Model comparison
GLM-4.5 vs Muse Spark 1.2
Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 42.0 on the Noometry Index. GLM-4.5 costs 2.0× less per token, which makes it the better buy when Muse Spark 1.2's lead doesn't matter for your workload.
Last verified . 16 shared benchmarks.
MetaSummary
- They share 16 benchmarks with published results for both. GLM-4.5 scores higher in 0 categories and Muse Spark 1.2 in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Muse Spark 1.2 leads 51.3 to 28.6.
- The biggest single-benchmark swing is WeirdML: 40.6% for GLM-4.5 and 60.3% for Muse Spark 1.2.
- GLM-4.5 is cheaper at $0.60 / $2.20 per million input/output tokens, against $1.25 / $4.25 for Muse Spark 1.2.
- Muse Spark 1.2 accepts more context: 1.05M tokens versus 131K.
- GLM-4.5 has downloadable open weights; the other is API-only.
Side by side
| GLM-4.5 | Muse Spark 1.2 | |
|---|---|---|
| Provider | Z.ai (Zhipu) | Meta |
| Noometry Index | 42.0 | 50.3 |
| Released | 2025-07-27 | 2026-08-05 |
| Weights | Open | Proprietary |
| Context window | 131K | 1.05M |
| Max output | 98K | 131K |
| Input $ / M tokens | $0.60 | $1.25 |
| Output $ / M tokens | $2.20 | $4.25 |
| Results tracked | 27 | 31 |
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Category by category
Coding Muse Spark 1.2 leads
GLM-4.5: 41.4 (#125), Muse Spark 1.2: 49.2 (#51)
| Benchmark | GLM-4.5 | Muse Spark 1.2 |
|---|---|---|
| WeirdML | 40.6% | 60.3% |
| LMArena Coding | 1434 | 1495 |
| DeepSWE | — | 54.9% |
| SWE-bench Verified (bash only) | 54.2% | — |
| LMArena WebDev | — | 1533 |
| FrontierSWE | — | 12% |
| SciCode | — | 56.4% |
| ALE-Bench | 344.82 | — |
| AlgoTune | 1.52 | — |
Agentic & Tool Use Not comparable
GLM-4.5: —, Muse Spark 1.2: 29.4 (#87)
| Benchmark | GLM-4.5 | Muse Spark 1.2 |
|---|---|---|
| APEX-Agents | — | 36.4% |
| GDP.pdf | — | 16% |
Reasoning Muse Spark 1.2 leads
GLM-4.5: 28.6 (#100), Muse Spark 1.2: 51.3 (#34)
| Benchmark | GLM-4.5 | Muse Spark 1.2 |
|---|---|---|
| LMArena Hard Prompts | 1429 | 1486 |
| SimpleBench | — | 74.5% |
| Kagi LLM Benchmark | 57.9% | — |
| NYT Connections (extended) | — | 79.2% |
| CritPt | — | 17.7% |
| DTBench | — | 94.7% |
| LMCA | — | 48.4% |
| Epoch Capabilities Index | — | 154.87 |
Math Muse Spark 1.2 leads
GLM-4.5: 39.0 (#116), Muse Spark 1.2: 46.4 (#70)
| Benchmark | GLM-4.5 | Muse Spark 1.2 |
|---|---|---|
| LMArena Math | 1427 | 1471 |
| ProofBench | — | 43% |
Knowledge Muse Spark 1.2 leads
GLM-4.5: 35.9 (#179), Muse Spark 1.2: 54.1 (#53)
| Benchmark | GLM-4.5 | Muse Spark 1.2 |
|---|---|---|
| LMArena Expert | 1433 | 1480 |
| Humanity's Last Exam | 8.3% | — |
| SimpleQA Verified | — | 60.3% |
| Confabulations | 11.3% | — |
Multimodal Not comparable
GLM-4.5: —, Muse Spark 1.2: 43.4 (#25)
| Benchmark | GLM-4.5 | Muse Spark 1.2 |
|---|---|---|
| LMArena Vision | — | 1305 |
Multilingual Muse Spark 1.2 leads
GLM-4.5: 52.8 (#77), Muse Spark 1.2: 57.1 (#11)
| Benchmark | GLM-4.5 | Muse Spark 1.2 |
|---|---|---|
| LMArena Non-English | 1417 | 1478 |
| LMArena Chinese | 1465 | 1511 |
| LMArena French | 1418 | 1513 |
| LMArena Russian | 1414 | 1487 |
| LMArena Spanish | 1454 | 1498 |
| LMArena German | 1407 | — |
| LMArena Japanese | 1415 | — |
| LMArena Korean | 1380 | — |
Instruction Following Muse Spark 1.2 leads
GLM-4.5: 74.1 (#104), Muse Spark 1.2: 76.7 (#36)
| Benchmark | GLM-4.5 | Muse Spark 1.2 |
|---|---|---|
| LMArena Instruction Following | 1404 | 1461 |
Long Context Muse Spark 1.2 leads
GLM-4.5: 38.2 (#201), Muse Spark 1.2: 45.2 (#48)
| Benchmark | GLM-4.5 | Muse Spark 1.2 |
|---|---|---|
| LMArena Longer Query | 1412 | 1475 |
| Fiction.LiveBench | 58.3% | — |
Writing & Preference Muse Spark 1.2 leads
GLM-4.5: 57.5 (#127), Muse Spark 1.2: 72.3 (#14)
| Benchmark | GLM-4.5 | Muse Spark 1.2 |
|---|---|---|
| LMArena Text | 1430 | 1482 |
| LMArena Creative Writing | 1395 | 1449 |
| EQ-Bench Creative Writing | 1343 | 1840 |
| LMArena Multi-Turn | 1415 | 1494 |
| Short-Story Creative Writing | 73.4% | — |
Frequently asked questions
Is GLM-4.5 better than Muse Spark 1.2?
Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 42.0 on the Noometry Index. GLM-4.5 costs 2.0× less per token, which makes it the better buy when Muse Spark 1.2's lead doesn't matter for your workload.
Which is cheaper, GLM-4.5 or Muse Spark 1.2?
GLM-4.5 is cheaper. It lists at $0.60 per million input tokens and $2.20 per million output tokens; Muse Spark 1.2 lists at $1.25 and $4.25.
Is GLM-4.5 or Muse Spark 1.2 better for coding?
Muse Spark 1.2 scores higher on coding benchmarks: 49.2 versus 41.4 in the Noometry coding category.
Which has the bigger context window?
Muse Spark 1.2 does, with 1.05M tokens against 131K.
How many benchmarks do GLM-4.5 and Muse Spark 1.2 share?
16 benchmarks have published results for both models. GLM-4.5 has 27 scored results on Noometry and Muse Spark 1.2 has 31.