# Grok 4 vs Mercury 2.5

> Grok 4 has enough public results to be ranked (#49); Mercury 2.5 does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/grok-4-vs-mercury-2-5
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where Grok 4 leads 46.5 to 22.4.

## Snapshot

| | Grok 4 | Mercury 2.5 |
|---|---|---|
| Provider | xAI | Inception |
| Noometry Index | 47.8 | 30.2 |
| Rank | 49 | — |
| Context | — | 260K |
| Input $/M | — | $0.04 |
| Output $/M | — | $0.15 |
| Weights | Proprietary | Proprietary |

## Coding

- Grok 4: 49.9 (#44)
- Mercury 2.5: —

| Benchmark | Grok 4 | Mercury 2.5 |
|---|---|---|
| Aider Polyglot | 79.6% | — |
| WeirdML | 45.7% | — |
| LMArena Coding | 1408 | — |
| ALE-Bench | — | 301.65 |

## Agentic & Tool Use

- Grok 4: 32.1 (#62)
- Mercury 2.5: —

| Benchmark | Grok 4 | Mercury 2.5 |
|---|---|---|
| Terminal-Bench | 27.2% | — |
| Berkeley Function Calling Leaderboard | 63% | — |
| GDPval | 21.1% | — |
| Cybench | 43% | — |
| DeepResearch Bench | 47.3% | — |
| BALROG | 43.6% | — |
| LMArena Search | 1142 | — |
| METR Time Horizons | 66.6% | — |

## Reasoning

- Grok 4: 36.9 (#59)
- Mercury 2.5: —

| Benchmark | Grok 4 | Mercury 2.5 |
|---|---|---|
| ARC-AGI-2 | 16% | — |
| SimpleBench | 60.5% | — |
| Kagi LLM Benchmark | 73.6% | — |
| ARC-AGI-1 | 66.7% | — |
| Chess Puzzles | 28% | — |
| LMArena Hard Prompts | 1409 | — |
| Epoch Capabilities Index | 146.46 | — |
| ForecastBench | 60.9 | — |

## Math

- Grok 4: 46.5 (#58)
- Mercury 2.5: 22.4

| Benchmark | Grok 4 | Mercury 2.5 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 84% | — |
| ProofBench | — | 3% |
| Omni-MATH | 60.3% | — |
| LMArena Math | 1422 | — |
| FrontierMath (Feb 2025 set) | 19.7% | — |
| FrontierMath Tier 4 (v1) | 2.1% | — |

## Knowledge

- Grok 4: 53.7 (#50)
- Mercury 2.5: —

| Benchmark | Grok 4 | Mercury 2.5 |
|---|---|---|
| GPQA Diamond | 87% | — |
| MMLU-Pro | 85.1% | — |
| Confabulations | 12.4% | — |
| GPQA (HELM) | 72.7% | — |
| LMArena Expert | 1417 | — |

## Multimodal

- Grok 4: 33.1 (#89)
- Mercury 2.5: —

| Benchmark | Grok 4 | Mercury 2.5 |
|---|---|---|
| LMArena Vision | 1211 | — |
| GeoBench | 45% | — |

## Multilingual

- Grok 4: 52.0 (#98)
- Mercury 2.5: —

| Benchmark | Grok 4 | Mercury 2.5 |
|---|---|---|
| LMArena Non-English | 1403 | — |
| LMArena Chinese | 1428 | — |
| LMArena French | 1418 | — |
| LMArena German | 1429 | — |
| LMArena Japanese | 1396 | — |
| LMArena Korean | 1376 | — |
| LMArena Russian | 1409 | — |
| LMArena Spanish | 1419 | — |

## Instruction Following

- Grok 4: 79.4 (#4)
- Mercury 2.5: —

| Benchmark | Grok 4 | Mercury 2.5 |
|---|---|---|
| IFEval | 94.9% | — |
| LMArena Instruction Following | 1387 | — |

## Long Context

- Grok 4: 63.1 (#4)
- Mercury 2.5: —

| Benchmark | Grok 4 | Mercury 2.5 |
|---|---|---|
| Fiction.LiveBench | 94.4% | — |
| LMArena Longer Query | 1409 | — |

## Writing & Preference

- Grok 4: 58.7 (#111)
- Mercury 2.5: —

| Benchmark | Grok 4 | Mercury 2.5 |
|---|---|---|
| LMArena Text | 1412 | — |
| LMArena Creative Writing | 1397 | — |
| Short-Story Creative Writing | 76.9% | — |
| WildBench | 79.7% | — |
| LMArena Multi-Turn | 1416 | — |

## FAQ

### Is Grok 4 better than Mercury 2.5?

Grok 4 has enough public results to be ranked (#49); Mercury 2.5 does not yet, so treat this comparison as directional.

### How many benchmarks do Grok 4 and Mercury 2.5 share?

0 benchmarks have published results for both models. Grok 4 has 48 scored results on Noometry and Mercury 2.5 has 2.