Model comparison
GLM-5.1 vs Grok 4.1
GLM-5.1 is the stronger model overall, scoring 47.8 to 41.5 on the Noometry Index.
Last verified . 18 shared benchmarks.
Summary
- They share 18 benchmarks with published results for both. GLM-5.1 scores higher in 8 categories and Grok 4.1 in 1 category; 9 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GLM-5.1 leads 54.9 to 39.5.
- GLM-5.1 has downloadable open weights; the other is API-only.
Side by side
| GLM-5.1 | Grok 4.1 | |
|---|---|---|
| Provider | Z.ai (Zhipu) | xAI |
| Noometry Index | 47.8 | 41.5 |
| Released | 2026-04-07 | 2025-11-17 |
| Weights | Open | Proprietary |
| Context window | 200K | — |
| Max output | 131K | — |
| Input $ / M tokens | $1.40 | — |
| Output $ / M tokens | $4.40 | — |
| Results tracked | 41 | 19 |
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Category by category
Coding GLM-5.1 leads
GLM-5.1: 48.7 (#55), Grok 4.1: 33.7 (#253)
| Benchmark | GLM-5.1 | Grok 4.1 |
|---|---|---|
| LMArena WebDev | 1508 | 1214 |
| LMArena Coding | 1485 | 1445 |
| SWE-bench Verified | 74.2% | — |
| SciCode | 43.8% | — |
| WeirdML | 57.1% | — |
| ALE-Bench | 887.1 | — |
Agentic & Tool Use Grok 4.1 leads
GLM-5.1: 24.9 (#113), Grok 4.1: 34.1 (#49)
| Benchmark | GLM-5.1 | Grok 4.1 |
|---|---|---|
| APEX-Agents | 40.9% | — |
| Cybench | — | 39% |
| ExploitBench | 18.1% | — |
| GBAEval | 0% | — |
| Vending-Bench 2 | 5,634 | — |
Reasoning GLM-5.1 leads
GLM-5.1: 39.1 (#60), Grok 4.1: 29.5 (#91)
| Benchmark | GLM-5.1 | Grok 4.1 |
|---|---|---|
| LMArena Hard Prompts | 1472 | 1435 |
| 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), Grok 4.1: 38.9 (#120)
| Benchmark | GLM-5.1 | Grok 4.1 |
|---|---|---|
| LMArena Math | 1473 | 1422 |
| 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), Grok 4.1: 39.5 (#133)
| Benchmark | GLM-5.1 | Grok 4.1 |
|---|---|---|
| LMArena Expert | 1476 | 1417 |
| GPQA Diamond | 89.9% | — |
| SimpleQA Verified | 34% | — |
Multilingual GLM-5.1 leads
GLM-5.1: 55.0 (#36), Grok 4.1: 53.4 (#68)
| Benchmark | GLM-5.1 | Grok 4.1 |
|---|---|---|
| LMArena Non-English | 1447 | 1425 |
| LMArena Chinese | 1515 | 1465 |
| LMArena French | 1474 | 1448 |
| LMArena German | 1465 | 1446 |
| LMArena Japanese | 1434 | 1397 |
| LMArena Korean | 1418 | 1407 |
| LMArena Russian | 1454 | 1434 |
| LMArena Spanish | 1469 | 1438 |
Instruction Following GLM-5.1 leads
GLM-5.1: 76.3 (#42), Grok 4.1: 73.8 (#111)
| Benchmark | GLM-5.1 | Grok 4.1 |
|---|---|---|
| LMArena Instruction Following | 1451 | 1400 |
Long Context GLM-5.1 leads
GLM-5.1: 44.9 (#53), Grok 4.1: 43.2 (#100)
| Benchmark | GLM-5.1 | Grok 4.1 |
|---|---|---|
| LMArena Longer Query | 1466 | 1416 |
Writing & Preference GLM-5.1 leads
GLM-5.1: 66.9 (#31), Grok 4.1: 62.4 (#75)
| Benchmark | GLM-5.1 | Grok 4.1 |
|---|---|---|
| LMArena Text | 1461 | 1437 |
| LMArena Creative Writing | 1453 | 1411 |
| LMArena Multi-Turn | 1472 | 1437 |
| EQ-Bench Creative Writing | 1592 | — |
Frequently asked questions
Is GLM-5.1 better than Grok 4.1?
GLM-5.1 is the stronger model overall, scoring 47.8 to 41.5 on the Noometry Index.
Is GLM-5.1 or Grok 4.1 better for coding?
GLM-5.1 scores higher on coding benchmarks: 48.7 versus 33.7 in the Noometry coding category.
How many benchmarks do GLM-5.1 and Grok 4.1 share?
18 benchmarks have published results for both models. GLM-5.1 has 41 scored results on Noometry and Grok 4.1 has 19.