Model comparison
Grok 4 Fast vs o1-mini
Grok 4 Fast is the stronger model overall, scoring 39.4 to 34.0 on the Noometry Index.
Last verified . 22 shared benchmarks.
Summary
- They share 22 benchmarks with published results for both. Grok 4 Fast scores higher in 7 categories and o1-mini in 2 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in long context, where Grok 4 Fast leads 63.2 to 40.1.
- The biggest single-benchmark swing is ARC-AGI-1: 48.5% for Grok 4 Fast and 14% for o1-mini.
Side by side
| Grok 4 Fast | o1-mini | |
|---|---|---|
| Provider | xAI | OpenAI |
| Noometry Index | 39.4 | 34.0 |
| Released | 2025-09-19 | 2024-09-12 |
| Weights | Proprietary | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 30 | 39 |
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Category by category
Coding o1-mini leads
Grok 4 Fast: 32.5 (#271), o1-mini: 35.5 (#224)
| Benchmark | Grok 4 Fast | o1-mini |
|---|---|---|
| WeirdML | 42.9% | 36.3% |
| LMArena Coding | 1429 | 1362 |
| Aider Polyglot | — | 32.9% |
| LMArena WebDev | 1159 | — |
| LiveBench Coding | — | 48% |
| HumanEval+ | — | 89% |
| MBPP+ | — | 78.8% |
Agentic & Tool Use Grok 4 Fast leads
Grok 4 Fast: 29.5 (#86), o1-mini: 24.6 (#118)
| Benchmark | Grok 4 Fast | o1-mini |
|---|---|---|
| Cybench | 30% | 10% |
| τ²-bench Banking | 15.7% | — |
| LMArena Search | 1171 | — |
Reasoning Grok 4 Fast leads
Grok 4 Fast: 22.2 (#201), o1-mini: 8.8 (#346)
| Benchmark | Grok 4 Fast | o1-mini |
|---|---|---|
| ARC-AGI-2 | 5.3% | 0.8% |
| ARC-AGI-1 | 48.5% | 14% |
| LMArena Hard Prompts | 1412 | 1333 |
| Epoch Capabilities Index | 144.2 | 135.82 |
| SimpleBench | — | 18.1% |
| Kagi LLM Benchmark | 66.1% | — |
| LiveBench Reasoning | — | 72.3% |
| DTBench | 82.7% | — |
| LiveBench Data Analysis | — | 57.9% |
| ForecastBench | 60.5 | — |
| LiveBench | — | 57.8% |
Math Grok 4 Fast leads
Grok 4 Fast: 38.9 (#123), o1-mini: 35.4 (#186)
| Benchmark | Grok 4 Fast | o1-mini |
|---|---|---|
| LMArena Math | 1419 | 1358 |
| OTIS Mock AIME 2024-2025 | — | 46.9% |
| LiveBench Math | — | 62% |
| MATH Level 5 | — | 89.2% |
| FrontierMath (Feb 2025 set) | — | 1.7% |
Knowledge o1-mini leads
Grok 4 Fast: 32.0 (#214), o1-mini: 34.9 (#192)
| Benchmark | Grok 4 Fast | o1-mini |
|---|---|---|
| LMArena Expert | 1411 | 1316 |
| GPQA Diamond | — | 62.4% |
| Confabulations | — | 18.6% |
| Vectara Hallucination Rate | 19.7% | — |
Multilingual Grok 4 Fast leads
Grok 4 Fast: 51.3 (#111), o1-mini: 43.6 (#182)
| Benchmark | Grok 4 Fast | o1-mini |
|---|---|---|
| LMArena Non-English | 1396 | 1289 |
| LMArena Chinese | 1457 | 1314 |
| LMArena French | 1431 | 1293 |
| LMArena German | 1383 | 1278 |
| LMArena Japanese | 1352 | 1245 |
| LMArena Korean | 1357 | 1223 |
| LMArena Russian | 1389 | 1283 |
| LMArena Spanish | 1415 | 1303 |
Instruction Following Grok 4 Fast leads
Grok 4 Fast: 73.2 (#121), o1-mini: 66.7 (#206)
| Benchmark | Grok 4 Fast | o1-mini |
|---|---|---|
| LMArena Instruction Following | 1387 | 1304 |
| LiveBench Instruction Following | — | 65.4% |
Long Context Grok 4 Fast leads
Grok 4 Fast: 63.2 (#3), o1-mini: 40.1 (#161)
| Benchmark | Grok 4 Fast | o1-mini |
|---|---|---|
| LMArena Longer Query | 1415 | 1320 |
| Fiction.LiveBench | 94.4% | — |
Writing & Preference Grok 4 Fast leads
Grok 4 Fast: 60.0 (#102), o1-mini: 48.4 (#202)
| Benchmark | Grok 4 Fast | o1-mini |
|---|---|---|
| LMArena Text | 1407 | 1317 |
| LMArena Creative Writing | 1387 | 1244 |
| LMArena Multi-Turn | 1414 | 1314 |
| Short-Story Creative Writing | — | 64.9% |
| LiveBench Language | — | 40.9% |
Frequently asked questions
Is Grok 4 Fast better than o1-mini?
Grok 4 Fast is the stronger model overall, scoring 39.4 to 34.0 on the Noometry Index.
Is Grok 4 Fast or o1-mini better for coding?
o1-mini scores higher on coding benchmarks: 35.5 versus 32.5 in the Noometry coding category.
How many benchmarks do Grok 4 Fast and o1-mini share?
22 benchmarks have published results for both models. Grok 4 Fast has 30 scored results on Noometry and o1-mini has 39.