# Grok 4.1 Fast vs o1-mini

> Grok 4.1 Fast is the stronger model overall, scoring 40.9 to 33.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-4-1-fast-vs-o1-mini
- Last updated: 2026-10-10
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. Grok 4.1 Fast scores higher in 6 categories and o1-mini in 3 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.1 Fast leads 42.3 to 8.9.
- The biggest single-benchmark swing is SimpleBench: 56% for Grok 4.1 Fast and 18.1% for o1-mini.

## Snapshot

| | Grok 4.1 Fast | o1-mini |
|---|---|---|
| Provider | xAI | OpenAI |
| Noometry Index | 40.9 | 33.7 |
| Rank | 131 | 230 |
| Context | 128K | — |
| Input $/M | $0.20 | — |
| Output $/M | $0.50 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Grok 4.1 Fast: 33.8 (#236)
- o1-mini: 35.1 (#218)

| Benchmark | Grok 4.1 Fast | o1-mini |
|---|---|---|
| LMArena Coding | 1411 | 1362 |
| Aider Polyglot | — | 32.9% |
| LMArena WebDev | 1241 | — |
| WeirdML | — | 36.3% |
| LiveBench Coding | — | 48% |
| ALE-Bench | 394.93 | — |
| HumanEval+ | — | 89% |
| MBPP+ | — | 78.8% |

## Agentic & Tool Use

- Grok 4.1 Fast: 36.1 (#35)
- o1-mini: 24.3 (#112)

| Benchmark | Grok 4.1 Fast | o1-mini |
|---|---|---|
| Berkeley Function Calling Leaderboard | 69.6% | — |
| τ²-bench Banking | 13.1% | — |
| Cybench | — | 10% |
| LMArena Search | 1171 | — |
| Vending-Bench 2 | 1,107 | — |

## Reasoning

- Grok 4.1 Fast: 42.3 (#45)
- o1-mini: 8.9 (#340)

| Benchmark | Grok 4.1 Fast | o1-mini |
|---|---|---|
| SimpleBench | 56% | 18.1% |
| LMArena Hard Prompts | 1407 | 1333 |
| ARC-AGI-2 | — | 0.8% |
| NYT Connections (extended) | 87.4% | — |
| ARC-AGI-1 | — | 14% |
| LiveBench Reasoning | — | 72.3% |
| DTBench | 87.7% | — |
| LiveBench Data Analysis | — | 57.9% |
| Epoch Capabilities Index | — | 135.82 |
| ForecastBench | 61 | — |
| LiveBench | — | 57.8% |

## Math

- Grok 4.1 Fast: 30.9 (#201)
- o1-mini: 33.7 (#168)

| Benchmark | Grok 4.1 Fast | o1-mini |
|---|---|---|
| LMArena Math | 1408 | 1358 |
| MathArena Final-Answer Competitions | 60.9% | — |
| OTIS Mock AIME 2024-2025 | — | 46.9% |
| ProofBench | 4% | — |
| LiveBench Math | — | 62% |
| MATH Level 5 | — | 89.2% |
| FrontierMath (Feb 2025 set) | — | 1.7% |

## Knowledge

- Grok 4.1 Fast: 32.6 (#203)
- o1-mini: 34.8 (#180)

| Benchmark | Grok 4.1 Fast | o1-mini |
|---|---|---|
| LMArena Expert | 1398 | 1316 |
| GPQA Diamond | — | 62.4% |
| Confabulations | — | 18.6% |
| Vectara Hallucination Rate | 17.8% | — |

## Multimodal

- Grok 4.1 Fast: 36.3 (#71)
- o1-mini: —

| Benchmark | Grok 4.1 Fast | o1-mini |
|---|---|---|
| LMArena Vision | 1201 | — |

## Multilingual

- Grok 4.1 Fast: 51.1 (#110)
- o1-mini: 43.8 (#177)

| Benchmark | Grok 4.1 Fast | o1-mini |
|---|---|---|
| LMArena Non-English | 1391 | 1289 |
| LMArena Chinese | 1441 | 1314 |
| LMArena French | 1416 | 1292 |
| LMArena German | 1404 | 1278 |
| LMArena Japanese | 1347 | 1245 |
| LMArena Korean | 1361 | 1223 |
| LMArena Russian | 1387 | 1283 |
| LMArena Spanish | 1411 | 1302 |

## Instruction Following

- Grok 4.1 Fast: 72.8 (#127)
- o1-mini: 67.0 (#200)

| Benchmark | Grok 4.1 Fast | o1-mini |
|---|---|---|
| LMArena Instruction Following | 1376 | 1304 |
| LiveBench Instruction Following | — | 65.4% |

## Long Context

- Grok 4.1 Fast: 42.4 (#121)
- o1-mini: 40.1 (#156)

| Benchmark | Grok 4.1 Fast | o1-mini |
|---|---|---|
| LMArena Longer Query | 1390 | 1321 |

## Writing & Preference

- Grok 4.1 Fast: 57.4 (#126)
- o1-mini: 48.6 (#196)

| Benchmark | Grok 4.1 Fast | o1-mini |
|---|---|---|
| LMArena Text | 1408 | 1317 |
| LMArena Creative Writing | 1394 | 1244 |
| LMArena Multi-Turn | 1389 | 1314 |
| Short-Story Creative Writing | — | 64.9% |
| EQ-Bench Creative Writing | 1327 | — |
| LiveBench Language | — | 40.9% |

## FAQ

### Is Grok 4.1 Fast better than o1-mini?

Grok 4.1 Fast is the stronger model overall, scoring 40.9 to 33.7 on the Noometry Index.

### Is Grok 4.1 Fast or o1-mini better for coding?

o1-mini scores higher on coding benchmarks: 35.1 versus 33.8 in the Noometry coding category.

### How many benchmarks do Grok 4.1 Fast and o1-mini share?

18 benchmarks have published results for both models. Grok 4.1 Fast has 32 scored results on Noometry and o1-mini has 39.