Model comparison
Grok 4 Fast vs OLMo 2 Furious 13B
Grok 4 Fast is the stronger model overall, scoring 39.0 to 29.2 on the Noometry Index.
Last verified . 0 shared benchmarks.
Allen Institute for AI (Ai2)Summary
- The widest gap is in writing & preference, where Grok 4 Fast leads 60.2 to 43.0.
- OLMo 2 Furious 13B has downloadable open weights; the other is API-only.
Side by side
| Grok 4 Fast | OLMo 2 Furious 13B | |
|---|---|---|
| Provider | xAI | Allen Institute for AI (Ai2) |
| Noometry Index | 39.0 | 29.2 |
| Released | 2025-09-19 | 2024-12-31 |
| Weights | Proprietary | Open |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 30 | 12 |
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Category by category
Coding Grok 4 Fast leads
Grok 4 Fast: 32.3 (#264), OLMo 2 Furious 13B: 28.1 (#309)
| Benchmark | Grok 4 Fast | OLMo 2 Furious 13B |
|---|---|---|
| LMArena WebDev | 1160 | — |
| WeirdML | 42.9% | — |
| LiveBench Coding | — | 10.4% |
| LMArena Coding | 1429 | — |
Agentic & Tool Use Not comparable
Grok 4 Fast: 29.3 (#80), OLMo 2 Furious 13B: —
| Benchmark | Grok 4 Fast | OLMo 2 Furious 13B |
|---|---|---|
| τ²-bench Banking | 15.7% | — |
| Cybench | 30% | — |
| LMArena Search | 1171 | — |
Reasoning Grok 4 Fast leads
Grok 4 Fast: 22.5 (#179), OLMo 2 Furious 13B: 14.8 (#312)
| Benchmark | Grok 4 Fast | OLMo 2 Furious 13B |
|---|---|---|
| ARC-AGI-2 | 5.3% | — |
| Kagi LLM Benchmark | 66.1% | — |
| ARC-AGI-1 | 48.5% | — |
| LiveBench Reasoning | — | 16.3% |
| LMArena Hard Prompts | 1413 | — |
| DTBench | 82.7% | — |
| LiveBench Data Analysis | — | 20.6% |
| Epoch Capabilities Index | 144.21 | — |
| ForecastBench | 60.5 | — |
| LiveBench | — | 22.1% |
Math Grok 4 Fast leads
Grok 4 Fast: 36.1 (#126), OLMo 2 Furious 13B: 21.3 (#270)
| Benchmark | Grok 4 Fast | OLMo 2 Furious 13B |
|---|---|---|
| Omni-MATH | — | 15.6% |
| LiveBench Math | — | 13.6% |
| LMArena Math | 1419 | — |
Knowledge Grok 4 Fast leads
Grok 4 Fast: 31.5 (#211), OLMo 2 Furious 13B: 18.0 (#278)
| Benchmark | Grok 4 Fast | OLMo 2 Furious 13B |
|---|---|---|
| MMLU-Pro | — | 31% |
| Vectara Hallucination Rate | 19.7% | — |
| GPQA (HELM) | — | 31.6% |
| LMArena Expert | 1411 | — |
Multilingual Not comparable
Grok 4 Fast: 51.5 (#106), OLMo 2 Furious 13B: —
| Benchmark | Grok 4 Fast | OLMo 2 Furious 13B |
|---|---|---|
| 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 Grok 4 Fast leads
Grok 4 Fast: 73.4 (#116), OLMo 2 Furious 13B: 61.1 (#243)
| Benchmark | Grok 4 Fast | OLMo 2 Furious 13B |
|---|---|---|
| LiveBench Instruction Following | — | 60.6% |
| IFEval | — | 73% |
| LMArena Instruction Following | 1388 | — |
Long Context Not comparable
Grok 4 Fast: 63.2 (#3), OLMo 2 Furious 13B: —
| Benchmark | Grok 4 Fast | OLMo 2 Furious 13B |
|---|---|---|
| Fiction.LiveBench | 94.4% | — |
| LMArena Longer Query | 1415 | — |
Writing & Preference Grok 4 Fast leads
Grok 4 Fast: 60.2 (#96), OLMo 2 Furious 13B: 43.0 (#226)
| Benchmark | Grok 4 Fast | OLMo 2 Furious 13B |
|---|---|---|
| LMArena Text | 1407 | — |
| LMArena Creative Writing | 1388 | — |
| WildBench | — | 68.9% |
| LMArena Multi-Turn | 1414 | — |
| LiveBench Language | — | 11.2% |
Frequently asked questions
Is Grok 4 Fast better than OLMo 2 Furious 13B?
Grok 4 Fast is the stronger model overall, scoring 39.0 to 29.2 on the Noometry Index.
Is Grok 4 Fast or OLMo 2 Furious 13B better for coding?
Grok 4 Fast scores higher on coding benchmarks: 32.3 versus 28.1 in the Noometry coding category.
How many benchmarks do Grok 4 Fast and OLMo 2 Furious 13B share?
0 benchmarks have published results for both models. Grok 4 Fast has 30 scored results on Noometry and OLMo 2 Furious 13B has 12.