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gpt-oss-120b vs Hy3

Updated October 21, 2026. 39 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace gpt-oss-120b Replace Hy3
gpt-oss-120bOpenAI
Coding
34.5
Overall
11.6
Output $/M
$0.60
0
Hy3Tencent
Coding
43.9
Overall
No data
Output $/M
$0.528
39
vs boards won of 39 shared

Decision reading

Pick Hy3 for coding: it scores 43.9 on the Vibe Coding Index against 34.5 for gpt-oss-120b, though on 1 benchmark against 2.

gpt-oss-120b is neither cheaper nor larger in context, and leads no benchmark both models were measured on.

Model Agpt-oss-120bOpenAI34.5/1002 independent benchmarks$0.51 per solved taskModel BHy3Tencent43.9/1001 independent benchmarkNo cost per solved task
Shared results
39
gpt-oss-120b only
39
Hy3 only
5
Like-for-like categories
6 of 9

Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

At a glance

Coding index
gpt-oss-120b 34.5 from 2 benchmarks, Hy3 43.9 from 1 benchmark.
Widest category
Web design, 31.8 points apart on average over 6 shared benchmarks.
Widest single gap
Design Arena: 3D: gpt-oss-120b 901 against Hy3 1233, 41.5 points apart on a 0 to 100 scale.
Output price
gpt-oss-120b $0.60 against Hy3 $0.528 per million output tokens, 1.1x apart.
Context window
gpt-oss-120b takes 131K tokens, Hy3 262K.

Benchmark by benchmark

First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.

Boards won, where both have a result
Categorygpt-oss-120bBarsHy3Ties
Coding04
Reasoning05
Math02
Knowledge04
Web design06
General018
All shared boards039
CodingLike-for-likeFour of these boards feed the Vibe Coding Index04
Coding benchmarks for gpt-oss-120b and Hy3
Benchmarkgpt-oss-120bHy3Leader
Aider polyglot41.8%Not measuredOnly gpt-oss-120b measured
SWE-bench Verified26.0%Not measuredOnly gpt-oss-120b measured
LMArena WebDevNot measured1507Only Hy3 measured
AA Coding Index30.4Not measuredOnly gpt-oss-120b measured
LiveCodeBench (Vals AI)83.2%Not measuredOnly gpt-oss-120b measured
SWE-bench Verified (Vals AI)33.6%Not measuredOnly gpt-oss-120b measured
LiveCodeBench (Artificial Analysis run)87.8%Not measuredOnly gpt-oss-120b measured
SciCode34.0%48.6%Hy3
Terminal-Bench Hard (Artificial Analysis run)23.5%Not measuredOnly gpt-oss-120b measured
Terminal-Bench18.7%Not measuredOnly gpt-oss-120b measured
WeirdML48.2%Not measuredOnly gpt-oss-120b measured
ALE-Bench575.6838.6Hy3
LMArena Text: coding13791466Hy3
LMArena Text: software and IT13871463Hy3
LMArena WebDev: ReactNot measured1511Only Hy3 measured
LMArena WebDev: HTMLNot measured1487Only Hy3 measured
Neither model has a result on the other 22 boards here
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index2 boards, none shared
Intelligence benchmarks for gpt-oss-120b and Hy3
Benchmarkgpt-oss-120bHy3Leader
AA Intelligence Index11.6Not measuredOnly gpt-oss-120b measured
Epoch Capabilities Index139.8Not measuredOnly gpt-oss-120b measured
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index5 boards, none shared
Agentic work benchmarks for gpt-oss-120b and Hy3
Benchmarkgpt-oss-120bHy3Leader
AA Agentic Index3.7Not measuredOnly gpt-oss-120b measured
τ²-Bench Telecom65.8%Not measuredOnly gpt-oss-120b measured
APEX-Agents4.4%Not measuredOnly gpt-oss-120b measured
METR time horizons56.6%Not measuredOnly gpt-oss-120b measured
Vending-Bench 2-$22Not measuredOnly gpt-oss-120b measured
Neither model has a result on the other 34 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index05
Reasoning benchmarks for gpt-oss-120b and Hy3
Benchmarkgpt-oss-120bHy3Leader
GPQA Diamond78.5%Not measuredOnly gpt-oss-120b measured
GPQA Diamond (Artificial Analysis run)78.2%89.7%Hy3
Humanity's Last Exam (Artificial Analysis run)19.6%33.5%Hy3
GPQA Diamond (Epoch AI run)75.8%Not measuredOnly gpt-oss-120b measured
SimpleBench22.1%Not measuredOnly gpt-oss-120b measured
Mystery game puzzles2.0%Not measuredOnly gpt-oss-120b measured
LMArena Text: hard prompts13641447Hy3
LMArena Text: expert13561461Hy3
LMArena Text: hard prompts in English13681455Hy3
Neither model has a result on the other 12 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index02
Math benchmarks for gpt-oss-120b and Hy3
Benchmarkgpt-oss-120bHy3Leader
AIME92.6%Not measuredOnly gpt-oss-120b measured
MATH 500 (Vals AI)94.8%Not measuredOnly gpt-oss-120b measured
MGSM (Vals AI)92.0%Not measuredOnly gpt-oss-120b measured
AA Math Index93.4Not measuredOnly gpt-oss-120b measured
AIME 2025 (Artificial Analysis run)93.4%Not measuredOnly gpt-oss-120b measured
OTIS Mock AIME88.9%Not measuredOnly gpt-oss-120b measured
LMArena Text: math13891473Hy3
LMArena Text: mathematical work13861482Hy3
Neither model has a result on the other 5 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index04
Knowledge benchmarks for gpt-oss-120b and Hy3
Benchmarkgpt-oss-120bHy3Leader
MMLU Pro79.2%Not measuredOnly gpt-oss-120b measured
LegalBench (Vals AI)75.9%Not measuredOnly gpt-oss-120b measured
CaseLaw (Vals AI)48.8%Not measuredOnly gpt-oss-120b measured
CorpFin (Vals AI)58.2%Not measuredOnly gpt-oss-120b measured
TaxEval (Vals AI)71.6%Not measuredOnly gpt-oss-120b measured
MedQA (Vals AI)91.4%Not measuredOnly gpt-oss-120b measured
MMLU Pro (Artificial Analysis run)80.8%Not measuredOnly gpt-oss-120b measured
LMArena Text: science13821457Hy3
LMArena Text: medicine and healthcare13881452Hy3
LMArena Text: legal and government13551422Hy3
LMArena Text: business and finance13591424Hy3
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index06
Web design benchmarks for gpt-oss-120b and Hy3
Benchmarkgpt-oss-120bHy3Leader
Design Arena: websites9681230Hy3
Design Arena: UI components9271205Hy3
Design Arena: game dev9921208Hy3
Design Arena: data viz9871163Hy3
Design Arena: 3D9011233Hy3
Design Arena: all code categories9631227Hy3
Design Arena: SVGNot measured1199Only Hy3 measured
Design Arena: ASCII artNot measured1157Only Hy3 measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index018
General benchmarks for gpt-oss-120b and Hy3
Benchmarkgpt-oss-120bHy3Leader
IFBench69.0%Not measuredOnly gpt-oss-120b measured
Long context reasoning (AA-LCR)52.0%79.0%Hy3
DTBench76.3%Not measuredOnly gpt-oss-120b measured
LMCA22.1%Not measuredOnly gpt-oss-120b measured
Fiction.LiveBench44.4%Not measuredOnly gpt-oss-120b measured
Creative writing (Lech Mazur)77.1%Not measuredOnly gpt-oss-120b measured
Surface Evolver Bench25.0%Not measuredOnly gpt-oss-120b measured
LMArena Text13661438Hy3
LMArena Text: instruction following13181426Hy3
LMArena Text: creative writing12741403Hy3
LMArena Text: English13751448Hy3
LMArena Text: non-English13511426Hy3
LMArena Text: Chinese13851485Hy3
LMArena Text: German13531449Hy3
LMArena Text: Japanese13311397Hy3
LMArena Text: Korean12821396Hy3
LMArena Text: French13701456Hy3
LMArena Text: Spanish13891457Hy3
LMArena Text: Russian13431432Hy3
LMArena Text: Polish13531447Hy3
LMArena Text: multi-turn13401436Hy3
LMArena Text: longer queries13191442Hy3
LMArena Text: writing and language13061414Hy3
LMArena Text: entertainment and media12921400Hy3
Neither model has a result on the other 22 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for gpt-oss-120b and Hy3
Benchmarkgpt-oss-120bHy3Leader
Neither model has a result on 5 boards here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

gpt-oss-120b$0.0004Fits in one request
Hy3$0.0004Fits in one request

Hy3 costs less

Repository review

50K input + 3K output tokens

gpt-oss-120b$0.0093Fits in one request
Hy3$0.0082Fits in one request

Hy3 costs less

Agent loop

200K input + 10K output tokens

gpt-oss-120b$0.036Exceeds the context window
Hy3$0.032Fits in one request

Hy3 costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of gpt-oss-120b and Hy3
SpecificationOpenAI gpt-oss-120bTencent Hy3
MakerOpenAITencent
WeightsOpen weightsOpen weights
ReleasedAugust 5, 2025July 6, 2026
Context window131K262K
Input $/Mtok$0.15$0.132
Output $/Mtok$0.60$0.528
Coding index34.543.9
Independent measurements behind it21
Cost per solved task$0.51Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is gpt-oss-120b better than Hy3 for coding?

Pick Hy3 for coding: it scores 43.9 on the Vibe Coding Index against 34.5 for gpt-oss-120b, though on 1 benchmark against 2. gpt-oss-120b is neither cheaper nor larger in context, and leads no benchmark both models were measured on.

Which is cheaper, gpt-oss-120b or Hy3?

gpt-oss-120b costs $0.15 per million input tokens and $0.60 per million output tokens; Hy3 costs $0.132 and $0.528. Cost per solved task is known for gpt-oss-120b only.

Which has the bigger context window, gpt-oss-120b or Hy3?

Hy3, with 262K tokens against 131K.

How many benchmarks is the gpt-oss-120b vs Hy3 comparison based on?

39 benchmarks have a result for both models as of October 21, 2026. gpt-oss-120b's coding index rests on 2 independent benchmarks and Hy3's on 1. Where only one model has a result, the page says so instead of naming a winner.

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