Model comparison
Chatgpt 4o Latest 20250326 vs GLM-4.5
Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.8 to 42.0 on the Noometry Index.
Last verified . 20 shared benchmarks.
Summary
- They share 20 benchmarks with published results for both. Chatgpt 4o Latest 20250326 scores higher in 6 categories and GLM-4.5 in 2 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Chatgpt 4o Latest 20250326 leads 33.8 to 28.6.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 75% for Chatgpt 4o Latest 20250326 and 57.9% for GLM-4.5.
- GLM-4.5 has downloadable open weights; the other is API-only.
Side by side
| Chatgpt 4o Latest 20250326 | GLM-4.5 | |
|---|---|---|
| Provider | OpenAI | Z.ai (Zhipu) |
| Noometry Index | 43.8 | 42.0 |
| Released | — | 2025-07-27 |
| Weights | Proprietary | Open |
| Context window | — | 131K |
| Max output | — | 98K |
| Input $ / M tokens | — | $0.60 |
| Output $ / M tokens | — | $2.20 |
| Results tracked | 21 | 27 |
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Category by category
Coding Too close to call
Chatgpt 4o Latest 20250326: 41.6 (#122), GLM-4.5: 41.4 (#125)
| Benchmark | Chatgpt 4o Latest 20250326 | GLM-4.5 |
|---|---|---|
| LMArena Coding | 1413 | 1434 |
| SWE-bench Verified (bash only) | — | 54.2% |
| WeirdML | — | 40.6% |
| ALE-Bench | — | 344.82 |
| AlgoTune | — | 1.52 |
Reasoning Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 33.8 (#71), GLM-4.5: 28.6 (#100)
| Benchmark | Chatgpt 4o Latest 20250326 | GLM-4.5 |
|---|---|---|
| Kagi LLM Benchmark | 75% | 57.9% |
| LMArena Hard Prompts | 1424 | 1429 |
Math Too close to call
Chatgpt 4o Latest 20250326: 38.6 (#134), GLM-4.5: 39.0 (#116)
| Benchmark | Chatgpt 4o Latest 20250326 | GLM-4.5 |
|---|---|---|
| LMArena Math | 1407 | 1427 |
Knowledge Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 39.2 (#137), GLM-4.5: 35.9 (#179)
| Benchmark | Chatgpt 4o Latest 20250326 | GLM-4.5 |
|---|---|---|
| Confabulations | 16.6% | 11.3% |
| LMArena Expert | 1401 | 1433 |
| Humanity's Last Exam | — | 8.3% |
Multimodal Not comparable
Chatgpt 4o Latest 20250326: 39.6 (#58), GLM-4.5: —
| Benchmark | Chatgpt 4o Latest 20250326 | GLM-4.5 |
|---|---|---|
| LMArena Vision | 1243 | — |
Multilingual Too close to call
Chatgpt 4o Latest 20250326: 52.9 (#76), GLM-4.5: 52.8 (#77)
| Benchmark | Chatgpt 4o Latest 20250326 | GLM-4.5 |
|---|---|---|
| LMArena Non-English | 1419 | 1417 |
| LMArena Chinese | 1457 | 1465 |
| LMArena French | 1446 | 1418 |
| LMArena German | 1423 | 1407 |
| LMArena Japanese | 1405 | 1415 |
| LMArena Korean | 1396 | 1380 |
| LMArena Russian | 1429 | 1414 |
| LMArena Spanish | 1434 | 1454 |
Instruction Following Too close to call
Chatgpt 4o Latest 20250326: 74.0 (#107), GLM-4.5: 74.1 (#104)
| Benchmark | Chatgpt 4o Latest 20250326 | GLM-4.5 |
|---|---|---|
| LMArena Instruction Following | 1403 | 1404 |
Long Context Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 43.1 (#107), GLM-4.5: 38.2 (#201)
| Benchmark | Chatgpt 4o Latest 20250326 | GLM-4.5 |
|---|---|---|
| LMArena Longer Query | 1413 | 1412 |
| Fiction.LiveBench | — | 58.3% |
Writing & Preference Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 62.6 (#72), GLM-4.5: 57.5 (#127)
| Benchmark | Chatgpt 4o Latest 20250326 | GLM-4.5 |
|---|---|---|
| LMArena Text | 1429 | 1430 |
| LMArena Creative Writing | 1405 | 1395 |
| EQ-Bench Creative Writing | 1501 | 1343 |
| LMArena Multi-Turn | 1454 | 1415 |
| Short-Story Creative Writing | — | 73.4% |
Frequently asked questions
Is Chatgpt 4o Latest 20250326 better than GLM-4.5?
Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.8 to 42.0 on the Noometry Index.
Is Chatgpt 4o Latest 20250326 or GLM-4.5 better for coding?
They score almost the same on coding (41.6 vs 41.4); test both on your own repository before choosing.
How many benchmarks do Chatgpt 4o Latest 20250326 and GLM-4.5 share?
20 benchmarks have published results for both models. Chatgpt 4o Latest 20250326 has 21 scored results on Noometry and GLM-4.5 has 27.