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GPT-5.6 Luna vs Qwen3.6 Plus

GPT-5.6 Luna leads Qwen3.6 Plus on coding, 58.0 to 44.1 on the Vibe Coding Index, and GPT-5.6 Luna costs 1.6x less per output token ($1.20 vs $1.95 per million). Updated October 23, 2026; 76 benchmarks have a result for both.

Replace GPT-5.6 Luna Replace Qwen3.6 Plus
GPT-5.6 LunaOpenAI
Coding
58.0
Overall
61.6
Output $/M
$1.20
52
Qwen3.6 PlusQwen
Coding
44.1
Overall
56.2
Output $/M
$1.95
23
vs boards won of 76 shared, 1 tied

GPT-5.6 Luna or Qwen3.6 Plus: which to pick

Pick GPT-5.6 Luna for coding: it scores 58.0 on the Vibe Coding Index against 44.1 for Qwen3.6 Plus.

Pick Qwen3.6 Plus for work measured by LMArena Text: coding or Vending-Bench 2, where it leads.

Model AGPT-5.6 LunaOpenAI58.0/1006 independent benchmarks$0.04 per solved taskModel BQwen3.6 PlusQwen44.1/1003 independent benchmarks$1.19 per solved task
Shared results
76
GPT-5.6 Luna only
44
Qwen3.6 Plus only
7
Like-for-like categories
8 of 9

Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.

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-5.6 Luna 58.0 from 6 benchmarks, Qwen3.6 Plus 44.1 from 3 benchmarks.
Widest category
Agentic work, 18.7 points apart on average over 5 shared benchmarks.
Widest single gap
Vibe Code Bench (Vals AI): GPT-5.6 Luna 77.1% against Qwen3.6 Plus 25.6%, 51.5 points apart on a 0 to 100 scale.
Output price
GPT-5.6 Luna $1.20 against Qwen3.6 Plus $1.95 per million output tokens, 1.6x apart.
Context window
GPT-5.6 Luna takes 1.05M tokens, Qwen3.6 Plus 1M.

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-5.6 LunaBarsQwen3.6 PlusTies
Coding1111 tie
Intelligence20
Agentic work41
Reasoning100
Math40
Knowledge56
Web design44
General1211
All shared boards52231 tie
CodingLike-for-likeSix of these boards feed the Vibe Coding Index111
Coding benchmarks for GPT-5.6 Luna and Qwen3.6 Plus
BenchmarkGPT-5.6 LunaQwen3.6 PlusLeader
LiveBench coding73.6%Not measuredOnly GPT-5.6 Luna measured
LMArena WebDev15191462GPT-5.6 Luna
AA Coding Index71.454.5GPT-5.6 Luna
LiveCodeBench (Vals AI)Not measured86.0%Only Qwen3.6 Plus measured
SWE-bench Verified (Vals AI)93.0%73.4%GPT-5.6 Luna
Terminal-Bench 4 (Vals AI)11.6%Not measuredOnly GPT-5.6 Luna measured
Vibe Code Bench (Vals AI)77.1%25.6%GPT-5.6 Luna
Code migration (Vals AI)44.5%11.1%GPT-5.6 Luna
ProgramBench (Vals AI)0.0%0.0%Tie
IOI (Vals AI)61.8%Not measuredOnly GPT-5.6 Luna measured
Terminal-Bench 2.1 (Vals AI)79.0%53.2%GPT-5.6 Luna
Vibe Code Bench 1-100 (Vals AI)22.6%Not measuredOnly GPT-5.6 Luna measured
SkillsBench (Vals AI)60.5%Not measuredOnly GPT-5.6 Luna measured
CyberBench (Vals AI)73.6%Not measuredOnly GPT-5.6 Luna measured
SciCode53.6%Not measuredOnly GPT-5.6 Luna measured
Terminal-Bench Hard (Artificial Analysis run)Not measured43.9%Only Qwen3.6 Plus measured
FrontierCode39.8%Not measuredOnly GPT-5.6 Luna measured
WeirdML60.9%Not measuredOnly GPT-5.6 Luna measured
ALE-Bench1667.4670.1GPT-5.6 Luna
LMArena Text: coding14671467Qwen3.6 Plus
LMArena Text: software and IT14641462GPT-5.6 Luna
LMArena WebDev: React15081454GPT-5.6 Luna
LMArena WebDev: HTML15201462GPT-5.6 Luna
LMArena WebDev: from an image15171472GPT-5.6 Luna
SciCode6.2%Not measuredOnly GPT-5.6 Luna measured
Neither model has a result on the other 18 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for GPT-5.6 Luna and Qwen3.6 Plus
BenchmarkGPT-5.6 LunaQwen3.6 PlusLeader
AA Intelligence Index37.327.0GPT-5.6 Luna
Epoch Capabilities Index156.5147.3GPT-5.6 Luna
Agentic workLike-for-likePublic boards, shown as published, kept out of the index41
Agentic work benchmarks for GPT-5.6 Luna and Qwen3.6 Plus
BenchmarkGPT-5.6 LunaQwen3.6 PlusLeader
AA Agentic Index42.1Not measuredOnly GPT-5.6 Luna measured
LiveBench research51.0%Not measuredOnly GPT-5.6 Luna measured
LiveBench browser68.0%Not measuredOnly GPT-5.6 Luna measured
LiveBench long agentic30.4%Not measuredOnly GPT-5.6 Luna measured
SREBench (Vals AI)1.5%Not measuredOnly GPT-5.6 Luna measured
Finance Agent (Vals AI)55.0%40.9%GPT-5.6 Luna
Tax Agent Bench (Vals AI)24.8%7.7%GPT-5.6 Luna
Legal Research Bench (Vals AI)36.5%14.9%GPT-5.6 Luna
Excel Modeling Benchmark (Vals AI)67.1%32.9%GPT-5.6 Luna
BioMysteryBench (Vals AI)61.5%Not measuredOnly GPT-5.6 Luna measured
Terminal-Bench-Science (Vals AI)0.0%Not measuredOnly GPT-5.6 Luna measured
Vals Science Index25.3%Not measuredOnly GPT-5.6 Luna measured
τ²-Bench TelecomNot measured97.7%Only Qwen3.6 Plus measured
APEX-Agents43.0%Not measuredOnly GPT-5.6 Luna measured
BALROG45.6%Not measuredOnly GPT-5.6 Luna measured
Vending-Bench 2$4,095$5,115Qwen3.6 Plus
Neither model has a result on the other 26 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index100
Reasoning benchmarks for GPT-5.6 Luna and Qwen3.6 Plus
BenchmarkGPT-5.6 LunaQwen3.6 PlusLeader
GPQA Diamond91.7%87.4%GPT-5.6 Luna
LiveBench reasoning85.6%Not measuredOnly GPT-5.6 Luna measured
MysteryMechanism (Vals AI)14.4%Not measuredOnly GPT-5.6 Luna measured
MMMU Pro (Vals AI)85.0%84.2%GPT-5.6 Luna
GPQA Diamond (Artificial Analysis run)91.1%88.2%GPT-5.6 Luna
Humanity's Last Exam (Artificial Analysis run)39.5%27.8%GPT-5.6 Luna
GPQA Diamond (Epoch AI run)91.6%88.4%GPT-5.6 Luna
ARC-AGI88.0%Not measuredOnly GPT-5.6 Luna measured
ARC-AGI-259.5%Not measuredOnly GPT-5.6 Luna measured
SimpleBench46.8%Not measuredOnly GPT-5.6 Luna measured
Chess puzzles43.0%14.0%GPT-5.6 Luna
Mystery game puzzles21.0%12.0%GPT-5.6 Luna
LMArena Text: hard prompts14521448GPT-5.6 Luna
LMArena Text: expert14781454GPT-5.6 Luna
LMArena Text: hard prompts in English14601455GPT-5.6 Luna
LMArena Vision: diagrams1273Not measuredOnly GPT-5.6 Luna measured
LMArena Vision: homework1282Not measuredOnly GPT-5.6 Luna measured
Kagi LLM Benchmark49.1%Not measuredOnly GPT-5.6 Luna measured
Neither model has a result on the other 5 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index40
Math benchmarks for GPT-5.6 Luna and Qwen3.6 Plus
BenchmarkGPT-5.6 LunaQwen3.6 PlusLeader
AIMENot measured94.6%Only Qwen3.6 Plus measured
OTIS Mock AIME98.3%93.3%GPT-5.6 Luna
FrontierMath, tiers 1 to 382.1%38.2%GPT-5.6 Luna
FrontierMath, tier 461.0%Not measuredOnly GPT-5.6 Luna measured
ProofBench60.0%Not measuredOnly GPT-5.6 Luna measured
LMArena Text: math14591450GPT-5.6 Luna
LMArena Text: mathematical work14701448GPT-5.6 Luna
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index56
Knowledge benchmarks for GPT-5.6 Luna and Qwen3.6 Plus
BenchmarkGPT-5.6 LunaQwen3.6 PlusLeader
MMLU Pro86.0%87.7%Qwen3.6 Plus
LegalBench (Vals AI)84.0%84.2%Qwen3.6 Plus
CaseLaw (Vals AI)Not measured51.5%Only Qwen3.6 Plus measured
CorpFin (Vals AI)64.2%61.9%GPT-5.6 Luna
TaxEval (Vals AI)76.2%74.7%GPT-5.6 Luna
MortgageTax (Vals AI)67.3%68.0%Qwen3.6 Plus
MedCode (Vals AI)42.4%36.9%GPT-5.6 Luna
SimpleQA Verified41.0%44.1%Qwen3.6 Plus
LMArena Text: science14331439Qwen3.6 Plus
LMArena Text: medicine and healthcare13981442Qwen3.6 Plus
LMArena Text: legal and government14461437GPT-5.6 Luna
LMArena Text: business and finance14391430GPT-5.6 Luna
FACTS Benchmark Suite35.0%Not measuredOnly GPT-5.6 Luna measured
Neither model has a result on the other 7 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index44
Web design benchmarks for GPT-5.6 Luna and Qwen3.6 Plus
BenchmarkGPT-5.6 LunaQwen3.6 PlusLeader
Design Arena: websites12551243GPT-5.6 Luna
Design Arena: UI components12481230GPT-5.6 Luna
Design Arena: game dev11941210Qwen3.6 Plus
Design Arena: data viz12121229Qwen3.6 Plus
Design Arena: 3D11221203Qwen3.6 Plus
Design Arena: all code categories12301235Qwen3.6 Plus
Design Arena: SVG11931161GPT-5.6 Luna
Design Arena: ASCII art11421113GPT-5.6 Luna
LiveBench design76.0%Not measuredOnly GPT-5.6 Luna measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index1211
General benchmarks for GPT-5.6 Luna and Qwen3.6 Plus
BenchmarkGPT-5.6 LunaQwen3.6 PlusLeader
LiveBench data analysis78.0%Not measuredOnly GPT-5.6 Luna measured
Public Benefits Bench (Vals AI)61.2%Not measuredOnly GPT-5.6 Luna measured
SAGE (Vals AI)44.2%44.9%Qwen3.6 Plus
MedScribe (Vals AI)84.4%77.0%GPT-5.6 Luna
Vals Multimodal Index69.1%51.5%GPT-5.6 Luna
IFBenchNot measured75.2%Only Qwen3.6 Plus measured
Long context reasoning (AA-LCR)83.7%78.3%GPT-5.6 Luna
DTBench89.1%81.9%GPT-5.6 Luna
LMCA48.5%33.1%GPT-5.6 Luna
CL-benchNot measured20.3%Only Qwen3.6 Plus measured
Surface Evolver Bench61.9%Not measuredOnly GPT-5.6 Luna measured
Furniture assembly42.5%Not measuredOnly GPT-5.6 Luna measured
LMArena Text14311436Qwen3.6 Plus
LMArena Text: instruction following14381424GPT-5.6 Luna
LMArena Text: creative writing13961404Qwen3.6 Plus
LMArena Vision1257Not measuredOnly GPT-5.6 Luna measured
LMArena Text: English14411445Qwen3.6 Plus
LMArena Text: non-English14171424Qwen3.6 Plus
LMArena Text: Chinese14701477Qwen3.6 Plus
LMArena Text: German14551452GPT-5.6 Luna
LMArena Text: Japanese14161390GPT-5.6 Luna
LMArena Text: Korean14151379GPT-5.6 Luna
LMArena Text: French14571454GPT-5.6 Luna
LMArena Text: Spanish14451432GPT-5.6 Luna
LMArena Text: Russian14281434Qwen3.6 Plus
LMArena Text: Polish14041433Qwen3.6 Plus
LMArena Text: multi-turn14351438Qwen3.6 Plus
LMArena Text: longer queries14361439Qwen3.6 Plus
LMArena Text: writing and language14191418GPT-5.6 Luna
LMArena Text: entertainment and media14021402Qwen3.6 Plus
LMArena Vision: English1263Not measuredOnly GPT-5.6 Luna measured
LMArena Vision: Chinese1294Not measuredOnly GPT-5.6 Luna measured
LMArena Vision: reading text1264Not measuredOnly GPT-5.6 Luna measured
LMArena Vision: humor1190Not measuredOnly GPT-5.6 Luna measured
LMArena Vision: creative writing1257Not measuredOnly GPT-5.6 Luna measured
LMArena Document1457Not measuredOnly GPT-5.6 Luna measured
EQ-Bench 41156Not measuredOnly GPT-5.6 Luna measured
Neither model has a result on the other 11 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for GPT-5.6 Luna and Qwen3.6 Plus
BenchmarkGPT-5.6 LunaQwen3.6 PlusLeader
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-5.6 Luna$0.0008Fits in one request
Qwen3.6 Plus$0.0013Fits in one request

GPT-5.6 Luna costs less

Repository review

50K input + 3K output tokens

GPT-5.6 Luna$0.014Fits in one request
Qwen3.6 Plus$0.022Fits in one request

GPT-5.6 Luna costs less

Agent loop

200K input + 10K output tokens

GPT-5.6 Luna$0.052Fits in one request
Qwen3.6 Plus$0.085Fits in one request

GPT-5.6 Luna 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-5.6 Luna and Qwen3.6 Plus
SpecificationOpenAI GPT-5.6 LunaQwen3.6 Plus
MakerOpenAIQwen
WeightsNo public weights listedNo public weights listed
ReleasedJuly 9, 2026April 2, 2026
Context window1.05M1M
Input $/Mtok$0.20$0.325
Output $/Mtok$1.20$1.95
Coding index58.044.1
Independent measurements behind it63
Cost per solved task$0.04$1.19
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-5.6 Luna better than Qwen3.6 Plus for coding?

Pick GPT-5.6 Luna for coding: it scores 58.0 on the Vibe Coding Index against 44.1 for Qwen3.6 Plus. Pick Qwen3.6 Plus for work measured by LMArena Text: coding or Vending-Bench 2, where it leads.

Which is cheaper, GPT-5.6 Luna or Qwen3.6 Plus?

GPT-5.6 Luna costs $0.20 per million input tokens and $1.20 per million output tokens; Qwen3.6 Plus costs $0.325 and $1.95. Per solved SWE-bench Verified task, GPT-5.6 Luna costs $0.04 and Qwen3.6 Plus $1.19.

Which has the bigger context window, GPT-5.6 Luna or Qwen3.6 Plus?

GPT-5.6 Luna, with 1.05M tokens against 1M.

How many benchmarks is the GPT-5.6 Luna vs Qwen3.6 Plus comparison based on?

76 benchmarks have a result for both models as of October 23, 2026. GPT-5.6 Luna's coding index rests on 6 independent benchmarks and Qwen3.6 Plus's on 3. Where only one model has a result, the page says so instead of naming a winner.

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