Model comparison
Chatgpt 4o Latest 20250326 vs GLM-5.1
GLM-5.1 is the stronger model overall, scoring 47.6 to 43.2 on the Noometry Index.
Last verified . 18 shared benchmarks.
Summary
- They share 18 benchmarks with published results for both. Chatgpt 4o Latest 20250326 scores higher in 0 categories and GLM-5.1 in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GLM-5.1 leads 55.0 to 38.7.
- GLM-5.1 has downloadable open weights; the other is API-only.
Side by side
| Chatgpt 4o Latest 20250326 | GLM-5.1 | |
|---|---|---|
| Provider | OpenAI | Z.ai (Zhipu) |
| Noometry Index | 43.2 | 47.6 |
| Released | — | 2026-04-07 |
| Weights | Proprietary | Open |
| Context window | — | 200K |
| Max output | — | 131K |
| Input $ / M tokens | — | $1.40 |
| Output $ / M tokens | — | $4.40 |
| Results tracked | 21 | 41 |
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Category by category
Coding GLM-5.1 leads
Chatgpt 4o Latest 20250326: 41.0 (#122), GLM-5.1: 48.5 (#52)
| Benchmark | Chatgpt 4o Latest 20250326 | GLM-5.1 |
|---|---|---|
| LMArena Coding | 1413 | 1486 |
| SWE-bench Verified | — | 74.2% |
| LMArena WebDev | — | 1509 |
| SciCode | — | 43.8% |
| WeirdML | — | 57.1% |
| ALE-Bench | — | 887.1 |
Agentic & Tool Use Not comparable
Chatgpt 4o Latest 20250326: —, GLM-5.1: 24.8 (#106)
| Benchmark | Chatgpt 4o Latest 20250326 | GLM-5.1 |
|---|---|---|
| APEX-Agents | — | 40.9% |
| ExploitBench | — | 18.1% |
| GBAEval | — | 0% |
| Vending-Bench 2 | — | 5,634 |
Reasoning GLM-5.1 leads
Chatgpt 4o Latest 20250326: 32.8 (#64), GLM-5.1: 38.2 (#57)
| Benchmark | Chatgpt 4o Latest 20250326 | GLM-5.1 |
|---|---|---|
| LMArena Hard Prompts | 1424 | 1472 |
| SimpleBench | — | 55.1% |
| Kagi LLM Benchmark | 75% | — |
| NYT Connections (extended) | — | 77.7% |
| CritPt | — | 4.6% |
| Chess Puzzles | — | 19% |
| Thematic Generalization | — | 69.8% |
| Epoch Capabilities Index | — | 149.86 |
Math GLM-5.1 leads
Chatgpt 4o Latest 20250326: 35.8 (#134), GLM-5.1: 49.0 (#48)
| Benchmark | Chatgpt 4o Latest 20250326 | GLM-5.1 |
|---|---|---|
| LMArena Math | 1407 | 1472 |
| 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
Chatgpt 4o Latest 20250326: 38.7 (#131), GLM-5.1: 55.0 (#45)
| Benchmark | Chatgpt 4o Latest 20250326 | GLM-5.1 |
|---|---|---|
| LMArena Expert | 1400 | 1477 |
| GPQA Diamond | — | 89.9% |
| SimpleQA Verified | — | 34% |
| Confabulations | 16.6% | — |
Multimodal Not comparable
Chatgpt 4o Latest 20250326: 38.9 (#54), GLM-5.1: —
| Benchmark | Chatgpt 4o Latest 20250326 | GLM-5.1 |
|---|---|---|
| LMArena Vision | 1243 | — |
Multilingual GLM-5.1 leads
Chatgpt 4o Latest 20250326: 53.1 (#72), GLM-5.1: 55.2 (#34)
| Benchmark | Chatgpt 4o Latest 20250326 | GLM-5.1 |
|---|---|---|
| LMArena Non-English | 1419 | 1448 |
| LMArena Chinese | 1456 | 1516 |
| LMArena French | 1447 | 1478 |
| LMArena German | 1424 | 1466 |
| LMArena Japanese | 1406 | 1436 |
| LMArena Korean | 1397 | 1423 |
| LMArena Russian | 1429 | 1453 |
| LMArena Spanish | 1435 | 1467 |
Instruction Following GLM-5.1 leads
Chatgpt 4o Latest 20250326: 74.2 (#102), GLM-5.1: 76.5 (#41)
| Benchmark | Chatgpt 4o Latest 20250326 | GLM-5.1 |
|---|---|---|
| LMArena Instruction Following | 1403 | 1451 |
Long Context GLM-5.1 leads
Chatgpt 4o Latest 20250326: 43.1 (#104), GLM-5.1: 44.9 (#51)
| Benchmark | Chatgpt 4o Latest 20250326 | GLM-5.1 |
|---|---|---|
| LMArena Longer Query | 1413 | 1467 |
Writing & Preference GLM-5.1 leads
Chatgpt 4o Latest 20250326: 62.8 (#68), GLM-5.1: 67.2 (#29)
| Benchmark | Chatgpt 4o Latest 20250326 | GLM-5.1 |
|---|---|---|
| LMArena Text | 1429 | 1462 |
| LMArena Creative Writing | 1406 | 1454 |
| EQ-Bench Creative Writing | 1501 | 1592 |
| LMArena Multi-Turn | 1454 | 1473 |
Frequently asked questions
Is Chatgpt 4o Latest 20250326 better than GLM-5.1?
GLM-5.1 is the stronger model overall, scoring 47.6 to 43.2 on the Noometry Index.
Is Chatgpt 4o Latest 20250326 or GLM-5.1 better for coding?
GLM-5.1 scores higher on coding benchmarks: 48.5 versus 41.0 in the Noometry coding category.
How many benchmarks do Chatgpt 4o Latest 20250326 and GLM-5.1 share?
18 benchmarks have published results for both models. Chatgpt 4o Latest 20250326 has 21 scored results on Noometry and GLM-5.1 has 41.