Model comparison

GPT-5.3 Chat vs Hy3

Hy3 is the stronger model overall, scoring 44.2 to 42.8 on the Noometry Index.

Last verified October 11, 2026. 17 shared benchmarks.

GPT-5.3 Chat OpenAI

42.8

Rank #109 Confirmed

Hy3

Tencent

44.2

Rank #79 Confirmed

Summary

They share 17 benchmarks with published results for both. GPT-5.3 Chat scores higher in 2 categories and Hy3 in 6 categories; 7 gaps are clear of the uncertainty.
The widest gap is in coding, where Hy3 leads 46.8 to 41.4.
Hy3 is cheaper at $0.13 / $0.53 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
Hy3 accepts more context: 262K tokens versus 128K.
Hy3 has downloadable open weights; the other is API-only.

Side by side

GPT-5.3 Chat and Hy3 specifications
	GPT-5.3 Chat	Hy3
Provider	OpenAI	Tencent
Noometry Index	42.8	44.2
Released	2026-03-03	2026-07-06
Weights	Proprietary	Open
Context window	128K	262K
Max output	16K	128K
Input $ / M tokens	$1.75	$0.13
Output $ / M tokens	$14	$0.53
Results tracked	18	19

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

Category by category

Coding Hy3 leads

GPT-5.3 Chat: 41.4 (#124), Hy3: 46.8 (#63)

Coding benchmarks
Benchmark	GPT-5.3 Chat	Hy3
LMArena Coding	1408	1464
LMArena WebDev	—	1508

Reasoning GPT-5.3 Chat leads

GPT-5.3 Chat: 28.5 (#102), Hy3: 26.1 (#136)

Reasoning benchmarks
Benchmark	GPT-5.3 Chat	Hy3
LMArena Hard Prompts	1399	1447
NYT Connections (extended)	—	41.2%

Math Hy3 leads

GPT-5.3 Chat: 38.2 (#142), Hy3: 40.1 (#93)

Math benchmarks
Benchmark	GPT-5.3 Chat	Hy3
LMArena Math	1389	1475

Knowledge Hy3 leads

GPT-5.3 Chat: 38.8 (#140), Hy3: 40.8 (#114)

Knowledge benchmarks
Benchmark	GPT-5.3 Chat	Hy3
LMArena Expert	1397	1460

Multilingual Hy3 leads

GPT-5.3 Chat: 50.3 (#124), Hy3: 53.5 (#65)

Multilingual benchmarks
Benchmark	GPT-5.3 Chat	Hy3
LMArena Non-English	1382	1426
LMArena Chinese	1432	1493
LMArena French	1397	1461
LMArena German	1384	1439
LMArena Japanese	1352	1392
LMArena Korean	1346	1395
LMArena Russian	1400	1432
LMArena Spanish	1371	1456

Instruction Following Hy3 leads

GPT-5.3 Chat: 72.8 (#129), Hy3: 75.1 (#70)

Instruction Following benchmarks
Benchmark	GPT-5.3 Chat	Hy3
LMArena Instruction Following	1378	1426

Long Context Hy3 leads

GPT-5.3 Chat: 42.6 (#120), Hy3: 44.1 (#75)

Long Context benchmarks
Benchmark	GPT-5.3 Chat	Hy3
LMArena Longer Query	1396	1442

Writing & Preference Too close to call

GPT-5.3 Chat: 63.1 (#68), Hy3: 62.2 (#81)

Writing & Preference benchmarks
Benchmark	GPT-5.3 Chat	Hy3
LMArena Text	1389	1439
LMArena Creative Writing	1355	1402
LMArena Multi-Turn	1412	1436
EQ-Bench Creative Writing	1690	—

Frequently asked questions

Is GPT-5.3 Chat better than Hy3?

Hy3 is the stronger model overall, scoring 44.2 to 42.8 on the Noometry Index.

Which is cheaper, GPT-5.3 Chat or Hy3?

Hy3 is cheaper. It lists at $0.13 per million input tokens and $0.53 per million output tokens; GPT-5.3 Chat lists at $1.75 and $14.

Is GPT-5.3 Chat or Hy3 better for coding?

Hy3 scores higher on coding benchmarks: 46.8 versus 41.4 in the Noometry coding category.

Which has the bigger context window?

Hy3 does, with 262K tokens against 128K.

How many benchmarks do GPT-5.3 Chat and Hy3 share?

17 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Hy3 has 19.