Model comparison
Grok 4.1 vs Step 5 Preview
Step 5 Preview is the stronger model overall, scoring 43.8 to 40.8 on the Noometry Index.
Last verified . 1 shared benchmarks.
StepFunSummary
- They share 1 benchmark with published results for both. Grok 4.1 scores higher in 0 categories and Step 5 Preview in 2 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in coding, where Step 5 Preview leads 50.6 to 33.4.
Side by side
| Grok 4.1 | Step 5 Preview | |
|---|---|---|
| Provider | xAI | StepFun |
| Noometry Index | 40.8 | 43.8 |
| 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 | 3 |
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Category by category
Coding Step 5 Preview leads
Grok 4.1: 33.4 (#246), Step 5 Preview: 50.6 (#40)
| Benchmark | Grok 4.1 | Step 5 Preview |
|---|---|---|
| LMArena WebDev | 1214 | 1569 |
| SciCode | — | 58.9% |
| LMArena Coding | 1445 | — |
Agentic & Tool Use Not comparable
Grok 4.1: 33.8 (#47), Step 5 Preview: —
| Benchmark | Grok 4.1 | Step 5 Preview |
|---|---|---|
| Cybench | 39% | — |
Reasoning Step 5 Preview leads
Grok 4.1: 28.3 (#91), Step 5 Preview: 38.0 (#58)
| Benchmark | Grok 4.1 | Step 5 Preview |
|---|---|---|
| CritPt | — | 20.9% |
| LMArena Hard Prompts | 1436 | — |
Math Not comparable
Grok 4.1: 36.2 (#124), Step 5 Preview: —
| Benchmark | Grok 4.1 | Step 5 Preview |
|---|---|---|
| LMArena Math | 1422 | — |
Knowledge Not comparable
Grok 4.1: 38.9 (#129), Step 5 Preview: —
| Benchmark | Grok 4.1 | Step 5 Preview |
|---|---|---|
| LMArena Expert | 1417 | — |
Multilingual Not comparable
Grok 4.1: 53.6 (#64), Step 5 Preview: —
| Benchmark | Grok 4.1 | Step 5 Preview |
|---|---|---|
| LMArena Non-English | 1425 | — |
| LMArena Chinese | 1464 | — |
| LMArena French | 1448 | — |
| LMArena German | 1447 | — |
| LMArena Japanese | 1396 | — |
| LMArena Korean | 1407 | — |
| LMArena Russian | 1434 | — |
| LMArena Spanish | 1438 | — |
Instruction Following Not comparable
Grok 4.1: 74.0 (#106), Step 5 Preview: —
| Benchmark | Grok 4.1 | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | 1400 | — |
Long Context Not comparable
Grok 4.1: 43.2 (#96), Step 5 Preview: —
| Benchmark | Grok 4.1 | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | 1416 | — |
Writing & Preference Not comparable
Grok 4.1: 62.6 (#71), Step 5 Preview: —
| Benchmark | Grok 4.1 | Step 5 Preview |
|---|---|---|
| LMArena Text | 1437 | — |
| LMArena Creative Writing | 1411 | — |
| LMArena Multi-Turn | 1438 | — |
Frequently asked questions
Is Grok 4.1 better than Step 5 Preview?
Step 5 Preview is the stronger model overall, scoring 43.8 to 40.8 on the Noometry Index.
Is Grok 4.1 or Step 5 Preview better for coding?
Step 5 Preview scores higher on coding benchmarks: 50.6 versus 33.4 in the Noometry coding category.
How many benchmarks do Grok 4.1 and Step 5 Preview share?
1 benchmark has published results for both models. Grok 4.1 has 19 scored results on Noometry and Step 5 Preview has 3.