Model comparison
Step 2 16k Exp 202412 vs Yi-Lightning
Step 2 16k Exp 202412 is the stronger model overall, scoring 39.2 to 37.1 on the Noometry Index.
Last verified . 12 shared benchmarks.
StepFunSummary
- They share 12 benchmarks with published results for both. Step 2 16k Exp 202412 scores higher in 6 categories and Yi-Lightning in 2 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in coding, where Step 2 16k Exp 202412 leads 38.5 to 27.4.
Side by side
| Step 2 16k Exp 202412 | Yi-Lightning | |
|---|---|---|
| Provider | StepFun | 01.AI |
| Noometry Index | 39.2 | 37.1 |
| Released | — | 2024-12-02 |
| Weights | Proprietary | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 12 | 18 |
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Category by category
Coding Step 2 16k Exp 202412 leads
Step 2 16k Exp 202412: 38.5 (#174), Yi-Lightning: 27.4 (#320)
| Benchmark | Step 2 16k Exp 202412 | Yi-Lightning |
|---|---|---|
| LMArena Coding | 1316 | 1312 |
| Aider Polyglot | — | 12.9% |
Reasoning Too close to call
Step 2 16k Exp 202412: 25.9 (#142), Yi-Lightning: 25.9 (#139)
| Benchmark | Step 2 16k Exp 202412 | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1299 | 1302 |
Math Too close to call
Step 2 16k Exp 202412: 36.3 (#169), Yi-Lightning: 36.2 (#172)
| Benchmark | Step 2 16k Exp 202412 | Yi-Lightning |
|---|---|---|
| LMArena Math | 1304 | 1300 |
Knowledge Too close to call
Step 2 16k Exp 202412: 35.2 (#187), Yi-Lightning: 35.4 (#185)
| Benchmark | Step 2 16k Exp 202412 | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1279 | 1286 |
Multilingual Step 2 16k Exp 202412 leads
Step 2 16k Exp 202412: 43.7 (#181), Yi-Lightning: 42.2 (#196)
| Benchmark | Step 2 16k Exp 202412 | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1290 | 1269 |
| LMArena Chinese | 1331 | 1320 |
| LMArena Russian | 1324 | 1255 |
| LMArena French | — | 1305 |
| LMArena German | — | 1267 |
| LMArena Japanese | — | 1228 |
| LMArena Korean | — | 1192 |
| LMArena Spanish | — | 1315 |
Instruction Following Too close to call
Step 2 16k Exp 202412: 67.9 (#192), Yi-Lightning: 67.4 (#196)
| Benchmark | Step 2 16k Exp 202412 | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1287 | 1278 |
Long Context Too close to call
Step 2 16k Exp 202412: 39.7 (#170), Yi-Lightning: 39.4 (#181)
| Benchmark | Step 2 16k Exp 202412 | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1307 | 1297 |
Writing & Preference Step 2 16k Exp 202412 leads
Step 2 16k Exp 202412: 52.3 (#173), Yi-Lightning: 50.2 (#184)
| Benchmark | Step 2 16k Exp 202412 | Yi-Lightning |
|---|---|---|
| LMArena Text | 1321 | 1302 |
| LMArena Creative Writing | 1328 | 1280 |
| LMArena Multi-Turn | 1292 | 1311 |
Frequently asked questions
Is Step 2 16k Exp 202412 better than Yi-Lightning?
Step 2 16k Exp 202412 is the stronger model overall, scoring 39.2 to 37.1 on the Noometry Index.
Is Step 2 16k Exp 202412 or Yi-Lightning better for coding?
Step 2 16k Exp 202412 scores higher on coding benchmarks: 38.5 versus 27.4 in the Noometry coding category.
How many benchmarks do Step 2 16k Exp 202412 and Yi-Lightning share?
12 benchmarks have published results for both models. Step 2 16k Exp 202412 has 12 scored results on Noometry and Yi-Lightning has 18.