Model comparison
GLM-4.5-Air vs Muse Spark 1.3
Muse Spark 1.3 is the stronger model overall, scoring 54.8 to 38.9 on the Noometry Index. GLM-4.5-Air costs 4.7× less per token, which makes it the better buy when Muse Spark 1.3's lead doesn't matter for your workload.
Last verified . 17 shared benchmarks.
MetaSummary
- They share 17 benchmarks with published results for both. GLM-4.5-Air scores higher in 0 categories and Muse Spark 1.3 in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Muse Spark 1.3 leads 73.1 to 36.2.
- GLM-4.5-Air is cheaper at $0.20 / $1.10 per million input/output tokens, against $1.25 / $4.25 for Muse Spark 1.3.
- Muse Spark 1.3 accepts more context: 1.05M tokens versus 131K.
- GLM-4.5-Air has downloadable open weights; the other is API-only.
Side by side
| GLM-4.5-Air | Muse Spark 1.3 | |
|---|---|---|
| Provider | Z.ai (Zhipu) | Meta |
| Noometry Index | 38.9 | 54.8 |
| Released | 2025-07-20 | 2026-09-02 |
| Weights | Open | Proprietary |
| Context window | 131K | 1.05M |
| Max output | 98K | 131K |
| Input $ / M tokens | $0.20 | $1.25 |
| Output $ / M tokens | $1.10 | $4.25 |
| Results tracked | 27 | 37 |
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Category by category
Coding Muse Spark 1.3 leads
GLM-4.5-Air: 33.3 (#259), Muse Spark 1.3: 56.6 (#21)
| Benchmark | GLM-4.5-Air | Muse Spark 1.3 |
|---|---|---|
| LMArena Coding | 1397 | 1514 |
| CursorBench | — | 41.6% |
| LMArena WebDev | — | 1657 |
| SciCode | — | 59.7% |
| GSO | 2.9% | — |
Agentic & Tool Use Not comparable
GLM-4.5-Air: —, Muse Spark 1.3: 38.6 (#30)
| Benchmark | GLM-4.5-Air | Muse Spark 1.3 |
|---|---|---|
| APEX-Agents | — | 57.8% |
| GDP.pdf | — | 27.6% |
Reasoning Muse Spark 1.3 leads
GLM-4.5-Air: 24.1 (#166), Muse Spark 1.3: 54.0 (#27)
| Benchmark | GLM-4.5-Air | Muse Spark 1.3 |
|---|---|---|
| LMArena Hard Prompts | 1379 | 1503 |
| Kagi LLM Benchmark | 43% | — |
| NYT Connections (extended) | — | 85.1% |
| CritPt | — | 26% |
| Chess Puzzles | — | 38% |
| Mystery Game Puzzles | — | 25% |
| DTBench | — | 96.5% |
| LMCA | — | 53.9% |
| Bench to the Future 3 | — | 0.14 |
| Epoch Capabilities Index | — | 156.75 |
| ForecastBench | 59.2 | — |
Math Muse Spark 1.3 leads
GLM-4.5-Air: 36.2 (#170), Muse Spark 1.3: 73.1 (#21)
| Benchmark | GLM-4.5-Air | Muse Spark 1.3 |
|---|---|---|
| LMArena Math | 1396 | 1494 |
| FrontierMath (Tiers 1-3) | — | 74.4% |
| FrontierMath Tier 4 | — | 46.3% |
| OTIS Mock AIME 2024-2025 | — | 99.2% |
| ProofBench | — | 58% |
| Omni-MATH | 39.1% | — |
Knowledge Muse Spark 1.3 leads
GLM-4.5-Air: 35.0 (#191), Muse Spark 1.3: 42.6 (#95)
| Benchmark | GLM-4.5-Air | Muse Spark 1.3 |
|---|---|---|
| LMArena Expert | 1370 | 1516 |
| Humanity's Last Exam | 8.1% | — |
| MMLU-Pro | 76.2% | — |
| Vectara Hallucination Rate | 9.3% | — |
| GPQA (HELM) | 59.4% | — |
Multimodal Not comparable
GLM-4.5-Air: —, Muse Spark 1.3: 43.7 (#22)
| Benchmark | GLM-4.5-Air | Muse Spark 1.3 |
|---|---|---|
| LMArena Vision | — | 1309 |
| LMArena Document | — | 1471 |
Multilingual Muse Spark 1.3 leads
GLM-4.5-Air: 49.1 (#135), Muse Spark 1.3: 57.4 (#8)
| Benchmark | GLM-4.5-Air | Muse Spark 1.3 |
|---|---|---|
| LMArena Non-English | 1366 | 1481 |
| LMArena Chinese | 1426 | 1529 |
| LMArena French | 1399 | 1524 |
| LMArena German | 1377 | 1515 |
| LMArena Japanese | 1348 | 1474 |
| LMArena Korean | 1308 | 1501 |
| LMArena Russian | 1373 | 1490 |
| LMArena Spanish | 1386 | 1490 |
Instruction Following Muse Spark 1.3 leads
GLM-4.5-Air: 69.6 (#171), Muse Spark 1.3: 77.5 (#22)
| Benchmark | GLM-4.5-Air | Muse Spark 1.3 |
|---|---|---|
| LMArena Instruction Following | 1354 | 1477 |
| IFEval | 81.2% | — |
Long Context Muse Spark 1.3 leads
GLM-4.5-Air: 41.6 (#135), Muse Spark 1.3: 45.6 (#32)
| Benchmark | GLM-4.5-Air | Muse Spark 1.3 |
|---|---|---|
| LMArena Longer Query | 1366 | 1488 |
Writing & Preference Muse Spark 1.3 leads
GLM-4.5-Air: 55.9 (#139), Muse Spark 1.3: 73.6 (#9)
| Benchmark | GLM-4.5-Air | Muse Spark 1.3 |
|---|---|---|
| LMArena Text | 1384 | 1490 |
| LMArena Creative Writing | 1343 | 1455 |
| LMArena Multi-Turn | 1371 | 1482 |
| EQ-Bench Creative Writing | — | 1906 |
| WildBench | 78.9% | — |
Frequently asked questions
Is GLM-4.5-Air better than Muse Spark 1.3?
Muse Spark 1.3 is the stronger model overall, scoring 54.8 to 38.9 on the Noometry Index. GLM-4.5-Air costs 4.7× less per token, which makes it the better buy when Muse Spark 1.3's lead doesn't matter for your workload.
Which is cheaper, GLM-4.5-Air or Muse Spark 1.3?
GLM-4.5-Air is cheaper. It lists at $0.20 per million input tokens and $1.10 per million output tokens; Muse Spark 1.3 lists at $1.25 and $4.25.
Is GLM-4.5-Air or Muse Spark 1.3 better for coding?
Muse Spark 1.3 scores higher on coding benchmarks: 56.6 versus 33.3 in the Noometry coding category.
Which has the bigger context window?
Muse Spark 1.3 does, with 1.05M tokens against 131K.
How many benchmarks do GLM-4.5-Air and Muse Spark 1.3 share?
17 benchmarks have published results for both models. GLM-4.5-Air has 27 scored results on Noometry and Muse Spark 1.3 has 37.