Model comparison
GLM-4.5 vs Solar Pro4
GLM-4.5 and Solar Pro4 score almost the same on the Noometry Index (42.0 vs 42.1), so choose on price, context window or the category you care about most.
Last verified . 17 shared benchmarks.
UpstageSummary
- They share 17 benchmarks with published results for both. GLM-4.5 scores higher in 6 categories and Solar Pro4 in 2 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in multilingual, where GLM-4.5 leads 52.8 to 48.7.
- Solar Pro4 is cheaper at $0.30 / $1.20 per million input/output tokens, against $0.60 / $2.20 for GLM-4.5.
- Solar Pro4 accepts more context: 524K tokens versus 131K.
- GLM-4.5 has downloadable open weights; the other is API-only.
Side by side
| GLM-4.5 | Solar Pro4 | |
|---|---|---|
| Provider | Z.ai (Zhipu) | Upstage |
| Noometry Index | 42.0 | 42.1 |
| Released | 2025-07-27 | 2026-08-06 |
| Weights | Open | Proprietary |
| Context window | 131K | 524K |
| Max output | 98K | 131K |
| Input $ / M tokens | $0.60 | $0.30 |
| Output $ / M tokens | $2.20 | $1.20 |
| Results tracked | 27 | 18 |
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Category by category
Coding GLM-4.5 leads
GLM-4.5: 41.4 (#125), Solar Pro4: 40.1 (#149)
| Benchmark | GLM-4.5 | Solar Pro4 |
|---|---|---|
| LMArena Coding | 1434 | 1437 |
| SWE-bench Verified (bash only) | 54.2% | — |
| LMArena WebDev | — | 1371 |
| WeirdML | 40.6% | — |
| ALE-Bench | 344.82 | — |
| AlgoTune | 1.52 | — |
Reasoning Too close to call
GLM-4.5: 28.6 (#100), Solar Pro4: 28.5 (#104)
| Benchmark | GLM-4.5 | Solar Pro4 |
|---|---|---|
| LMArena Hard Prompts | 1429 | 1399 |
| Kagi LLM Benchmark | 57.9% | — |
Math Too close to call
GLM-4.5: 39.0 (#116), Solar Pro4: 38.8 (#128)
| Benchmark | GLM-4.5 | Solar Pro4 |
|---|---|---|
| LMArena Math | 1427 | 1416 |
Knowledge Solar Pro4 leads
GLM-4.5: 35.9 (#179), Solar Pro4: 39.8 (#129)
| Benchmark | GLM-4.5 | Solar Pro4 |
|---|---|---|
| LMArena Expert | 1433 | 1427 |
| Humanity's Last Exam | 8.3% | — |
| Confabulations | 11.3% | — |
Multilingual GLM-4.5 leads
GLM-4.5: 52.8 (#77), Solar Pro4: 48.7 (#139)
| Benchmark | GLM-4.5 | Solar Pro4 |
|---|---|---|
| LMArena Non-English | 1417 | 1361 |
| LMArena Chinese | 1465 | 1415 |
| LMArena French | 1418 | 1397 |
| LMArena German | 1407 | 1364 |
| LMArena Japanese | 1415 | 1309 |
| LMArena Korean | 1380 | 1382 |
| LMArena Russian | 1414 | 1360 |
| LMArena Spanish | 1454 | 1401 |
Instruction Following GLM-4.5 leads
GLM-4.5: 74.1 (#104), Solar Pro4: 72.7 (#132)
| Benchmark | GLM-4.5 | Solar Pro4 |
|---|---|---|
| LMArena Instruction Following | 1404 | 1377 |
Long Context Solar Pro4 leads
GLM-4.5: 38.2 (#201), Solar Pro4: 42.1 (#130)
| Benchmark | GLM-4.5 | Solar Pro4 |
|---|---|---|
| LMArena Longer Query | 1412 | 1381 |
| Fiction.LiveBench | 58.3% | — |
Writing & Preference Too close to call
GLM-4.5: 57.5 (#127), Solar Pro4: 56.5 (#138)
| Benchmark | GLM-4.5 | Solar Pro4 |
|---|---|---|
| LMArena Text | 1430 | 1386 |
| LMArena Creative Writing | 1395 | 1316 |
| LMArena Multi-Turn | 1415 | 1385 |
| Short-Story Creative Writing | 73.4% | — |
| EQ-Bench Creative Writing | 1343 | — |
Frequently asked questions
Is GLM-4.5 better than Solar Pro4?
GLM-4.5 and Solar Pro4 score almost the same on the Noometry Index (42.0 vs 42.1), so choose on price, context window or the category you care about most.
Which is cheaper, GLM-4.5 or Solar Pro4?
Solar Pro4 is cheaper. It lists at $0.30 per million input tokens and $1.20 per million output tokens; GLM-4.5 lists at $0.60 and $2.20.
Is GLM-4.5 or Solar Pro4 better for coding?
GLM-4.5 scores higher on coding benchmarks: 41.4 versus 40.1 in the Noometry coding category.
Which has the bigger context window?
Solar Pro4 does, with 524K tokens against 131K.
How many benchmarks do GLM-4.5 and Solar Pro4 share?
17 benchmarks have published results for both models. GLM-4.5 has 27 scored results on Noometry and Solar Pro4 has 18.