Model comparison
Grok 4 Fast vs o1-pro
Grok 4 Fast is the stronger model overall, scoring 39.0 to 31.2 on the Noometry Index.
Last verified . 1 shared benchmarks.
Summary
- They share 1 benchmark with published results for both. Grok 4 Fast scores higher in 2 categories and o1-pro in 0 categories; 2 gaps are clear of the uncertainty.
- The biggest single-benchmark swing is ARC-AGI-1: 48.5% for Grok 4 Fast and 23.3% for o1-pro.
Side by side
| Grok 4 Fast | o1-pro | |
|---|---|---|
| Provider | xAI | OpenAI |
| Noometry Index | 39.0 | 31.2 |
| Released | 2025-09-19 | 2025-03-19 |
| Weights | Proprietary | Proprietary |
| Context window | — | 200K |
| Max output | — | 100K |
| Input $ / M tokens | — | $150 |
| Output $ / M tokens | — | $600 |
| Results tracked | 30 | 3 |
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Category by category
Coding Not comparable
Grok 4 Fast: 32.3 (#264), o1-pro: —
| Benchmark | Grok 4 Fast | o1-pro |
|---|---|---|
| LMArena WebDev | 1160 | — |
| WeirdML | 42.9% | — |
| LMArena Coding | 1429 | — |
Agentic & Tool Use Not comparable
Grok 4 Fast: 29.3 (#80), o1-pro: —
| Benchmark | Grok 4 Fast | o1-pro |
|---|---|---|
| τ²-bench Banking | 15.7% | — |
| Cybench | 30% | — |
| LMArena Search | 1171 | — |
Reasoning Grok 4 Fast leads
Grok 4 Fast: 22.5 (#179), o1-pro: 20.2 (#223)
| Benchmark | Grok 4 Fast | o1-pro |
|---|---|---|
| ARC-AGI-1 | 48.5% | 23.3% |
| ARC-AGI-2 | 5.3% | — |
| Kagi LLM Benchmark | 66.1% | — |
| EnigmaEval | — | 6.1% |
| LMArena Hard Prompts | 1413 | — |
| DTBench | 82.7% | — |
| Epoch Capabilities Index | 144.21 | — |
| ForecastBench | 60.5 | — |
Math Not comparable
Grok 4 Fast: 36.1 (#126), o1-pro: —
| Benchmark | Grok 4 Fast | o1-pro |
|---|---|---|
| LMArena Math | 1419 | — |
Knowledge Grok 4 Fast leads
Grok 4 Fast: 31.5 (#211), o1-pro: 29.3 (#227)
| Benchmark | Grok 4 Fast | o1-pro |
|---|---|---|
| Humanity's Last Exam | — | 8.1% |
| Vectara Hallucination Rate | 19.7% | — |
| LMArena Expert | 1411 | — |
Multilingual Not comparable
Grok 4 Fast: 51.5 (#106), o1-pro: —
| Benchmark | Grok 4 Fast | o1-pro |
|---|---|---|
| LMArena Non-English | 1397 | — |
| LMArena Chinese | 1458 | — |
| LMArena French | 1433 | — |
| LMArena German | 1383 | — |
| LMArena Japanese | 1358 | — |
| LMArena Korean | 1359 | — |
| LMArena Russian | 1387 | — |
| LMArena Spanish | 1414 | — |
Instruction Following Not comparable
Grok 4 Fast: 73.4 (#116), o1-pro: —
| Benchmark | Grok 4 Fast | o1-pro |
|---|---|---|
| LMArena Instruction Following | 1388 | — |
Long Context Not comparable
Grok 4 Fast: 63.2 (#3), o1-pro: —
| Benchmark | Grok 4 Fast | o1-pro |
|---|---|---|
| Fiction.LiveBench | 94.4% | — |
| LMArena Longer Query | 1415 | — |
Writing & Preference Not comparable
Grok 4 Fast: 60.2 (#96), o1-pro: —
| Benchmark | Grok 4 Fast | o1-pro |
|---|---|---|
| LMArena Text | 1407 | — |
| LMArena Creative Writing | 1388 | — |
| LMArena Multi-Turn | 1414 | — |
Frequently asked questions
Is Grok 4 Fast better than o1-pro?
Grok 4 Fast is the stronger model overall, scoring 39.0 to 31.2 on the Noometry Index.
How many benchmarks do Grok 4 Fast and o1-pro share?
1 benchmark has published results for both models. Grok 4 Fast has 30 scored results on Noometry and o1-pro has 3.