Model comparison
Grok-3 mini vs Step 5 Preview
Step 5 Preview is the stronger model overall, scoring 43.8 to 41.0 on the Noometry Index.
Last verified . 0 shared benchmarks.
StepFunSummary
- The widest gap is in reasoning, where Step 5 Preview leads 38.0 to 13.8.
Side by side
| Grok-3 mini | Step 5 Preview | |
|---|---|---|
| Provider | xAI | StepFun |
| Noometry Index | 41.0 | 43.8 |
| Released | 2025-04-09 | 2026-09-16 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1.02M |
| Max output | — | 66K |
| Input $ / M tokens | — | $1 |
| Output $ / M tokens | — | $2.70 |
| Results tracked | 35 | 3 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Step 5 Preview leads
Grok-3 mini: 40.4 (#126), Step 5 Preview: 50.6 (#40)
| Benchmark | Grok-3 mini | Step 5 Preview |
|---|---|---|
| Aider Polyglot | 49.3% | — |
| LMArena WebDev | — | 1569 |
| SciCode | — | 58.9% |
| WeirdML | 42.6% | — |
| LMArena Coding | 1380 | — |
Reasoning Step 5 Preview leads
Grok-3 mini: 13.8 (#323), Step 5 Preview: 38.0 (#58)
| Benchmark | Grok-3 mini | Step 5 Preview |
|---|---|---|
| ARC-AGI-2 | 0.4% | — |
| Kagi LLM Benchmark | 61.3% | — |
| ARC-AGI-1 | 16.5% | — |
| CritPt | — | 20.9% |
| LMArena Hard Prompts | 1374 | — |
| Epoch Capabilities Index | 140.35 | — |
Math Not comparable
Grok-3 mini: 40.3 (#78), Step 5 Preview: —
| Benchmark | Grok-3 mini | Step 5 Preview |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 77.8% | — |
| Omni-MATH | 31.8% | — |
| LMArena Math | 1386 | — |
| MATH Level 5 | 90.9% | — |
| FrontierMath (Feb 2025 set) | 5.9% | — |
Knowledge Not comparable
Grok-3 mini: 46.3 (#75), Step 5 Preview: —
| Benchmark | Grok-3 mini | Step 5 Preview |
|---|---|---|
| GPQA Diamond | 76.3% | — |
| MMLU-Pro | 79.9% | — |
| Confabulations | 10.8% | — |
| GPQA (HELM) | 67.5% | — |
| LMArena Expert | 1395 | — |
Multilingual Not comparable
Grok-3 mini: 48.3 (#141), Step 5 Preview: —
| Benchmark | Grok-3 mini | Step 5 Preview |
|---|---|---|
| LMArena Non-English | 1352 | — |
| LMArena Chinese | 1387 | — |
| LMArena French | 1357 | — |
| LMArena German | 1350 | — |
| LMArena Japanese | 1343 | — |
| LMArena Korean | 1336 | — |
| LMArena Russian | 1352 | — |
| LMArena Spanish | 1379 | — |
Instruction Following Not comparable
Grok-3 mini: 78.7 (#8), Step 5 Preview: —
| Benchmark | Grok-3 mini | Step 5 Preview |
|---|---|---|
| IFEval | 95.1% | — |
| LMArena Instruction Following | 1356 | — |
Long Context Not comparable
Grok-3 mini: 41.0 (#142), Step 5 Preview: —
| Benchmark | Grok-3 mini | Step 5 Preview |
|---|---|---|
| Fiction.LiveBench | 66.7% | — |
| LMArena Longer Query | 1372 | — |
Writing & Preference Not comparable
Grok-3 mini: 52.7 (#163), Step 5 Preview: —
| Benchmark | Grok-3 mini | Step 5 Preview |
|---|---|---|
| LMArena Text | 1370 | — |
| LMArena Creative Writing | 1342 | — |
| Short-Story Creative Writing | 73.5% | — |
| WildBench | 65.1% | — |
| LMArena Multi-Turn | 1355 | — |
Frequently asked questions
Is Grok-3 mini better than Step 5 Preview?
Step 5 Preview is the stronger model overall, scoring 43.8 to 41.0 on the Noometry Index.
Is Grok-3 mini or Step 5 Preview better for coding?
Step 5 Preview scores higher on coding benchmarks: 50.6 versus 40.4 in the Noometry coding category.
How many benchmarks do Grok-3 mini and Step 5 Preview share?
0 benchmarks have published results for both models. Grok-3 mini has 35 scored results on Noometry and Step 5 Preview has 3.