Model comparison

GLM-5V-Turbo vs Step 3.5 Flash

GLM-5V-Turbo is the stronger model overall, scoring 43.8 to 42.3 on the Noometry Index. Step 3.5 Flash costs 13× less per token, which makes it the better buy when GLM-5V-Turbo's lead doesn't matter for your workload.

Last verified October 10, 2026. 16 shared benchmarks.

GLM-5V-Turbo Z.ai (Zhipu)

43.8

Rank #84 Confirmed

Step 3.5 Flash

StepFun

42.3

Rank #116 Confirmed

Summary

They share 16 benchmarks with published results for both. GLM-5V-Turbo scores higher in 6 categories and Step 3.5 Flash in 2 categories; 6 gaps are clear of the uncertainty.
The widest gap is in reasoning, where GLM-5V-Turbo leads 29.7 to 22.2.
Step 3.5 Flash is cheaper at $0.10 / $0.30 per million input/output tokens, against $1.20 / $4 for GLM-5V-Turbo.
Step 3.5 Flash accepts more context: 256K tokens versus 200K.
Step 3.5 Flash has downloadable open weights; the other is API-only.

Side by side

GLM-5V-Turbo and Step 3.5 Flash specifications
	GLM-5V-Turbo	Step 3.5 Flash
Provider	Z.ai (Zhipu)	StepFun
Noometry Index	43.8	42.3
Released	2026-04-01	2026-01-29
Weights	Proprietary	Open
Context window	200K	256K
Max output	131K	256K
Input $ / M tokens	$1.20	$0.10
Output $ / M tokens	$4	$0.30
Results tracked	19	19

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Category by category

Coding Too close to call

GLM-5V-Turbo: 42.1 (#111), Step 3.5 Flash: 42.4 (#105)

Coding benchmarks
Benchmark	GLM-5V-Turbo	Step 3.5 Flash
LMArena Coding	1466	1436
LMArena WebDev	1401	—

Reasoning GLM-5V-Turbo leads

GLM-5V-Turbo: 29.7 (#89), Step 3.5 Flash: 22.2 (#202)

Reasoning benchmarks
Benchmark	GLM-5V-Turbo	Step 3.5 Flash
LMArena Hard Prompts	1443	1411
NYT Connections (extended)	—	28.4%

Math Step 3.5 Flash leads

GLM-5V-Turbo: 39.4 (#106), Step 3.5 Flash: 42.6 (#84)

Math benchmarks
Benchmark	GLM-5V-Turbo	Step 3.5 Flash
LMArena Math	1441	1408
MathArena Final-Answer Competitions	—	66.8%

Knowledge Too close to call

GLM-5V-Turbo: 40.6 (#117), Step 3.5 Flash: 39.6 (#132)

Knowledge benchmarks
Benchmark	GLM-5V-Turbo	Step 3.5 Flash
LMArena Expert	1452	1421

Multimodal Not comparable

GLM-5V-Turbo: 40.9 (#42), Step 3.5 Flash: —

Multimodal benchmarks
Benchmark	GLM-5V-Turbo	Step 3.5 Flash
LMArena Vision	1264	—
LMArena Document	1416	—

Multilingual GLM-5V-Turbo leads

GLM-5V-Turbo: 53.0 (#73), Step 3.5 Flash: 50.5 (#119)

Multilingual benchmarks
Benchmark	GLM-5V-Turbo	Step 3.5 Flash
LMArena Non-English	1420	1385
LMArena Chinese	1488	1447
LMArena French	1444	1421
LMArena German	1423	1405
LMArena Korean	1396	1352
LMArena Russian	1431	1385
LMArena Spanish	1450	1419
LMArena Japanese	—	1354

Instruction Following GLM-5V-Turbo leads

GLM-5V-Turbo: 75.0 (#80), Step 3.5 Flash: 73.1 (#124)

Instruction Following benchmarks
Benchmark	GLM-5V-Turbo	Step 3.5 Flash
LMArena Instruction Following	1423	1385

Long Context GLM-5V-Turbo leads

GLM-5V-Turbo: 44.0 (#80), Step 3.5 Flash: 42.8 (#117)

Long Context benchmarks
Benchmark	GLM-5V-Turbo	Step 3.5 Flash
LMArena Longer Query	1438	1402

Writing & Preference GLM-5V-Turbo leads

GLM-5V-Turbo: 62.5 (#73), Step 3.5 Flash: 58.8 (#113)

Writing & Preference benchmarks
Benchmark	GLM-5V-Turbo	Step 3.5 Flash
LMArena Text	1437	1403
LMArena Creative Writing	1416	1357
LMArena Multi-Turn	1432	1405

Frequently asked questions

Is GLM-5V-Turbo better than Step 3.5 Flash?

Which is cheaper, GLM-5V-Turbo or Step 3.5 Flash?

Step 3.5 Flash is cheaper. It lists at $0.10 per million input tokens and $0.30 per million output tokens; GLM-5V-Turbo lists at $1.20 and $4.

Is GLM-5V-Turbo or Step 3.5 Flash better for coding?

They score almost the same on coding (42.1 vs 42.4); test both on your own repository before choosing.

Which has the bigger context window?

Step 3.5 Flash does, with 256K tokens against 200K.

How many benchmarks do GLM-5V-Turbo and Step 3.5 Flash share?

16 benchmarks have published results for both models. GLM-5V-Turbo has 19 scored results on Noometry and Step 3.5 Flash has 19.