Model comparison
Molmo 2 8b vs Yi-Lightning
Molmo 2 8b is the stronger model overall, scoring 39.1 to 37.1 on the Noometry Index.
Last verified . 4 shared benchmarks.
Allen Institute for AI (Ai2)Summary
- They share 4 benchmarks with published results for both. Molmo 2 8b scores higher in 1 category and Yi-Lightning in 3 categories, but none of those gaps is larger than the uncertainty.
- Molmo 2 8b has downloadable open weights; the other is API-only.
Side by side
| Molmo 2 8b | Yi-Lightning | |
|---|---|---|
| Provider | Allen Institute for AI (Ai2) | 01.AI |
| Noometry Index | 39.1 | 37.1 |
| Released | — | 2024-12-02 |
| Weights | Open | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 5 | 18 |
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Category by category
Coding Not comparable
Molmo 2 8b: —, Yi-Lightning: 27.4 (#320)
| Benchmark | Molmo 2 8b | Yi-Lightning |
|---|---|---|
| Aider Polyglot | — | 12.9% |
| LMArena Coding | — | 1312 |
Reasoning Too close to call
Molmo 2 8b: 25.6 (#146), Yi-Lightning: 25.9 (#139)
| Benchmark | Molmo 2 8b | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1287 | 1302 |
Math Not comparable
Molmo 2 8b: —, Yi-Lightning: 36.2 (#172)
| Benchmark | Molmo 2 8b | Yi-Lightning |
|---|---|---|
| LMArena Math | — | 1300 |
Knowledge Not comparable
Molmo 2 8b: —, Yi-Lightning: 35.4 (#185)
| Benchmark | Molmo 2 8b | Yi-Lightning |
|---|---|---|
| LMArena Expert | — | 1286 |
Multimodal Not comparable
Molmo 2 8b: 30.2 (#112), Yi-Lightning: —
| Benchmark | Molmo 2 8b | Yi-Lightning |
|---|---|---|
| LMArena Vision | 1081 | — |
Multilingual Too close to call
Molmo 2 8b: 42.7 (#190), Yi-Lightning: 42.2 (#196)
| Benchmark | Molmo 2 8b | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1276 | 1269 |
| LMArena Chinese | — | 1320 |
| LMArena French | — | 1305 |
| LMArena German | — | 1267 |
| LMArena Japanese | — | 1228 |
| LMArena Korean | — | 1192 |
| LMArena Russian | — | 1255 |
| LMArena Spanish | — | 1315 |
Instruction Following Too close to call
Molmo 2 8b: 67.0 (#201), Yi-Lightning: 67.4 (#196)
| Benchmark | Molmo 2 8b | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1270 | 1278 |
Long Context Not comparable
Molmo 2 8b: —, Yi-Lightning: 39.4 (#181)
| Benchmark | Molmo 2 8b | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | — | 1297 |
Writing & Preference Too close to call
Molmo 2 8b: 49.4 (#191), Yi-Lightning: 50.2 (#184)
| Benchmark | Molmo 2 8b | Yi-Lightning |
|---|---|---|
| LMArena Text | 1288 | 1302 |
| LMArena Creative Writing | — | 1280 |
| LMArena Multi-Turn | — | 1311 |
Frequently asked questions
Is Molmo 2 8b better than Yi-Lightning?
Molmo 2 8b is the stronger model overall, scoring 39.1 to 37.1 on the Noometry Index.
How many benchmarks do Molmo 2 8b and Yi-Lightning share?
4 benchmarks have published results for both models. Molmo 2 8b has 5 scored results on Noometry and Yi-Lightning has 18.