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Mercury 2 vs Hy3

Updated October 21, 2026. 35 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Mercury 2 Replace Hy3
Mercury 2Inception
Coding
0.0
Overall
10.8
Output $/M
$0.75
0
Hy3Tencent
Coding
43.9
Overall
No data
Output $/M
$0.528
35
vs boards won of 35 shared

Decision reading

Pick Hy3 for coding: it scores 43.9 on the Vibe Coding Index against 0.0 for Mercury 2.

Mercury 2 is neither cheaper nor larger in context, and leads no benchmark both models were measured on.

Model AMercury 2Inception0.0/1001 independent benchmarkNo cost per solved taskModel BHy3Tencent43.9/1001 independent benchmarkNo cost per solved task
Shared results
35
Mercury 2 only
7
Hy3 only
9
Like-for-like categories
5 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
Mercury 2 0.0 from 1 benchmark, Hy3 43.9 from 1 benchmark.
Widest category
Coding, 26.9 points apart on average over 7 shared benchmarks.
Widest single gap
LMArena WebDev: React: Mercury 2 1160 against Hy3 1511, 58.5 points apart on a 0 to 100 scale.
Output price
Mercury 2 $0.75 against Hy3 $0.528 per million output tokens, 1.4x apart.
Context window
Mercury 2 takes 128K 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
CategoryMercury 2BarsHy3Ties
Coding07
Reasoning05
Knowledge03
Web design08
General012
All shared boards035
CodingLike-for-likeFour of these boards feed the Vibe Coding Index07
Coding benchmarks for Mercury 2 and Hy3
BenchmarkMercury 2Hy3Leader
LMArena WebDev11711507Hy3
AA Coding Index31.1Not measuredOnly Mercury 2 measured
SciCode37.7%48.6%Hy3
Terminal-Bench Hard (Artificial Analysis run)26.5%Not measuredOnly Mercury 2 measured
WeirdML43.2%Not measuredOnly Mercury 2 measured
ALE-Bench785.6838.6Hy3
LMArena Text: coding13901466Hy3
LMArena Text: software and IT13851463Hy3
LMArena WebDev: React11601511Hy3
LMArena WebDev: HTML11991487Hy3
Neither model has a result on the other 28 boards here
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board, none shared
Intelligence benchmarks for Mercury 2 and Hy3
BenchmarkMercury 2Hy3Leader
AA Intelligence Index10.8Not measuredOnly Mercury 2 measured
Neither model has a result on the other 1 board here
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index2 boards, none shared
Agentic work benchmarks for Mercury 2 and Hy3
BenchmarkMercury 2Hy3Leader
AA Agentic Index1.6Not measuredOnly Mercury 2 measured
τ²-Bench Telecom70.8%Not measuredOnly Mercury 2 measured
Neither model has a result on the other 37 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index05
Reasoning benchmarks for Mercury 2 and Hy3
BenchmarkMercury 2Hy3Leader
GPQA Diamond (Artificial Analysis run)77.0%89.7%Hy3
Humanity's Last Exam (Artificial Analysis run)17.1%33.5%Hy3
LMArena Text: hard prompts13621447Hy3
LMArena Text: expert13581461Hy3
LMArena Text: hard prompts in English13741455Hy3
Neither model has a result on the other 16 boards here
MathDirectional onlyPublic boards, shown as published, kept out of the index2 boards, none shared
Math benchmarks for Mercury 2 and Hy3
BenchmarkMercury 2Hy3Leader
LMArena Text: mathNot measured1473Only Hy3 measured
LMArena Text: mathematical workNot measured1482Only Hy3 measured
Neither model has a result on the other 11 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index03
Knowledge benchmarks for Mercury 2 and Hy3
BenchmarkMercury 2Hy3Leader
LMArena Text: science13431457Hy3
LMArena Text: medicine and healthcare13631452Hy3
LMArena Text: legal and governmentNot measured1422Only Hy3 measured
LMArena Text: business and finance13491424Hy3
Neither model has a result on the other 13 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index08
Web design benchmarks for Mercury 2 and Hy3
BenchmarkMercury 2Hy3Leader
Design Arena: websites10361230Hy3
Design Arena: UI components9981205Hy3
Design Arena: game dev9851208Hy3
Design Arena: data viz10091163Hy3
Design Arena: 3D9821233Hy3
Design Arena: all code categories10221227Hy3
Design Arena: SVG9981199Hy3
Design Arena: ASCII art9901157Hy3
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index012
General benchmarks for Mercury 2 and Hy3
BenchmarkMercury 2Hy3Leader
IFBench69.8%Not measuredOnly Mercury 2 measured
Long context reasoning (AA-LCR)43.7%79.0%Hy3
LMArena Text13541438Hy3
LMArena Text: instruction following13281426Hy3
LMArena Text: creative writing12861403Hy3
LMArena Text: English13781448Hy3
LMArena Text: non-English13301426Hy3
LMArena Text: Chinese14141485Hy3
LMArena Text: GermanNot measured1449Only Hy3 measured
LMArena Text: JapaneseNot measured1397Only Hy3 measured
LMArena Text: KoreanNot measured1396Only Hy3 measured
LMArena Text: FrenchNot measured1456Only Hy3 measured
LMArena Text: SpanishNot measured1457Only Hy3 measured
LMArena Text: Russian13041432Hy3
LMArena Text: PolishNot measured1447Only Hy3 measured
LMArena Text: multi-turn13571436Hy3
LMArena Text: longer queries13291442Hy3
LMArena Text: writing and language13001414Hy3
LMArena Text: entertainment and media13141400Hy3
Neither model has a result on the other 27 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Mercury 2 and Hy3
BenchmarkMercury 2Hy3Leader
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

Mercury 2$0.0006Fits in one request
Hy3$0.0004Fits in one request

Hy3 costs less

Repository review

50K input + 3K output tokens

Mercury 2$0.015Fits in one request
Hy3$0.0082Fits in one request

Hy3 costs less

Agent loop

200K input + 10K output tokens

Mercury 2$0.058Exceeds 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 Mercury 2 and Hy3
SpecificationInception Mercury 2Tencent Hy3
MakerInceptionTencent
WeightsNo public weights listedOpen weights
ReleasedMarch 4, 2026July 6, 2026
Context window128K262K
Input $/Mtok$0.25$0.132
Output $/Mtok$0.75$0.528
Coding index0.043.9
Independent measurements behind it11
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Mercury 2 better than Hy3 for coding?

Pick Hy3 for coding: it scores 43.9 on the Vibe Coding Index against 0.0 for Mercury 2. Mercury 2 is neither cheaper nor larger in context, and leads no benchmark both models were measured on.

Which is cheaper, Mercury 2 or Hy3?

Mercury 2 costs $0.25 per million input tokens and $0.75 per million output tokens; Hy3 costs $0.132 and $0.528. Cost per solved task is known for neither of them.

Which has the bigger context window, Mercury 2 or Hy3?

Hy3, with 262K tokens against 128K.

How many benchmarks is the Mercury 2 vs Hy3 comparison based on?

35 benchmarks have a result for both models as of October 21, 2026. Mercury 2's coding index rests on 1 independent benchmark 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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