# Grok 3 vs Mercury 2.5

> Grok 3 has enough public results to be ranked (#150); Mercury 2.5 does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/grok-3-vs-mercury-2-5
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where Grok 3 leads 36.2 to 22.4.

## Snapshot

| | Grok 3 | Mercury 2.5 |
|---|---|---|
| Provider | xAI | Inception |
| Noometry Index | 39.6 | 30.2 |
| Rank | 150 | — |
| Context | — | 260K |
| Input $/M | — | $0.04 |
| Output $/M | — | $0.15 |
| Weights | Proprietary | Proprietary |

## Coding

- Grok 3: 41.5 (#113)
- Mercury 2.5: —

| Benchmark | Grok 3 | Mercury 2.5 |
|---|---|---|
| Aider Polyglot | 53.3% | — |
| WeirdML | 37.2% | — |
| LMArena Coding | 1432 | — |
| ALE-Bench | — | 301.65 |

## Agentic & Tool Use

- Grok 3: 30.2 (#69)
- Mercury 2.5: —

| Benchmark | Grok 3 | Mercury 2.5 |
|---|---|---|
| BALROG | 29.5% | — |

## Reasoning

- Grok 3: 13.8 (#322)
- Mercury 2.5: —

| Benchmark | Grok 3 | Mercury 2.5 |
|---|---|---|
| ARC-AGI-2 | 0% | — |
| SimpleBench | 36.1% | — |
| Kagi LLM Benchmark | 61.3% | — |
| ARC-AGI-1 | 5.5% | — |
| LMArena Hard Prompts | 1433 | — |
| Epoch Capabilities Index | 138.34 | — |

## Math

- Grok 3: 36.2 (#122)
- Mercury 2.5: 22.4

| Benchmark | Grok 3 | Mercury 2.5 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 55.6% | — |
| ProofBench | — | 3% |
| Omni-MATH | 46.4% | — |
| LMArena Math | 1390 | — |
| MATH Level 5 | 88.7% | — |
| FrontierMath (Feb 2025 set) | 3.8% | — |
| FrontierMath Tier 4 (v1) | 0% | — |

## Knowledge

- Grok 3: 46.0 (#76)
- Mercury 2.5: —

| Benchmark | Grok 3 | Mercury 2.5 |
|---|---|---|
| GPQA Diamond | 75.8% | — |
| MMLU-Pro | 78.8% | — |
| Confabulations | 14.2% | — |
| Vectara Hallucination Rate | 5.8% | — |
| GPQA (HELM) | 65% | — |
| LMArena Expert | 1420 | — |

## Multilingual

- Grok 3: 52.5 (#81)
- Mercury 2.5: —

| Benchmark | Grok 3 | Mercury 2.5 |
|---|---|---|
| LMArena Non-English | 1411 | — |
| LMArena Chinese | 1448 | — |
| LMArena French | 1460 | — |
| LMArena German | 1431 | — |
| LMArena Japanese | 1389 | — |
| LMArena Korean | 1374 | — |
| LMArena Russian | 1416 | — |
| LMArena Spanish | 1417 | — |

## Instruction Following

- Grok 3: 75.2 (#69)
- Mercury 2.5: —

| Benchmark | Grok 3 | Mercury 2.5 |
|---|---|---|
| IFEval | 88.4% | — |
| LMArena Instruction Following | 1409 | — |

## Long Context

- Grok 3: 38.7 (#187)
- Mercury 2.5: —

| Benchmark | Grok 3 | Mercury 2.5 |
|---|---|---|
| Fiction.LiveBench | 58.3% | — |
| LMArena Longer Query | 1439 | — |

## Writing & Preference

- Grok 3: 56.0 (#136)
- Mercury 2.5: —

| Benchmark | Grok 3 | Mercury 2.5 |
|---|---|---|
| LMArena Text | 1426 | — |
| LMArena Creative Writing | 1414 | — |
| Short-Story Creative Writing | 76.4% | — |
| EQ-Bench Creative Writing | 1186 | — |
| WildBench | 84.9% | — |
| LMArena Multi-Turn | 1424 | — |

## FAQ

### Is Grok 3 better than Mercury 2.5?

Grok 3 has enough public results to be ranked (#150); Mercury 2.5 does not yet, so treat this comparison as directional.

### How many benchmarks do Grok 3 and Mercury 2.5 share?

0 benchmarks have published results for both models. Grok 3 has 40 scored results on Noometry and Mercury 2.5 has 2.