Model comparison
GLM-4.5 vs GLM-5.3
GLM-5.3 is the stronger model overall, scoring 54.8 to 42.0 on the Noometry Index. GLM-4.5 costs 2.1× less per token, which makes it the better buy when GLM-5.3's lead doesn't matter for your workload.
Last verified . 20 shared benchmarks.
Summary
- They share 20 benchmarks with published results for both. GLM-4.5 scores higher in 0 categories and GLM-5.3 in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where GLM-5.3 leads 62.3 to 39.0.
- The biggest single-benchmark swing is WeirdML: 40.6% for GLM-4.5 and 75.4% for GLM-5.3.
- GLM-4.5 is cheaper at $0.60 / $2.20 per million input/output tokens, against $1.40 / $4.40 for GLM-5.3.
- GLM-5.3 accepts more context: 1M tokens versus 131K.
Side by side
| GLM-4.5 | GLM-5.3 | |
|---|---|---|
| Provider | Z.ai (Zhipu) | Z.ai (Zhipu) |
| Noometry Index | 42.0 | 54.8 |
| Released | 2025-07-27 | 2026-08-14 |
| Weights | Open | Open |
| Context window | 131K | 1M |
| Max output | 98K | 131K |
| Input $ / M tokens | $0.60 | $1.40 |
| Output $ / M tokens | $2.20 | $4.40 |
| Results tracked | 27 | 42 |
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Category by category
Coding GLM-5.3 leads
GLM-4.5: 41.4 (#125), GLM-5.3: 59.5 (#14)
| Benchmark | GLM-4.5 | GLM-5.3 |
|---|---|---|
| WeirdML | 40.6% | 75.4% |
| LMArena Coding | 1434 | 1496 |
| ALE-Bench | 344.82 | 1,317 |
| DeepSWE | — | 69% |
| FrontierCode | — | 40.1% |
| SWE-bench Verified (bash only) | 54.2% | — |
| CursorBench | — | 42.6% |
| LMArena WebDev | — | 1622 |
| FrontierSWE | — | 30.2% |
| SciCode | — | 59% |
| AlgoTune | 1.52 | — |
Agentic & Tool Use Not comparable
GLM-4.5: —, GLM-5.3: 36.4 (#38)
| Benchmark | GLM-4.5 | GLM-5.3 |
|---|---|---|
| APEX-Agents | — | 56.6% |
| Vending-Bench 2 | — | 8,164 |
Reasoning GLM-5.3 leads
GLM-4.5: 28.6 (#100), GLM-5.3: 46.1 (#46)
| Benchmark | GLM-4.5 | GLM-5.3 |
|---|---|---|
| LMArena Hard Prompts | 1429 | 1489 |
| Kagi LLM Benchmark | 57.9% | — |
| NYT Connections (extended) | — | 74.2% |
| CritPt | — | 19.1% |
| Chess Puzzles | — | 21% |
| Mystery Game Puzzles | — | 33% |
| DTBench | — | 87.7% |
| LMCA | — | 55.5% |
| Bench to the Future 3 | — | 0.15 |
| Epoch Capabilities Index | — | 155.61 |
Math GLM-5.3 leads
GLM-4.5: 39.0 (#116), GLM-5.3: 62.3 (#33)
| Benchmark | GLM-4.5 | GLM-5.3 |
|---|---|---|
| LMArena Math | 1427 | 1489 |
| FrontierMath (Tiers 1-3) | — | 68.8% |
| FrontierMath Tier 4 | — | 29.3% |
| OTIS Mock AIME 2024-2025 | — | 91.1% |
| ProofBench | — | 49% |
Knowledge GLM-5.3 leads
GLM-4.5: 35.9 (#179), GLM-5.3: 58.3 (#37)
| Benchmark | GLM-4.5 | GLM-5.3 |
|---|---|---|
| LMArena Expert | 1433 | 1516 |
| GPQA Diamond | — | 90.9% |
| Humanity's Last Exam | 8.3% | — |
| SimpleQA Verified | — | 41% |
| Confabulations | 11.3% | — |
Multilingual GLM-5.3 leads
GLM-4.5: 52.8 (#77), GLM-5.3: 55.7 (#28)
| Benchmark | GLM-4.5 | GLM-5.3 |
|---|---|---|
| LMArena Non-English | 1417 | 1457 |
| LMArena Chinese | 1465 | 1528 |
| LMArena French | 1418 | 1499 |
| LMArena German | 1407 | 1499 |
| LMArena Japanese | 1415 | 1453 |
| LMArena Korean | 1380 | 1472 |
| LMArena Russian | 1414 | 1463 |
| LMArena Spanish | 1454 | 1460 |
Instruction Following GLM-5.3 leads
GLM-4.5: 74.1 (#104), GLM-5.3: 77.5 (#23)
| Benchmark | GLM-4.5 | GLM-5.3 |
|---|---|---|
| LMArena Instruction Following | 1404 | 1477 |
Long Context GLM-5.3 leads
GLM-4.5: 38.2 (#201), GLM-5.3: 45.4 (#41)
| Benchmark | GLM-4.5 | GLM-5.3 |
|---|---|---|
| LMArena Longer Query | 1412 | 1482 |
| Fiction.LiveBench | 58.3% | — |
Writing & Preference GLM-5.3 leads
GLM-4.5: 57.5 (#127), GLM-5.3: 75.7 (#6)
| Benchmark | GLM-4.5 | GLM-5.3 |
|---|---|---|
| LMArena Text | 1430 | 1471 |
| LMArena Creative Writing | 1395 | 1457 |
| EQ-Bench Creative Writing | 1343 | 2075 |
| LMArena Multi-Turn | 1415 | 1472 |
| Short-Story Creative Writing | 73.4% | — |
Frequently asked questions
Is GLM-4.5 better than GLM-5.3?
GLM-5.3 is the stronger model overall, scoring 54.8 to 42.0 on the Noometry Index. GLM-4.5 costs 2.1× less per token, which makes it the better buy when GLM-5.3's lead doesn't matter for your workload.
Which is cheaper, GLM-4.5 or GLM-5.3?
GLM-4.5 is cheaper. It lists at $0.60 per million input tokens and $2.20 per million output tokens; GLM-5.3 lists at $1.40 and $4.40.
Is GLM-4.5 or GLM-5.3 better for coding?
GLM-5.3 scores higher on coding benchmarks: 59.5 versus 41.4 in the Noometry coding category.
Which has the bigger context window?
GLM-5.3 does, with 1M tokens against 131K.
How many benchmarks do GLM-4.5 and GLM-5.3 share?
20 benchmarks have published results for both models. GLM-4.5 has 27 scored results on Noometry and GLM-5.3 has 42.