Model comparison

GLM-4.5-Air vs Qwen3.5 Plus

Qwen3.5 Plus is the stronger model overall, scoring 42.3 to 38.7 on the Noometry Index. GLM-4.5-Air costs 2.1× less per token, which makes it the better buy when Qwen3.5 Plus's lead doesn't matter for your workload.

Last verified October 10, 2026. 1 shared benchmarks.

GLM-4.5-Air Z.ai (Zhipu)

38.7

Rank #169 Confirmed

Qwen3.5 Plus

Alibaba (Qwen)

42.3

Rank #103 Confirmed

Summary

They share 1 benchmark with published results for both. GLM-4.5-Air scores higher in 0 categories and Qwen3.5 Plus in 4 categories; 4 gaps are clear of the uncertainty.
The widest gap is in math, where Qwen3.5 Plus leads 47.9 to 33.8.
GLM-4.5-Air is cheaper at $0.20 / $1.10 per million input/output tokens, against $0.40 / $2.40 for Qwen3.5 Plus.
Qwen3.5 Plus accepts more context: 1M tokens versus 131K.
GLM-4.5-Air has downloadable open weights; the other is API-only.

Side by side

GLM-4.5-Air and Qwen3.5 Plus specifications
	GLM-4.5-Air	Qwen3.5 Plus
Provider	Z.ai (Zhipu)	Alibaba (Qwen)
Noometry Index	38.7	42.3
Released	2025-07-20	2026-02-16
Weights	Open	Proprietary
Context window	131K	1M
Max output	98K	66K
Input $ / M tokens	$0.20	$0.40
Output $ / M tokens	$1.10	$2.40
Results tracked	27	15

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Category by category

Coding Not comparable

GLM-4.5-Air: 34.5 (#225), Qwen3.5 Plus: —

Coding benchmarks
Benchmark	GLM-4.5-Air	Qwen3.5 Plus
GSO	2.9%	—
LMArena Coding	1397	—
ALE-Bench	—	621.92

Agentic & Tool Use Not comparable

GLM-4.5-Air: —, Qwen3.5 Plus: —

Agentic & Tool Use benchmarks
Benchmark	GLM-4.5-Air	Qwen3.5 Plus
Vending-Bench 2	—	0.54

Reasoning Qwen3.5 Plus leads

GLM-4.5-Air: 23.3 (#166), Qwen3.5 Plus: 32.0 (#67)

Reasoning benchmarks
Benchmark	GLM-4.5-Air	Qwen3.5 Plus
Kagi LLM Benchmark	43%	—
Chess Puzzles	—	22%
LMArena Hard Prompts	1379	—
Mystery Game Puzzles	—	17%
DTBench	—	80.5%
LMCA	—	36.4%
Epoch Capabilities Index	—	146.79
ForecastBench	59.2	—

Math Qwen3.5 Plus leads

GLM-4.5-Air: 33.8 (#166), Qwen3.5 Plus: 47.9 (#55)

Math benchmarks
Benchmark	GLM-4.5-Air	Qwen3.5 Plus
OTIS Mock AIME 2024-2025	—	86.7%
Omni-MATH	39.1%	—
LMArena Math	1396	—
FrontierMath (Feb 2025 set)	—	21%
FrontierMath Tier 4 (v1)	—	2.1%

Knowledge Qwen3.5 Plus leads

GLM-4.5-Air: 34.6 (#184), Qwen3.5 Plus: 46.0 (#78)

Knowledge benchmarks
Benchmark	GLM-4.5-Air	Qwen3.5 Plus
Vectara Hallucination Rate	9.3%	10.7%
GPQA Diamond	—	84.8%
Humanity's Last Exam	8.1%	—
SimpleQA Verified	—	25.4%
MMLU-Pro	76.2%	—
GPQA (HELM)	59.4%	—
LMArena Expert	1370	—

Multilingual Not comparable

GLM-4.5-Air: 49.4 (#130), Qwen3.5 Plus: —

Multilingual benchmarks
Benchmark	GLM-4.5-Air	Qwen3.5 Plus
LMArena Non-English	1366	—
LMArena Chinese	1427	—
LMArena French	1399	—
LMArena German	1376	—
LMArena Japanese	1348	—
LMArena Korean	1306	—
LMArena Russian	1373	—
LMArena Spanish	1385	—

Instruction Following Not comparable

GLM-4.5-Air: 69.8 (#165), Qwen3.5 Plus: —

Instruction Following benchmarks
Benchmark	GLM-4.5-Air	Qwen3.5 Plus
IFEval	81.2%	—
LMArena Instruction Following	1353	—

Long Context Qwen3.5 Plus leads

GLM-4.5-Air: 41.6 (#130), Qwen3.5 Plus: 42.9 (#109)

Long Context benchmarks
Benchmark	GLM-4.5-Air	Qwen3.5 Plus
CL-bench	—	19.8%
CL-bench Life	—	12.4%
LMArena Longer Query	1367	—

Writing & Preference Not comparable

GLM-4.5-Air: 56.1 (#134), Qwen3.5 Plus: —

Writing & Preference benchmarks
Benchmark	GLM-4.5-Air	Qwen3.5 Plus
LMArena Text	1384	—
LMArena Creative Writing	1343	—
WildBench	78.9%	—
LMArena Multi-Turn	1371	—

Frequently asked questions

Is GLM-4.5-Air better than Qwen3.5 Plus?

Which is cheaper, GLM-4.5-Air or Qwen3.5 Plus?

GLM-4.5-Air is cheaper. It lists at $0.20 per million input tokens and $1.10 per million output tokens; Qwen3.5 Plus lists at $0.40 and $2.40.

Which has the bigger context window?

Qwen3.5 Plus does, with 1M tokens against 131K.

How many benchmarks do GLM-4.5-Air and Qwen3.5 Plus share?

1 benchmark has published results for both models. GLM-4.5-Air has 27 scored results on Noometry and Qwen3.5 Plus has 15.