52 | 1,309 |
| SWE-bench Verified | 57.6% | — |
| DeepSWE | — | 53.8% |
| FrontierCode | — | 42.4% |
| 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 4.5: 44.4 (#15)

| Benchmark | Gemini 2.5 Pro | Grok 4.5 |
|---|---|---|
| τ²-bench Banking | 13.7% | 47.9% |
| LMArena Search | 1142 | 1213 |
| Vending-Bench 2 | 573.64 | 3,887 |
| Terminal-Bench | 32.6% | — |
| APEX-Agents | — | 56.2% |
| GDPval | 23.3% | — |
| Remote Labor Index | 0.8% | — |
| TheAgentCompany | 30.3% | — |
| DeepResearch Bench | 42.8% | — |
| PostTrainBench | — | 23.4% |
| BALROG | 43.3% | — |
| GBAEval | — | 65.4% |
| GDP.pdf | — | 14% |
| METR Time Horizons | 55.4% | — |

## Reasoning

- Gemini 2.5 Pro: 28.8 (#85)
- Grok 4.5: 56.0 (#23)

| Benchmark | Gemini 2.5 Pro | Grok 4.5 |
|---|---|---|
| ARC-AGI-2 | 4.9% | 52.6% |
| SimpleBench | 62.4% | 70% |
| Kagi LLM Benchmark | 70.3% | 83.5% |
| ARC-AGI-1 | 41% | 87.2% |
| CritPt | 2% | 15.4% |
| Chess Puzzles | 20% | 36% |
| LMArena Hard Prompts | 1455 | 1462 |
| DTBench | 82.4% | 96.5% |
| LMCA | 34.8% | 45.2% |
| Epoch Capabilities Index | 145.32 | 154.02 |
| NYT Connections (extended) | — | 79.9% |
| EnigmaEval | 5.6% | — |
| LiveBench Reasoning | 89.8% | — |
| LiveBench Data Analysis | 79.9% | — |
| Surface Evolver Bench | — | 74.4% |
| ForecastBench | 61.3 | — |
| LiveBench | 82.3% | — |

## Math

- Gemini 2.5 Pro: 31.9 (#191)
- Grok 4.5: 60.7 (#29)

| Benchmark | Gemini 2.5 Pro | Grok 4.5 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 24.6% | 57.2% |
| FrontierMath Tier 4 | 0% | 24.4% |
| OTIS Mock AIME 2024-2025 | 84.7% | 97.8% |
| LMArena Math | 1450 | 1457 |
| ProofBench | — | 31% |
| 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 4.5: 62.3 (#21)

| Benchmark | Gemini 2.5 Pro | Grok 4.5 |
|---|---|---|
| GPQA Diamond | 85.3% | 93.4% |
| LMArena Expert | 1452 | 1466 |
| Humanity's Last Exam | 21.6% | — |
| SimpleQA Verified | — | 48.3% |
| MMLU-Pro | 86.3% | — |
| Confabulations | 10.6% | — |
| Vectara Hallucination Rate | 7% | — |
| GPQA (HELM) | 74.9% | — |

## Multimodal

- Gemini 2.5 Pro: 44.5 (#16)
- Grok 4.5: 37.8 (#63)

| Benchmark | Gemini 2.5 Pro | Grok 4.5 |
|---|---|---|
| LMArena Vision | 1263 | 1287 |
| LMArena Document | 1421 | 1452 |
| GeoBench | 86% | — |
| VPCT | 48% | — |
| Blueprint-Bench 2 | — | 27.3% |
| Furniture Assembly | — | 22.5% |
| SpatialViz-Bench | 44.7% | — |

## Multilingual

- Gemini 2.5 Pro: 55.5 (#30)
- Grok 4.5: 54.5 (#43)

| Benchmark | Gemini 2.5 Pro | Grok 4.5 |
|---|---|---|
| LMArena Non-English | 1452 | 1439 |
| LMArena Chinese | 1507 | 1497 |
| LMArena French | 1473 | 1458 |
| LMArena German | 1487 | 1448 |
| LMArena Japanese | 1462 | 1425 |
| LMArena Korean | 1435 | 1402 |
| LMArena Russian | 1460 | 1447 |
| LMArena Spanish | 1473 | 1452 |

## Instruction Following

- Gemini 2.5 Pro: 75.2 (#71)
- Grok 4.5: 76.3 (#45)

| Benchmark | Gemini 2.5 Pro | Grok 4.5 |
|---|---|---|
| LMArena Instruction Following | 1436 | 1446 |
| LiveBench Instruction Following | 80.6% | — |
| IFEval | 84% | — |

## Long Context

- Gemini 2.5 Pro: 59.7 (#5)
- Grok 4.5: 44.8 (#54)

| Benchmark | Gemini 2.5 Pro | Grok 4.5 |
|---|---|---|
| LMArena Longer Query | 1449 | 1463 |
| Fiction.LiveBench | 91.7% | — |

## Writing & Preference

- Gemini 2.5 Pro: 63.9 (#60)
- Grok 4.5: 65.9 (#40)

| Benchmark | Gemini 2.5 Pro | Grok 4.5 |
|---|---|---|
| LMArena Text | 1458 | 1448 |
| LMArena Creative Writing | 1453 | 1442 |
| EQ-Bench Creative Writing | 1421 | 1579 |
| LMArena Multi-Turn | 1453 | 1457 |
| Short-Story Creative Writing | 83.8% | — |
| WildBench | 85.7% | — |
| LiveBench Language | 67.8% | — |

## FAQ

### Is Gemini 2.5 Pro better than Grok 4.5?

Grok 4.5 is the stronger model overall, scoring 55.0 to 44.9 on the Noometry Index.

### Which is cheaper, Gemini 2.5 Pro or Grok 4.5?

Grok 4.5 is cheaper. It lists at $2 per million input tokens and $6 per million output tokens; Gemini 2.5 Pro lists at $1.25 and $10.

### Is Gemini 2.5 Pro or Grok 4.5 better for coding?

Grok 4.5 scores higher on coding benchmarks: 51.7 versus 42.8 in the Noometry coding category.

### Which has the bigger context window?

Gemini 2.5 Pro does, with 1.05M tokens against 500K.

### How many benchmarks do Gemini 2.5 Pro and Grok 4.5 share?

40 benchmarks have published results for both models. Gemini 2.5 Pro has 78 scored results on Noometry and Grok 4.5 has 52.