Model comparison
GLM-5.1 vs Yi-Lightning
GLM-5.1 is the stronger model overall, scoring 47.8 to 37.1 on the Noometry Index.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. GLM-5.1 scores higher in 8 categories and Yi-Lightning in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in coding, where GLM-5.1 leads 48.7 to 27.4.
- GLM-5.1 has downloadable open weights; the other is API-only.
Side by side
| GLM-5.1 | Yi-Lightning | |
|---|---|---|
| Provider | Z.ai (Zhipu) | 01.AI |
| Noometry Index | 47.8 | 37.1 |
| Released | 2026-04-07 | 2024-12-02 |
| Weights | Open | Proprietary |
| Context window | 200K | — |
| Max output | 131K | — |
| Input $ / M tokens | $1.40 | — |
| Output $ / M tokens | $4.40 | — |
| Results tracked | 41 | 18 |
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Category by category
Coding GLM-5.1 leads
GLM-5.1: 48.7 (#55), Yi-Lightning: 27.4 (#320)
| Benchmark | GLM-5.1 | Yi-Lightning |
|---|---|---|
| LMArena Coding | 1485 | 1312 |
| SWE-bench Verified | 74.2% | — |
| Aider Polyglot | — | 12.9% |
| LMArena WebDev | 1508 | — |
| SciCode | 43.8% | — |
| WeirdML | 57.1% | — |
| ALE-Bench | 887.1 | — |
Agentic & Tool Use Not comparable
GLM-5.1: 24.9 (#113), Yi-Lightning: —
| Benchmark | GLM-5.1 | Yi-Lightning |
|---|---|---|
| APEX-Agents | 40.9% | — |
| ExploitBench | 18.1% | — |
| GBAEval | 0% | — |
| Vending-Bench 2 | 5,634 | — |
Reasoning GLM-5.1 leads
GLM-5.1: 39.1 (#60), Yi-Lightning: 25.9 (#139)
| Benchmark | GLM-5.1 | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1472 | 1302 |
| SimpleBench | 55.1% | — |
| NYT Connections (extended) | 77.7% | — |
| CritPt | 4.6% | — |
| Chess Puzzles | 19% | — |
| Thematic Generalization | 69.8% | — |
| Epoch Capabilities Index | 149.84 | — |
Math GLM-5.1 leads
GLM-5.1: 49.7 (#60), Yi-Lightning: 36.2 (#172)
| Benchmark | GLM-5.1 | Yi-Lightning |
|---|---|---|
| LMArena Math | 1473 | 1300 |
| FrontierMath (Tiers 1-3) | 36.8% | — |
| MathArena Final-Answer Competitions | 67.1% | — |
| OTIS Mock AIME 2024-2025 | 93.3% | — |
| ProofBench | 22.2% | — |
| FrontierMath (Feb 2025 set) | 33.4% | — |
| FrontierMath Tier 4 (v1) | 12.5% | — |
Knowledge GLM-5.1 leads
GLM-5.1: 54.9 (#50), Yi-Lightning: 35.4 (#185)
| Benchmark | GLM-5.1 | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1476 | 1286 |
| GPQA Diamond | 89.9% | — |
| SimpleQA Verified | 34% | — |
Multilingual GLM-5.1 leads
GLM-5.1: 55.0 (#36), Yi-Lightning: 42.2 (#196)
| Benchmark | GLM-5.1 | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1447 | 1269 |
| LMArena Chinese | 1515 | 1320 |
| LMArena French | 1474 | 1305 |
| LMArena German | 1465 | 1267 |
| LMArena Japanese | 1434 | 1228 |
| LMArena Korean | 1418 | 1192 |
| LMArena Russian | 1454 | 1255 |
| LMArena Spanish | 1469 | 1315 |
Instruction Following GLM-5.1 leads
GLM-5.1: 76.3 (#42), Yi-Lightning: 67.4 (#196)
| Benchmark | GLM-5.1 | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1451 | 1278 |
Long Context GLM-5.1 leads
GLM-5.1: 44.9 (#53), Yi-Lightning: 39.4 (#181)
| Benchmark | GLM-5.1 | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1466 | 1297 |
Writing & Preference GLM-5.1 leads
GLM-5.1: 66.9 (#31), Yi-Lightning: 50.2 (#184)
| Benchmark | GLM-5.1 | Yi-Lightning |
|---|---|---|
| LMArena Text | 1461 | 1302 |
| LMArena Creative Writing | 1453 | 1280 |
| LMArena Multi-Turn | 1472 | 1311 |
| EQ-Bench Creative Writing | 1592 | — |
Frequently asked questions
Is GLM-5.1 better than Yi-Lightning?
GLM-5.1 is the stronger model overall, scoring 47.8 to 37.1 on the Noometry Index.
Is GLM-5.1 or Yi-Lightning better for coding?
GLM-5.1 scores higher on coding benchmarks: 48.7 versus 27.4 in the Noometry coding category.
How many benchmarks do GLM-5.1 and Yi-Lightning share?
17 benchmarks have published results for both models. GLM-5.1 has 41 scored results on Noometry and Yi-Lightning has 18.