Model comparison
Claude 2.1 vs Step 5 Preview
Step 5 Preview is the stronger model overall, scoring 47.9 to 25.2 on the Noometry Index.
Last verified . 0 shared benchmarks.
StepFunSummary
- The widest gap is in math, where Step 5 Preview leads 46.1 to 10.2.
Side by side
| Claude 2.1 | Step 5 Preview | |
|---|---|---|
| Provider | Anthropic | StepFun |
| Noometry Index | 25.2 | 47.9 |
| Released | 2023-11-21 | 2026-09-16 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1.02M |
| Max output | — | 66K |
| Input $ / M tokens | — | $1 |
| Output $ / M tokens | — | $2.70 |
| Results tracked | 7 | 18 |
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Category by category
Coding Step 5 Preview leads
Claude 2.1: 26.2 (#327), Step 5 Preview: 51.8 (#36)
| Benchmark | Claude 2.1 | Step 5 Preview |
|---|---|---|
| LMArena WebDev | — | 1564 |
| SciCode | — | 58.9% |
| WeirdML | 7.1% | — |
| LMArena Coding | — | 1480 |
Reasoning Step 5 Preview leads
Claude 2.1: 21.4 (#221), Step 5 Preview: 40.0 (#57)
| Benchmark | Claude 2.1 | Step 5 Preview |
|---|---|---|
| CritPt | — | 20.9% |
| LMArena Hard Prompts | — | 1465 |
| DTBench | 51% | — |
| Epoch Capabilities Index | 119.27 | — |
| ForecastBench | 54.2 | — |
Math Step 5 Preview leads
Claude 2.1: 10.2 (#315), Step 5 Preview: 46.1 (#72)
| Benchmark | Claude 2.1 | Step 5 Preview |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.9% | — |
| ProofBench | — | 42% |
| LMArena Math | — | 1470 |
Knowledge Step 5 Preview leads
Claude 2.1: 15.4 (#292), Step 5 Preview: 41.2 (#112)
| Benchmark | Claude 2.1 | Step 5 Preview |
|---|---|---|
| GPQA Diamond | 33% | — |
| LMArena Expert | — | 1470 |
| MMLU | 73.5% | — |
Multimodal Not comparable
Claude 2.1: —, Step 5 Preview: 41.0 (#41)
| Benchmark | Claude 2.1 | Step 5 Preview |
|---|---|---|
| LMArena Vision | — | 1267 |
Multilingual Not comparable
Claude 2.1: —, Step 5 Preview: 53.8 (#54)
| Benchmark | Claude 2.1 | Step 5 Preview |
|---|---|---|
| LMArena Non-English | — | 1432 |
| LMArena Chinese | — | 1519 |
| LMArena Russian | — | 1436 |
| LMArena Spanish | — | 1439 |
Instruction Following Not comparable
Claude 2.1: —, Step 5 Preview: 76.0 (#50)
| Benchmark | Claude 2.1 | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | — | 1444 |
Long Context Not comparable
Claude 2.1: —, Step 5 Preview: 44.5 (#64)
| Benchmark | Claude 2.1 | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | — | 1455 |
Writing & Preference Not comparable
Claude 2.1: —, Step 5 Preview: 62.8 (#71)
| Benchmark | Claude 2.1 | Step 5 Preview |
|---|---|---|
| LMArena Text | — | 1442 |
| LMArena Creative Writing | — | 1410 |
| LMArena Multi-Turn | — | 1447 |
Frequently asked questions
Is Claude 2.1 better than Step 5 Preview?
Step 5 Preview is the stronger model overall, scoring 47.9 to 25.2 on the Noometry Index.
Is Claude 2.1 or Step 5 Preview better for coding?
Step 5 Preview scores higher on coding benchmarks: 51.8 versus 26.2 in the Noometry coding category.
How many benchmarks do Claude 2.1 and Step 5 Preview share?
0 benchmarks have published results for both models. Claude 2.1 has 7 scored results on Noometry and Step 5 Preview has 18.