Noometry

Model comparison

GPT-5.6 Terra vs Hy3

GPT-5.6 Terra is the stronger model overall, scoring 59.2 to 44.2 on the Noometry Index. Hy3 costs 20× less per token, which makes it the better buy when GPT-5.6 Terra's lead doesn't matter for your workload.

Last verified . 19 shared benchmarks.

GPT-5.6 Terra OpenAI

59.2

Rank #17 Confirmed

Hy3 Tencent

44.2

Rank #79 Confirmed

Summary

  • They share 19 benchmarks with published results for both. GPT-5.6 Terra scores higher in 8 categories and Hy3 in 0 categories; 6 gaps are clear of the uncertainty.
  • The widest gap is in math, where GPT-5.6 Terra leads 81.6 to 40.1.
  • The biggest single-benchmark swing is NYT Connections (extended): 78.4% for GPT-5.6 Terra and 41.2% for Hy3.
  • Hy3 is cheaper at $0.13 / $0.53 per million input/output tokens, against $2 / $12 for GPT-5.6 Terra.
  • GPT-5.6 Terra accepts more context: 1.05M tokens versus 262K.
  • Hy3 has downloadable open weights; the other is API-only.

Side by side

GPT-5.6 TerraHy3
ProviderOpenAITencent
Noometry Index59.244.2
Released2026-07-092026-07-06
WeightsProprietaryOpen
Context window1.05M262K
Max output128K128K
Input $ / M tokens$2$0.13
Output $ / M tokens$12$0.53
Results tracked5219

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Category by category

Coding GPT-5.6 Terra leads

GPT-5.6 Terra: 57.7 (#19), Hy3: 46.8 (#63)

BenchmarkGPT-5.6 TerraHy3
LMArena WebDev15221508
LMArena Coding14841464
DeepSWE69.6%—
FrontierCode41.3%—
CursorBench41.3%—
SciCode55%—
WeirdML78.3%—
ALE-Bench1,951—

Agentic & Tool Use Not comparable

GPT-5.6 Terra: 40.1 (#25), Hy3: —

BenchmarkGPT-5.6 TerraHy3
APEX-Agents58.2%—
BALROG53.2%—
GDP.pdf24.7%—
Vending-Bench 27,343—

Reasoning GPT-5.6 Terra leads

GPT-5.6 Terra: 60.7 (#21), Hy3: 26.1 (#136)

BenchmarkGPT-5.6 TerraHy3
NYT Connections (extended)78.4%41.2%
LMArena Hard Prompts14681447
ARC-AGI-283.9%—
SimpleBench48.9%—
Kagi LLM Benchmark51.3%—
ARC-AGI-196.5%—
CritPt30%—
Chess Puzzles54%—
Mystery Game Puzzles35%—
DTBench93.3%—
LMCA55%—
Surface Evolver Bench83.8%—
Epoch Capabilities Index159.62—

Math GPT-5.6 Terra leads

GPT-5.6 Terra: 81.6 (#12), Hy3: 40.1 (#93)

BenchmarkGPT-5.6 TerraHy3
LMArena Math14661475
FrontierMath (Tiers 1-3)86%—
FrontierMath Tier 470.7%—
OTIS Mock AIME 2024-202599.7%—
ProofBench74%—

Knowledge GPT-5.6 Terra leads

GPT-5.6 Terra: 61.2 (#30), Hy3: 40.8 (#114)

BenchmarkGPT-5.6 TerraHy3
LMArena Expert14921460
GPQA Diamond93.3%—
SimpleQA Verified43.2%—

Multimodal Not comparable

GPT-5.6 Terra: 47.3 (#11), Hy3: —

BenchmarkGPT-5.6 TerraHy3
LMArena Vision1271—
Blueprint-Bench 230.8%—
Furniture Assembly54.2%—
LMArena Document1472—

Multilingual Too close to call

GPT-5.6 Terra: 54.4 (#44), Hy3: 53.5 (#65)

BenchmarkGPT-5.6 TerraHy3
LMArena Non-English14391426
LMArena Chinese15131493
LMArena French14711461
LMArena German14601439
LMArena Japanese14571392
LMArena Korean14251395
LMArena Russian14501432
LMArena Spanish14481456

Instruction Following GPT-5.6 Terra leads

GPT-5.6 Terra: 76.4 (#40), Hy3: 75.1 (#70)

BenchmarkGPT-5.6 TerraHy3
LMArena Instruction Following14541426

Long Context Too close to call

GPT-5.6 Terra: 44.4 (#68), Hy3: 44.1 (#75)

BenchmarkGPT-5.6 TerraHy3
LMArena Longer Query14511442

Writing & Preference GPT-5.6 Terra leads

GPT-5.6 Terra: 70.2 (#23), Hy3: 62.2 (#81)

BenchmarkGPT-5.6 TerraHy3
LMArena Text14471439
LMArena Creative Writing14101402
LMArena Multi-Turn14491436
EQ-Bench Creative Writing1855—
EQ-Bench 41234—

Frequently asked questions

Is GPT-5.6 Terra better than Hy3?

GPT-5.6 Terra is the stronger model overall, scoring 59.2 to 44.2 on the Noometry Index. Hy3 costs 20× less per token, which makes it the better buy when GPT-5.6 Terra's lead doesn't matter for your workload.

Which is cheaper, GPT-5.6 Terra or Hy3?

Hy3 is cheaper. It lists at $0.13 per million input tokens and $0.53 per million output tokens; GPT-5.6 Terra lists at $2 and $12.

Is GPT-5.6 Terra or Hy3 better for coding?

GPT-5.6 Terra scores higher on coding benchmarks: 57.7 versus 46.8 in the Noometry coding category.

Which has the bigger context window?

GPT-5.6 Terra does, with 1.05M tokens against 262K.

How many benchmarks do GPT-5.6 Terra and Hy3 share?

19 benchmarks have published results for both models. GPT-5.6 Terra has 52 scored results on Noometry and Hy3 has 19.

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