Model comparison
Grok 4.1 vs Step 5 Preview
Step 5 Preview is the stronger model overall, scoring 47.9 to 41.5 on the Noometry Index.
Last verified . 14 shared benchmarks.
StepFunSummary
- They share 14 benchmarks with published results for both. Grok 4.1 scores higher in 0 categories and Step 5 Preview in 8 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in coding, where Step 5 Preview leads 51.8 to 33.7.
Side by side
| Grok 4.1 | Step 5 Preview | |
|---|---|---|
| Provider | xAI | StepFun |
| Noometry Index | 41.5 | 47.9 |
| Released | 2025-11-17 | 2026-09-16 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1.02M |
| Max output | — | 66K |
| Input $ / M tokens | — | $1 |
| Output $ / M tokens | — | $2.70 |
| Results tracked | 19 | 18 |
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Category by category
Coding Step 5 Preview leads
Grok 4.1: 33.7 (#253), Step 5 Preview: 51.8 (#36)
| Benchmark | Grok 4.1 | Step 5 Preview |
|---|---|---|
| LMArena WebDev | 1214 | 1564 |
| LMArena Coding | 1445 | 1480 |
| SciCode | — | 58.9% |
Agentic & Tool Use Not comparable
Grok 4.1: 34.1 (#49), Step 5 Preview: —
| Benchmark | Grok 4.1 | Step 5 Preview |
|---|---|---|
| Cybench | 39% | — |
Reasoning Step 5 Preview leads
Grok 4.1: 29.5 (#91), Step 5 Preview: 40.0 (#57)
| Benchmark | Grok 4.1 | Step 5 Preview |
|---|---|---|
| LMArena Hard Prompts | 1435 | 1465 |
| CritPt | — | 20.9% |
Math Step 5 Preview leads
Grok 4.1: 38.9 (#120), Step 5 Preview: 46.1 (#72)
| Benchmark | Grok 4.1 | Step 5 Preview |
|---|---|---|
| LMArena Math | 1422 | 1470 |
| ProofBench | — | 42% |
Knowledge Step 5 Preview leads
Grok 4.1: 39.5 (#133), Step 5 Preview: 41.2 (#112)
| Benchmark | Grok 4.1 | Step 5 Preview |
|---|---|---|
| LMArena Expert | 1417 | 1470 |
Multimodal Not comparable
Grok 4.1: —, Step 5 Preview: 41.0 (#41)
| Benchmark | Grok 4.1 | Step 5 Preview |
|---|---|---|
| LMArena Vision | — | 1267 |
Multilingual Too close to call
Grok 4.1: 53.4 (#68), Step 5 Preview: 53.8 (#54)
| Benchmark | Grok 4.1 | Step 5 Preview |
|---|---|---|
| LMArena Non-English | 1425 | 1432 |
| LMArena Chinese | 1465 | 1519 |
| LMArena Russian | 1434 | 1436 |
| LMArena Spanish | 1438 | 1439 |
| LMArena French | 1448 | — |
| LMArena German | 1446 | — |
| LMArena Japanese | 1397 | — |
| LMArena Korean | 1407 | — |
Instruction Following Step 5 Preview leads
Grok 4.1: 73.8 (#111), Step 5 Preview: 76.0 (#50)
| Benchmark | Grok 4.1 | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | 1400 | 1444 |
Long Context Step 5 Preview leads
Grok 4.1: 43.2 (#100), Step 5 Preview: 44.5 (#64)
| Benchmark | Grok 4.1 | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | 1416 | 1455 |
Writing & Preference Too close to call
Grok 4.1: 62.4 (#75), Step 5 Preview: 62.8 (#71)
| Benchmark | Grok 4.1 | Step 5 Preview |
|---|---|---|
| LMArena Text | 1437 | 1442 |
| LMArena Creative Writing | 1411 | 1410 |
| LMArena Multi-Turn | 1437 | 1447 |
Frequently asked questions
Is Grok 4.1 better than Step 5 Preview?
Step 5 Preview is the stronger model overall, scoring 47.9 to 41.5 on the Noometry Index.
Is Grok 4.1 or Step 5 Preview better for coding?
Step 5 Preview scores higher on coding benchmarks: 51.8 versus 33.7 in the Noometry coding category.
How many benchmarks do Grok 4.1 and Step 5 Preview share?
14 benchmarks have published results for both models. Grok 4.1 has 19 scored results on Noometry and Step 5 Preview has 18.