Model comparison

GLM-4.5-Air vs Muse Spark 1.1

Muse Spark 1.1 is the stronger model overall, scoring 49.9 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 1.1's lead doesn't matter for your workload.

Last verified October 12, 2026. 17 shared benchmarks.

GLM-4.5-Air Z.ai (Zhipu)

38.9

Rank #177 Confirmed

Muse Spark 1.1

Summary

They share 17 benchmarks with published results for both. GLM-4.5-Air scores higher in 0 categories and Muse Spark 1.1 in 8 categories; 8 gaps are clear of the uncertainty.
The widest gap is in reasoning, where Muse Spark 1.1 leads 47.1 to 24.1.
GLM-4.5-Air is cheaper at $0.20 / $1.10 per million input/output tokens, against $1.25 / $4.25 for Muse Spark 1.1.
Muse Spark 1.1 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 and Muse Spark 1.1 specifications
	GLM-4.5-Air	Muse Spark 1.1
Provider	Z.ai (Zhipu)	Meta
Noometry Index	38.9	49.9
Released	2025-07-20	2026-04-08
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 1.1 leads

GLM-4.5-Air: 33.3 (#259), Muse Spark 1.1: 51.3 (#40)

Coding benchmarks
Benchmark	GLM-4.5-Air	Muse Spark 1.1
LMArena Coding	1397	1498
DeepSWE	—	53.3%
LMArena WebDev	—	1542
SciCode	—	58.8%
GSO	2.9%	—

Agentic & Tool Use Not comparable

GLM-4.5-Air: —, Muse Spark 1.1: 30.8 (#73)

Agentic & Tool Use benchmarks
Benchmark	GLM-4.5-Air	Muse Spark 1.1
APEX-Agents	—	31.8%
τ²-bench Banking	—	40.5%
GBAEval	—	7.9%
GDP.pdf	—	15%
Vending-Bench 2	—	6,520

Reasoning Muse Spark 1.1 leads

GLM-4.5-Air: 24.1 (#166), Muse Spark 1.1: 47.1 (#44)

Reasoning benchmarks
Benchmark	GLM-4.5-Air	Muse Spark 1.1
LMArena Hard Prompts	1379	1486
Kagi LLM Benchmark	43%	—
NYT Connections (extended)	—	84.9%
CritPt	—	15.1%
DTBench	—	94.4%
LMCA	—	49.9%
Surface Evolver Bench	—	52.5%
Epoch Capabilities Index	—	154.21
ForecastBench	59.2	—

Math Muse Spark 1.1 leads

GLM-4.5-Air: 36.2 (#170), Muse Spark 1.1: 45.5 (#76)

Math benchmarks
Benchmark	GLM-4.5-Air	Muse Spark 1.1
LMArena Math	1396	1483
ProofBench	—	39%
Omni-MATH	39.1%	—

Knowledge Muse Spark 1.1 leads

GLM-4.5-Air: 35.0 (#191), Muse Spark 1.1: 53.1 (#59)

Knowledge benchmarks
Benchmark	GLM-4.5-Air	Muse Spark 1.1
LMArena Expert	1370	1478
Humanity's Last Exam	8.1%	—
SimpleQA Verified	—	57.8%
MMLU-Pro	76.2%	—
Vectara Hallucination Rate	9.3%	—
GPQA (HELM)	59.4%	—

Multimodal Not comparable

GLM-4.5-Air: —, Muse Spark 1.1: 42.6 (#29)

Multimodal benchmarks
Benchmark	GLM-4.5-Air	Muse Spark 1.1
LMArena Vision	—	1293
LMArena Document	—	1465

Multilingual Muse Spark 1.1 leads

GLM-4.5-Air: 49.1 (#135), Muse Spark 1.1: 56.7 (#17)

Multilingual benchmarks
Benchmark	GLM-4.5-Air	Muse Spark 1.1
LMArena Non-English	1366	1472
LMArena Chinese	1426	1518
LMArena French	1399	1494
LMArena German	1377	1466
LMArena Japanese	1348	1451
LMArena Korean	1308	1458
LMArena Russian	1373	1483
LMArena Spanish	1386	1464

Instruction Following Muse Spark 1.1 leads

GLM-4.5-Air: 69.6 (#171), Muse Spark 1.1: 76.5 (#39)

Instruction Following benchmarks
Benchmark	GLM-4.5-Air	Muse Spark 1.1
LMArena Instruction Following	1354	1457
IFEval	81.2%	—

Long Context Muse Spark 1.1 leads

GLM-4.5-Air: 41.6 (#135), Muse Spark 1.1: 44.8 (#58)

Long Context benchmarks
Benchmark	GLM-4.5-Air	Muse Spark 1.1
LMArena Longer Query	1366	1462

Writing & Preference Muse Spark 1.1 leads

GLM-4.5-Air: 55.9 (#139), Muse Spark 1.1: 73.4 (#11)

Writing & Preference benchmarks
Benchmark	GLM-4.5-Air	Muse Spark 1.1
LMArena Text	1384	1479
LMArena Creative Writing	1343	1437
LMArena Multi-Turn	1371	1485
EQ-Bench Creative Writing	—	1927
WildBench	78.9%	—
EQ-Bench 4	—	1260

Frequently asked questions

Is GLM-4.5-Air better than Muse Spark 1.1?

Which is cheaper, GLM-4.5-Air or Muse Spark 1.1?

GLM-4.5-Air is cheaper. It lists at $0.20 per million input tokens and $1.10 per million output tokens; Muse Spark 1.1 lists at $1.25 and $4.25.

Is GLM-4.5-Air or Muse Spark 1.1 better for coding?

Muse Spark 1.1 scores higher on coding benchmarks: 51.3 versus 33.3 in the Noometry coding category.

Which has the bigger context window?

Muse Spark 1.1 does, with 1.05M tokens against 131K.

How many benchmarks do GLM-4.5-Air and Muse Spark 1.1 share?

17 benchmarks have published results for both models. GLM-4.5-Air has 27 scored results on Noometry and Muse Spark 1.1 has 37.