Model comparison

Seed 2.0 Pro vs GLM-5.3

GLM-5.3 is the stronger model overall, scoring 54.8 to 43.2 on the Noometry Index. Seed 2.0 Pro costs 1.9× less per token, which makes it the better buy when GLM-5.3's lead doesn't matter for your workload.

Last verified October 10, 2026. 18 shared benchmarks.

Seed 2.0 Pro

ByteDance Seed

43.2

Rank #96 Confirmed

GLM-5.3 Z.ai (Zhipu)

54.8

Rank #26 Confirmed

Summary

They share 18 benchmarks with published results for both. Seed 2.0 Pro scores higher in 0 categories and GLM-5.3 in 8 categories; 8 gaps are clear of the uncertainty.
The widest gap is in math, where GLM-5.3 leads 62.3 to 39.3.
The biggest single-benchmark swing is NYT Connections (extended): 28.4% for Seed 2.0 Pro and 74.2% for GLM-5.3.
Seed 2.0 Pro is cheaper at $0.50 / $3 per million input/output tokens, against $1.40 / $4.40 for GLM-5.3.
GLM-5.3 accepts more context: 1M tokens versus 256K.
GLM-5.3 has downloadable open weights; the other is API-only.

Side by side

Seed 2.0 Pro and GLM-5.3 specifications
	Seed 2.0 Pro	GLM-5.3
Provider	ByteDance Seed	Z.ai (Zhipu)
Noometry Index	43.2	54.8
Released	2026-02-14	2026-08-14
Weights	Proprietary	Open
Context window	256K	1M
Max output	128K	131K
Input $ / M tokens	$0.50	$1.40
Output $ / M tokens	$3	$4.40
Results tracked	20	42

Sponsored placements are available on pages like this one. Advertise on Noometry

Category by category

Coding GLM-5.3 leads

Seed 2.0 Pro: 43.5 (#86), GLM-5.3: 59.5 (#14)

Coding benchmarks
Benchmark	Seed 2.0 Pro	GLM-5.3
LMArena Coding	1472	1496
DeepSWE	—	69%
FrontierCode	—	40.1%
CursorBench	—	42.6%
LMArena WebDev	—	1622
FrontierSWE	—	30.2%
SciCode	—	59%
WeirdML	—	75.4%
ALE-Bench	—	1,317

Agentic & Tool Use Not comparable

Seed 2.0 Pro: —, GLM-5.3: 36.4 (#38)

Agentic & Tool Use benchmarks
Benchmark	Seed 2.0 Pro	GLM-5.3
APEX-Agents	—	56.6%
Vending-Bench 2	—	8,164

Reasoning GLM-5.3 leads

Seed 2.0 Pro: 24.1 (#165), GLM-5.3: 46.1 (#46)

Reasoning benchmarks
Benchmark	Seed 2.0 Pro	GLM-5.3
NYT Connections (extended)	28.4%	74.2%
LMArena Hard Prompts	1453	1489
CritPt	—	19.1%
Chess Puzzles	—	21%
Thematic Generalization	57.1%	—
Mystery Game Puzzles	—	33%
DTBench	—	87.7%
LMCA	—	55.5%
Bench to the Future 3	—	0.15
Epoch Capabilities Index	—	155.61

Math GLM-5.3 leads

Seed 2.0 Pro: 39.3 (#108), GLM-5.3: 62.3 (#33)

Math benchmarks
Benchmark	Seed 2.0 Pro	GLM-5.3
LMArena Math	1439	1489
FrontierMath (Tiers 1-3)	—	68.8%
FrontierMath Tier 4	—	29.3%
OTIS Mock AIME 2024-2025	—	91.1%
ProofBench	—	49%

Knowledge GLM-5.3 leads

Seed 2.0 Pro: 40.2 (#122), GLM-5.3: 58.3 (#37)

Knowledge benchmarks
Benchmark	Seed 2.0 Pro	GLM-5.3
LMArena Expert	1440	1516
GPQA Diamond	—	90.9%
SimpleQA Verified	—	41%

Multimodal Not comparable

Seed 2.0 Pro: 41.5 (#35), GLM-5.3: —

Multimodal benchmarks
Benchmark	Seed 2.0 Pro	GLM-5.3
LMArena Vision	1274	—

Multilingual GLM-5.3 leads

Seed 2.0 Pro: 54.5 (#39), GLM-5.3: 55.7 (#28)

Multilingual benchmarks
Benchmark	Seed 2.0 Pro	GLM-5.3
LMArena Non-English	1441	1457
LMArena Chinese	1489	1528
LMArena French	1471	1499
LMArena German	1442	1499
LMArena Japanese	1408	1453
LMArena Korean	1411	1472
LMArena Russian	1449	1463
LMArena Spanish	1460	1460

Instruction Following GLM-5.3 leads

Seed 2.0 Pro: 74.5 (#91), GLM-5.3: 77.5 (#23)

Instruction Following benchmarks
Benchmark	Seed 2.0 Pro	GLM-5.3
LMArena Instruction Following	1414	1477

Long Context GLM-5.3 leads

Seed 2.0 Pro: 43.6 (#90), GLM-5.3: 45.4 (#41)

Long Context benchmarks
Benchmark	Seed 2.0 Pro	GLM-5.3
LMArena Longer Query	1428	1482

Writing & Preference GLM-5.3 leads

Seed 2.0 Pro: 62.9 (#69), GLM-5.3: 75.7 (#6)

Writing & Preference benchmarks
Benchmark	Seed 2.0 Pro	GLM-5.3
LMArena Text	1448	1471
LMArena Creative Writing	1406	1457
LMArena Multi-Turn	1441	1472
EQ-Bench Creative Writing	—	2075

Frequently asked questions

Is Seed 2.0 Pro better than GLM-5.3?

Which is cheaper, Seed 2.0 Pro or GLM-5.3?

Seed 2.0 Pro is cheaper. It lists at $0.50 per million input tokens and $3 per million output tokens; GLM-5.3 lists at $1.40 and $4.40.

Is Seed 2.0 Pro or GLM-5.3 better for coding?

GLM-5.3 scores higher on coding benchmarks: 59.5 versus 43.5 in the Noometry coding category.

Which has the bigger context window?

GLM-5.3 does, with 1M tokens against 256K.

How many benchmarks do Seed 2.0 Pro and GLM-5.3 share?

18 benchmarks have published results for both models. Seed 2.0 Pro has 20 scored results on Noometry and GLM-5.3 has 42.