Model comparison
Step 3.7 Flash vs Yi-Lightning
Step 3.7 Flash and Yi-Lightning score almost the same on the Noometry Index (37.3 vs 37.1), so choose on price, context window or the category you care about most.
Last verified . 0 shared benchmarks.
StepFunSummary
- The widest gap is in coding, where Step 3.7 Flash leads 40.0 to 27.4.
- Step 3.7 Flash has downloadable open weights; the other is API-only.
Side by side
| Step 3.7 Flash | Yi-Lightning | |
|---|---|---|
| Provider | StepFun | 01.AI |
| Noometry Index | 37.3 | 37.1 |
| Released | 2026-05-29 | 2024-12-02 |
| Weights | Open | Proprietary |
| Context window | 256K | — |
| Max output | 256K | — |
| Input $ / M tokens | $0.18 | — |
| Output $ / M tokens | $1.11 | — |
| Results tracked | 5 | 18 |
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Category by category
Coding Step 3.7 Flash leads
Step 3.7 Flash: 40.0 (#150), Yi-Lightning: 27.4 (#320)
| Benchmark | Step 3.7 Flash | Yi-Lightning |
|---|---|---|
| Aider Polyglot | — | 12.9% |
| SciCode | 40% | — |
| LMArena Coding | — | 1312 |
| ALE-Bench | 694.12 | — |
Reasoning Yi-Lightning leads
Step 3.7 Flash: 21.6 (#219), Yi-Lightning: 25.9 (#139)
| Benchmark | Step 3.7 Flash | Yi-Lightning |
|---|---|---|
| NYT Connections (extended) | 39.7% | — |
| CritPt | 2.3% | — |
| LMArena Hard Prompts | — | 1302 |
Math Step 3.7 Flash leads
Step 3.7 Flash: 42.9 (#82), Yi-Lightning: 36.2 (#172)
| Benchmark | Step 3.7 Flash | Yi-Lightning |
|---|---|---|
| MathArena Final-Answer Competitions | 68.5% | — |
| LMArena Math | — | 1300 |
Knowledge Not comparable
Step 3.7 Flash: —, Yi-Lightning: 35.4 (#185)
| Benchmark | Step 3.7 Flash | Yi-Lightning |
|---|---|---|
| LMArena Expert | — | 1286 |
Multilingual Not comparable
Step 3.7 Flash: —, Yi-Lightning: 42.2 (#196)
| Benchmark | Step 3.7 Flash | Yi-Lightning |
|---|---|---|
| LMArena Non-English | — | 1269 |
| LMArena Chinese | — | 1320 |
| LMArena French | — | 1305 |
| LMArena German | — | 1267 |
| LMArena Japanese | — | 1228 |
| LMArena Korean | — | 1192 |
| LMArena Russian | — | 1255 |
| LMArena Spanish | — | 1315 |
Instruction Following Not comparable
Step 3.7 Flash: —, Yi-Lightning: 67.4 (#196)
| Benchmark | Step 3.7 Flash | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | — | 1278 |
Long Context Not comparable
Step 3.7 Flash: —, Yi-Lightning: 39.4 (#181)
| Benchmark | Step 3.7 Flash | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | — | 1297 |
Writing & Preference Not comparable
Step 3.7 Flash: —, Yi-Lightning: 50.2 (#184)
| Benchmark | Step 3.7 Flash | Yi-Lightning |
|---|---|---|
| LMArena Text | — | 1302 |
| LMArena Creative Writing | — | 1280 |
| LMArena Multi-Turn | — | 1311 |
Frequently asked questions
Is Step 3.7 Flash better than Yi-Lightning?
Step 3.7 Flash and Yi-Lightning score almost the same on the Noometry Index (37.3 vs 37.1), so choose on price, context window or the category you care about most.
Is Step 3.7 Flash or Yi-Lightning better for coding?
Step 3.7 Flash scores higher on coding benchmarks: 40.0 versus 27.4 in the Noometry coding category.
How many benchmarks do Step 3.7 Flash and Yi-Lightning share?
0 benchmarks have published results for both models. Step 3.7 Flash has 5 scored results on Noometry and Yi-Lightning has 18.