Model comparison
Grok 4 Fast vs Olmo 3 32b Think
Grok 4 Fast and Olmo 3 32b Think score almost the same on the Noometry Index (39.4 vs 38.7), so choose on price, context window or the category you care about most.
Last verified . 14 shared benchmarks.
Allen Institute for AI (Ai2)Summary
- They share 14 benchmarks with published results for both. Grok 4 Fast scores higher in 5 categories and Olmo 3 32b Think in 3 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in long context, where Grok 4 Fast leads 63.2 to 39.4.
- Olmo 3 32b Think has downloadable open weights; the other is API-only.
Side by side
| Grok 4 Fast | Olmo 3 32b Think | |
|---|---|---|
| Provider | xAI | Allen Institute for AI (Ai2) |
| Noometry Index | 39.4 | 38.7 |
| Released | 2025-09-19 | — |
| Weights | Proprietary | Open |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 30 | 14 |
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Category by category
Coding Olmo 3 32b Think leads
Grok 4 Fast: 32.5 (#271), Olmo 3 32b Think: 38.6 (#172)
| Benchmark | Grok 4 Fast | Olmo 3 32b Think |
|---|---|---|
| LMArena Coding | 1429 | 1319 |
| LMArena WebDev | 1159 | — |
| WeirdML | 42.9% | — |
Agentic & Tool Use Not comparable
Grok 4 Fast: 29.5 (#86), Olmo 3 32b Think: —
| Benchmark | Grok 4 Fast | Olmo 3 32b Think |
|---|---|---|
| τ²-bench Banking | 15.7% | — |
| Cybench | 30% | — |
| LMArena Search | 1171 | — |
Reasoning Olmo 3 32b Think leads
Grok 4 Fast: 22.2 (#201), Olmo 3 32b Think: 25.9 (#140)
| Benchmark | Grok 4 Fast | Olmo 3 32b Think |
|---|---|---|
| LMArena Hard Prompts | 1412 | 1302 |
| ARC-AGI-2 | 5.3% | — |
| Kagi LLM Benchmark | 66.1% | — |
| ARC-AGI-1 | 48.5% | — |
| DTBench | 82.7% | — |
| Epoch Capabilities Index | 144.2 | — |
| ForecastBench | 60.5 | — |
Math Grok 4 Fast leads
Grok 4 Fast: 38.9 (#123), Olmo 3 32b Think: 36.5 (#165)
| Benchmark | Grok 4 Fast | Olmo 3 32b Think |
|---|---|---|
| LMArena Math | 1419 | 1316 |
Knowledge Olmo 3 32b Think leads
Grok 4 Fast: 32.0 (#214), Olmo 3 32b Think: 35.0 (#190)
| Benchmark | Grok 4 Fast | Olmo 3 32b Think |
|---|---|---|
| LMArena Expert | 1411 | 1273 |
| Vectara Hallucination Rate | 19.7% | — |
Multilingual Grok 4 Fast leads
Grok 4 Fast: 51.3 (#111), Olmo 3 32b Think: 41.2 (#210)
| Benchmark | Grok 4 Fast | Olmo 3 32b Think |
|---|---|---|
| LMArena Non-English | 1396 | 1255 |
| LMArena Chinese | 1457 | 1300 |
| LMArena French | 1431 | 1291 |
| LMArena German | 1383 | 1290 |
| LMArena Russian | 1389 | 1254 |
| LMArena Japanese | 1352 | — |
| LMArena Korean | 1357 | — |
| LMArena Spanish | 1415 | — |
Instruction Following Grok 4 Fast leads
Grok 4 Fast: 73.2 (#121), Olmo 3 32b Think: 67.2 (#198)
| Benchmark | Grok 4 Fast | Olmo 3 32b Think |
|---|---|---|
| LMArena Instruction Following | 1387 | 1275 |
Long Context Grok 4 Fast leads
Grok 4 Fast: 63.2 (#3), Olmo 3 32b Think: 39.4 (#182)
| Benchmark | Grok 4 Fast | Olmo 3 32b Think |
|---|---|---|
| LMArena Longer Query | 1415 | 1296 |
| Fiction.LiveBench | 94.4% | — |
Writing & Preference Grok 4 Fast leads
Grok 4 Fast: 60.0 (#102), Olmo 3 32b Think: 49.1 (#193)
| Benchmark | Grok 4 Fast | Olmo 3 32b Think |
|---|---|---|
| LMArena Text | 1407 | 1300 |
| LMArena Creative Writing | 1387 | 1256 |
| LMArena Multi-Turn | 1414 | 1290 |
Frequently asked questions
Is Grok 4 Fast better than Olmo 3 32b Think?
Grok 4 Fast and Olmo 3 32b Think score almost the same on the Noometry Index (39.4 vs 38.7), so choose on price, context window or the category you care about most.
Is Grok 4 Fast or Olmo 3 32b Think better for coding?
Olmo 3 32b Think scores higher on coding benchmarks: 38.6 versus 32.5 in the Noometry coding category.
How many benchmarks do Grok 4 Fast and Olmo 3 32b Think share?
14 benchmarks have published results for both models. Grok 4 Fast has 30 scored results on Noometry and Olmo 3 32b Think has 14.