Model comparison
Step 5 Preview vs Tulu 3 (Tülu 3) 70B
Step 5 Preview is the stronger model overall, scoring 43.8 to 32.6 on the Noometry Index.
Last verified . 0 shared benchmarks.
StepFun
Allen Institute for AI (Ai2)Summary
- The widest gap is in coding, where Step 5 Preview leads 50.6 to 35.4.
- Tulu 3 (Tülu 3) 70B has downloadable open weights; the other is API-only.
Side by side
| Step 5 Preview | Tulu 3 (Tülu 3) 70B | |
|---|---|---|
| Provider | StepFun | Allen Institute for AI (Ai2) |
| Noometry Index | 43.8 | 32.6 |
| Released | 2026-09-16 | 2024-11-21 |
| Weights | Proprietary | Open |
| Context window | 1.02M | — |
| Max output | 66K | — |
| Input $ / M tokens | $1 | — |
| Output $ / M tokens | $2.70 | — |
| Results tracked | 3 | 14 |
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Category by category
Coding Step 5 Preview leads
Step 5 Preview: 50.6 (#40), Tulu 3 (Tülu 3) 70B: 35.4 (#211)
| Benchmark | Step 5 Preview | Tulu 3 (Tülu 3) 70B |
|---|---|---|
| LMArena WebDev | 1569 | — |
| SciCode | 58.9% | — |
| LMArena Coding | — | 1236 |
Reasoning Step 5 Preview leads
Step 5 Preview: 38.0 (#58), Tulu 3 (Tülu 3) 70B: 22.9 (#172)
| Benchmark | Step 5 Preview | Tulu 3 (Tülu 3) 70B |
|---|---|---|
| CritPt | 20.9% | — |
| LMArena Hard Prompts | — | 1220 |
Math Not comparable
Step 5 Preview: —, Tulu 3 (Tülu 3) 70B: 13.3 (#297)
| Benchmark | Step 5 Preview | Tulu 3 (Tülu 3) 70B |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 4.4% |
| LMArena Math | — | 1242 |
| MATH Level 5 | — | 42.7% |
Knowledge Not comparable
Step 5 Preview: —, Tulu 3 (Tülu 3) 70B: 25.1 (#257)
| Benchmark | Step 5 Preview | Tulu 3 (Tülu 3) 70B |
|---|---|---|
| GPQA Diamond | — | 46.3% |
Multilingual Not comparable
Step 5 Preview: —, Tulu 3 (Tülu 3) 70B: 40.1 (#217)
| Benchmark | Step 5 Preview | Tulu 3 (Tülu 3) 70B |
|---|---|---|
| LMArena Non-English | — | 1236 |
| LMArena Chinese | — | 1249 |
| LMArena Russian | — | 1246 |
Instruction Following Not comparable
Step 5 Preview: —, Tulu 3 (Tülu 3) 70B: 65.0 (#222)
| Benchmark | Step 5 Preview | Tulu 3 (Tülu 3) 70B |
|---|---|---|
| LMArena Instruction Following | — | 1233 |
Long Context Not comparable
Step 5 Preview: —, Tulu 3 (Tülu 3) 70B: 37.1 (#217)
| Benchmark | Step 5 Preview | Tulu 3 (Tülu 3) 70B |
|---|---|---|
| LMArena Longer Query | — | 1224 |
Writing & Preference Not comparable
Step 5 Preview: —, Tulu 3 (Tülu 3) 70B: 45.8 (#218)
| Benchmark | Step 5 Preview | Tulu 3 (Tülu 3) 70B |
|---|---|---|
| LMArena Text | — | 1256 |
| LMArena Creative Writing | — | 1231 |
| LMArena Multi-Turn | — | 1252 |
Frequently asked questions
Is Step 5 Preview better than Tulu 3 (Tülu 3) 70B?
Step 5 Preview is the stronger model overall, scoring 43.8 to 32.6 on the Noometry Index.
Is Step 5 Preview or Tulu 3 (Tülu 3) 70B better for coding?
Step 5 Preview scores higher on coding benchmarks: 50.6 versus 35.4 in the Noometry coding category.
How many benchmarks do Step 5 Preview and Tulu 3 (Tülu 3) 70B share?
0 benchmarks have published results for both models. Step 5 Preview has 3 scored results on Noometry and Tulu 3 (Tülu 3) 70B has 14.