Model comparison

Seed 2.0 Pro vs GPT-5.3 Chat

Seed 2.0 Pro and GPT-5.3 Chat score almost the same on the Noometry Index (43.2 vs 42.8), so choose on price, context window or the category you care about most.

Last verified October 10, 2026. 17 shared benchmarks.

Seed 2.0 Pro

ByteDance Seed

43.2

Rank #96 Confirmed

GPT-5.3 Chat OpenAI

42.8

Rank #109 Confirmed

Summary

They share 17 benchmarks with published results for both. Seed 2.0 Pro scores higher in 6 categories and GPT-5.3 Chat in 2 categories; 7 gaps are clear of the uncertainty.
The widest gap is in reasoning, where GPT-5.3 Chat leads 28.5 to 24.1.
Seed 2.0 Pro is cheaper at $0.50 / $3 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
Seed 2.0 Pro accepts more context: 256K tokens versus 128K.

Side by side

Seed 2.0 Pro and GPT-5.3 Chat specifications
	Seed 2.0 Pro	GPT-5.3 Chat
Provider	ByteDance Seed	OpenAI
Noometry Index	43.2	42.8
Released	2026-02-14	2026-03-03
Weights	Proprietary	Proprietary
Context window	256K	128K
Max output	128K	16K
Input $ / M tokens	$0.50	$1.75
Output $ / M tokens	$3	$14
Results tracked	20	18

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Category by category

Coding Seed 2.0 Pro leads

Seed 2.0 Pro: 43.5 (#86), GPT-5.3 Chat: 41.4 (#124)

Coding benchmarks
Benchmark	Seed 2.0 Pro	GPT-5.3 Chat
LMArena Coding	1472	1408

Reasoning GPT-5.3 Chat leads

Seed 2.0 Pro: 24.1 (#165), GPT-5.3 Chat: 28.5 (#102)

Reasoning benchmarks
Benchmark	Seed 2.0 Pro	GPT-5.3 Chat
LMArena Hard Prompts	1453	1399
NYT Connections (extended)	28.4%	—
Thematic Generalization	57.1%	—

Math Seed 2.0 Pro leads

Seed 2.0 Pro: 39.3 (#108), GPT-5.3 Chat: 38.2 (#142)

Math benchmarks
Benchmark	Seed 2.0 Pro	GPT-5.3 Chat
LMArena Math	1439	1389

Knowledge Seed 2.0 Pro leads

Seed 2.0 Pro: 40.2 (#122), GPT-5.3 Chat: 38.8 (#140)

Knowledge benchmarks
Benchmark	Seed 2.0 Pro	GPT-5.3 Chat
LMArena Expert	1440	1397

Multimodal Not comparable

Seed 2.0 Pro: 41.5 (#35), GPT-5.3 Chat: —

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

Multilingual Seed 2.0 Pro leads

Seed 2.0 Pro: 54.5 (#39), GPT-5.3 Chat: 50.3 (#124)

Multilingual benchmarks
Benchmark	Seed 2.0 Pro	GPT-5.3 Chat
LMArena Non-English	1441	1382
LMArena Chinese	1489	1432
LMArena French	1471	1397
LMArena German	1442	1384
LMArena Japanese	1408	1352
LMArena Korean	1411	1346
LMArena Russian	1449	1400
LMArena Spanish	1460	1371

Instruction Following Seed 2.0 Pro leads

Seed 2.0 Pro: 74.5 (#91), GPT-5.3 Chat: 72.8 (#129)

Instruction Following benchmarks
Benchmark	Seed 2.0 Pro	GPT-5.3 Chat
LMArena Instruction Following	1414	1378

Long Context Seed 2.0 Pro leads

Seed 2.0 Pro: 43.6 (#90), GPT-5.3 Chat: 42.6 (#120)

Long Context benchmarks
Benchmark	Seed 2.0 Pro	GPT-5.3 Chat
LMArena Longer Query	1428	1396

Writing & Preference Too close to call

Seed 2.0 Pro: 62.9 (#69), GPT-5.3 Chat: 63.1 (#68)

Writing & Preference benchmarks
Benchmark	Seed 2.0 Pro	GPT-5.3 Chat
LMArena Text	1448	1389
LMArena Creative Writing	1406	1355
LMArena Multi-Turn	1441	1412
EQ-Bench Creative Writing	—	1690

Frequently asked questions

Is Seed 2.0 Pro better than GPT-5.3 Chat?

Seed 2.0 Pro and GPT-5.3 Chat score almost the same on the Noometry Index (43.2 vs 42.8), so choose on price, context window or the category you care about most.

Which is cheaper, Seed 2.0 Pro or GPT-5.3 Chat?

Seed 2.0 Pro is cheaper. It lists at $0.50 per million input tokens and $3 per million output tokens; GPT-5.3 Chat lists at $1.75 and $14.

Is Seed 2.0 Pro or GPT-5.3 Chat better for coding?

Seed 2.0 Pro scores higher on coding benchmarks: 43.5 versus 41.4 in the Noometry coding category.

Which has the bigger context window?

Seed 2.0 Pro does, with 256K tokens against 128K.

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

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