Model comparison
Yi-1.5-34B vs Yi-Lightning
Yi-Lightning is the stronger model overall, scoring 36.5 to 30.2 on the Noometry Index.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. Yi-1.5-34B scores higher in 1 category and Yi-Lightning in 7 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Yi-Lightning leads 34.8 to 14.8.
- Yi-1.5-34B has downloadable open weights; the other is API-only.
Side by side
| Yi-1.5-34B | Yi-Lightning | |
|---|---|---|
| Provider | 01.AI | 01.AI |
| Noometry Index | 30.2 | 36.5 |
| Released | 2024-05-13 | 2024-12-02 |
| Weights | Open | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 21 | 18 |
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Category by category
Coding Yi-1.5-34B leads
Yi-1.5-34B: 31.9 (#267), Yi-Lightning: 27.0 (#315)
| Benchmark | Yi-1.5-34B | Yi-Lightning |
|---|---|---|
| LMArena Coding | 1169 | 1313 |
| Aider Polyglot | — | 12.9% |
| BigCodeBench Instruct | 33.9% | — |
| BigCodeBench Complete | 43.8% | — |
Reasoning Yi-Lightning leads
Yi-1.5-34B: 21.5 (#195), Yi-Lightning: 24.9 (#137)
| Benchmark | Yi-1.5-34B | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1160 | 1302 |
Math Yi-Lightning leads
Yi-1.5-34B: 25.3 (#248), Yi-Lightning: 33.5 (#173)
| Benchmark | Yi-1.5-34B | Yi-Lightning |
|---|---|---|
| LMArena Math | 1182 | 1300 |
| MATH Level 5 | 25.5% | — |
Knowledge Yi-Lightning leads
Yi-1.5-34B: 14.8 (#290), Yi-Lightning: 34.8 (#182)
| Benchmark | Yi-1.5-34B | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1144 | 1286 |
| GPQA Diamond | 32% | — |
Multilingual Yi-Lightning leads
Yi-1.5-34B: 32.5 (#251), Yi-Lightning: 42.4 (#191)
| Benchmark | Yi-1.5-34B | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1121 | 1269 |
| LMArena Chinese | 1213 | 1320 |
| LMArena French | 1155 | 1304 |
| LMArena German | 1111 | 1267 |
| LMArena Japanese | 1021 | 1228 |
| LMArena Korean | 1005 | 1192 |
| LMArena Russian | 1091 | 1255 |
| LMArena Spanish | 1120 | 1315 |
Instruction Following Yi-Lightning leads
Yi-1.5-34B: 59.4 (#252), Yi-Lightning: 67.6 (#191)
| Benchmark | Yi-1.5-34B | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1139 | 1278 |
Long Context Yi-Lightning leads
Yi-1.5-34B: 34.6 (#243), Yi-Lightning: 39.4 (#176)
| Benchmark | Yi-1.5-34B | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1144 | 1297 |
Writing & Preference Yi-Lightning leads
Yi-1.5-34B: 37.6 (#252), Yi-Lightning: 50.4 (#178)
| Benchmark | Yi-1.5-34B | Yi-Lightning |
|---|---|---|
| LMArena Text | 1173 | 1302 |
| LMArena Creative Writing | 1135 | 1280 |
| LMArena Multi-Turn | 1153 | 1311 |
Frequently asked questions
Is Yi-1.5-34B better than Yi-Lightning?
Yi-Lightning is the stronger model overall, scoring 36.5 to 30.2 on the Noometry Index.
Is Yi-1.5-34B or Yi-Lightning better for coding?
Yi-1.5-34B scores higher on coding benchmarks: 31.9 versus 27.0 in the Noometry coding category.
How many benchmarks do Yi-1.5-34B and Yi-Lightning share?
17 benchmarks have published results for both models. Yi-1.5-34B has 21 scored results on Noometry and Yi-Lightning has 18.