Model comparison
Grok-2 (Dec 2024) vs Step 5 Preview
Step 5 Preview is the stronger model overall, scoring 47.9 to 33.7 on the Noometry Index.
Last verified . 13 shared benchmarks.
StepFunSummary
- They share 13 benchmarks with published results for both. Grok-2 (Dec 2024) scores higher in 0 categories and Step 5 Preview in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Step 5 Preview leads 46.1 to 20.8.
Side by side
| Grok-2 (Dec 2024) | Step 5 Preview | |
|---|---|---|
| Provider | xAI | StepFun |
| Noometry Index | 33.7 | 47.9 |
| Released | 2024-08-13 | 2026-09-16 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1.02M |
| Max output | — | 66K |
| Input $ / M tokens | — | $1 |
| Output $ / M tokens | — | $2.70 |
| Results tracked | 34 | 18 |
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Category by category
Coding Step 5 Preview leads
Grok-2 (Dec 2024): 33.3 (#258), Step 5 Preview: 51.8 (#36)
| Benchmark | Grok-2 (Dec 2024) | Step 5 Preview |
|---|---|---|
| LMArena Coding | 1287 | 1480 |
| LMArena WebDev | — | 1564 |
| SciCode | — | 58.9% |
| WeirdML | 22.2% | — |
| LiveBench Coding | 46.4% | — |
Reasoning Step 5 Preview leads
Grok-2 (Dec 2024): 16.9 (#299), Step 5 Preview: 40.0 (#57)
| Benchmark | Grok-2 (Dec 2024) | Step 5 Preview |
|---|---|---|
| LMArena Hard Prompts | 1272 | 1465 |
| SimpleBench | 22.7% | — |
| CritPt | — | 20.9% |
| LiveBench Reasoning | 54.8% | — |
| DTBench | 65.2% | — |
| LiveBench Data Analysis | 54.5% | — |
| Epoch Capabilities Index | 130.48 | — |
| LiveBench | 54.3% | — |
Math Step 5 Preview leads
Grok-2 (Dec 2024): 20.8 (#284), Step 5 Preview: 46.1 (#72)
| Benchmark | Grok-2 (Dec 2024) | Step 5 Preview |
|---|---|---|
| LMArena Math | 1283 | 1470 |
| OTIS Mock AIME 2024-2025 | 11.5% | — |
| ProofBench | — | 42% |
| LiveBench Math | 54.9% | — |
| MATH Level 5 | 63.5% | — |
| FrontierMath (Feb 2025 set) | 0.7% | — |
Knowledge Step 5 Preview leads
Grok-2 (Dec 2024): 29.8 (#233), Step 5 Preview: 41.2 (#112)
| Benchmark | Grok-2 (Dec 2024) | Step 5 Preview |
|---|---|---|
| LMArena Expert | 1254 | 1470 |
| GPQA Diamond | 53.8% | — |
| Confabulations | 20.1% | — |
Multimodal Not comparable
Grok-2 (Dec 2024): —, Step 5 Preview: 41.0 (#41)
| Benchmark | Grok-2 (Dec 2024) | Step 5 Preview |
|---|---|---|
| LMArena Vision | — | 1267 |
Multilingual Step 5 Preview leads
Grok-2 (Dec 2024): 43.1 (#188), Step 5 Preview: 53.8 (#54)
| Benchmark | Grok-2 (Dec 2024) | Step 5 Preview |
|---|---|---|
| LMArena Non-English | 1282 | 1432 |
| LMArena Chinese | 1289 | 1519 |
| LMArena Russian | 1286 | 1436 |
| LMArena Spanish | 1281 | 1439 |
| LMArena French | 1318 | — |
| LMArena German | 1287 | — |
| LMArena Japanese | 1244 | — |
| LMArena Korean | 1237 | — |
Instruction Following Step 5 Preview leads
Grok-2 (Dec 2024): 66.9 (#202), Step 5 Preview: 76.0 (#50)
| Benchmark | Grok-2 (Dec 2024) | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | 1270 | 1444 |
| LiveBench Instruction Following | 69.6% | — |
Long Context Step 5 Preview leads
Grok-2 (Dec 2024): 38.8 (#190), Step 5 Preview: 44.5 (#64)
| Benchmark | Grok-2 (Dec 2024) | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | 1276 | 1455 |
Writing & Preference Step 5 Preview leads
Grok-2 (Dec 2024): 48.6 (#198), Step 5 Preview: 62.8 (#71)
| Benchmark | Grok-2 (Dec 2024) | Step 5 Preview |
|---|---|---|
| LMArena Text | 1305 | 1442 |
| LMArena Creative Writing | 1284 | 1410 |
| LMArena Multi-Turn | 1290 | 1447 |
| Short-Story Creative Writing | 63.6% | — |
| LiveBench Language | 45.6% | — |
Frequently asked questions
Is Grok-2 (Dec 2024) better than Step 5 Preview?
Step 5 Preview is the stronger model overall, scoring 47.9 to 33.7 on the Noometry Index.
Is Grok-2 (Dec 2024) or Step 5 Preview better for coding?
Step 5 Preview scores higher on coding benchmarks: 51.8 versus 33.3 in the Noometry coding category.
How many benchmarks do Grok-2 (Dec 2024) and Step 5 Preview share?
13 benchmarks have published results for both models. Grok-2 (Dec 2024) has 34 scored results on Noometry and Step 5 Preview has 18.