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GPT-4.1 Mini vs GPT-5.6 Luna

Updated October 21, 2026. 66 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace GPT-4.1 Mini Replace GPT-5.6 Luna
GPT-4.1 MiniOpenAI
Coding
28.5
Overall
10.2
Output $/M
$1.60
0
GPT-5.6 LunaOpenAI
Coding
61.5
Overall
37.3
Output $/M
$1.20
66
vs boards won of 66 shared

Decision reading

Pick GPT-5.6 Luna for coding: it scores 61.5 on the Vibe Coding Index against 28.5 for GPT-4.1 Mini.

GPT-4.1 Mini is neither cheaper nor larger in context, and leads no benchmark both models were measured on.

Model AGPT-4.1 MiniOpenAI28.5/1002 independent benchmarks$1.818 per solved taskModel BGPT-5.6 LunaOpenAI61.5/1002 independent benchmarks$0.04 per solved task
Shared results
66
GPT-4.1 Mini only
18
GPT-5.6 Luna only
50
Like-for-like categories
7 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-4.1 Mini 28.5 from 2 benchmarks, GPT-5.6 Luna 61.5 from 2 benchmarks.
Widest category
Math, 42.2 points apart on average over 4 shared benchmarks.
Widest single gap
ARC-AGI: GPT-4.1 Mini 3.5% against GPT-5.6 Luna 88.0%, 84.5 points apart on a 0 to 100 scale.
Output price
GPT-4.1 Mini $1.60 against GPT-5.6 Luna $1.20 per million output tokens, 1.3x apart.
Context window
GPT-4.1 Mini takes 1.05M tokens, GPT-5.6 Luna 1.05M.

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-4.1 MiniBarsGPT-5.6 LunaTies
Coding04
Intelligence02
Reasoning014
Math04
Knowledge010
Web design06
General026
All shared boards066
CodingLike-for-likeFour of these boards feed the Vibe Coding Index04
Coding benchmarks for GPT-4.1 Mini and GPT-5.6 Luna
BenchmarkGPT-4.1 MiniGPT-5.6 LunaLeader
Aider polyglot32.4%Not measuredOnly GPT-4.1 Mini measured
SWE-bench Verified23.9%Not measuredOnly GPT-4.1 Mini measured
LiveBench codingNot measured73.6%Only GPT-5.6 Luna measured
LMArena WebDevNot measured1518Only GPT-5.6 Luna measured
AA Coding Index20.271.4GPT-5.6 Luna
LiveCodeBench (Vals AI)58.2%Not measuredOnly GPT-4.1 Mini measured
SWE-bench Verified (Vals AI)Not measured93.0%Only GPT-5.6 Luna measured
Terminal-Bench 4 (Vals AI)Not measured11.6%Only GPT-5.6 Luna measured
Vibe Code Bench (Vals AI)Not measured77.1%Only GPT-5.6 Luna measured
Code migration (Vals AI)Not measured44.5%Only GPT-5.6 Luna measured
ProgramBench (Vals AI)Not measured0.0%Only GPT-5.6 Luna measured
IOI (Vals AI)Not measured61.8%Only GPT-5.6 Luna measured
Terminal-Bench 2.1 (Vals AI)Not measured79.0%Only GPT-5.6 Luna measured
Vibe Code Bench 1-100 (Vals AI)Not measured22.6%Only GPT-5.6 Luna measured
SkillsBench (Vals AI)Not measured60.5%Only GPT-5.6 Luna measured
CyberBench (Vals AI)Not measured73.6%Only GPT-5.6 Luna measured
LiveCodeBench (Artificial Analysis run)48.3%Not measuredOnly GPT-4.1 Mini measured
SciCodeNot measured53.6%Only GPT-5.6 Luna measured
Terminal-Bench Hard (Artificial Analysis run)7.6%Not measuredOnly GPT-4.1 Mini measured
FrontierCodeNot measured39.8%Only GPT-5.6 Luna measured
WeirdML37.6%60.9%GPT-5.6 Luna
ALE-BenchNot measured1667.4Only GPT-5.6 Luna measured
LMArena Text: coding13671466GPT-5.6 Luna
LMArena Text: software and IT13601463GPT-5.6 Luna
LMArena WebDev: ReactNot measured1508Only GPT-5.6 Luna measured
LMArena WebDev: HTMLNot measured1520Only GPT-5.6 Luna measured
LMArena WebDev: from an imageNot measured1517Only GPT-5.6 Luna measured
Neither model has a result on the other 11 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for GPT-4.1 Mini and GPT-5.6 Luna
BenchmarkGPT-4.1 MiniGPT-5.6 LunaLeader
AA Intelligence Index10.237.3GPT-5.6 Luna
Epoch Capabilities Index134.9156.5GPT-5.6 Luna
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index16 boards, none shared
Agentic work benchmarks for GPT-4.1 Mini and GPT-5.6 Luna
BenchmarkGPT-4.1 MiniGPT-5.6 LunaLeader
AA Agentic IndexNot measured42.1Only GPT-5.6 Luna measured
LiveBench researchNot measured51.0%Only GPT-5.6 Luna measured
LiveBench browserNot measured68.0%Only GPT-5.6 Luna measured
LiveBench long agenticNot measured30.4%Only GPT-5.6 Luna measured
SREBench (Vals AI)Not measured1.5%Only GPT-5.6 Luna measured
Finance Agent (Vals AI)Not measured55.0%Only GPT-5.6 Luna measured
Tax Agent Bench (Vals AI)Not measured24.8%Only GPT-5.6 Luna measured
Legal Research Bench (Vals AI)Not measured36.5%Only GPT-5.6 Luna measured
Excel Modeling Benchmark (Vals AI)Not measured67.1%Only GPT-5.6 Luna measured
BioMysteryBench (Vals AI)Not measured61.5%Only GPT-5.6 Luna measured
Terminal-Bench-Science (Vals AI)Not measured0.0%Only GPT-5.6 Luna measured
Vals Science IndexNot measured25.3%Only GPT-5.6 Luna measured
τ²-Bench Telecom52.9%Not measuredOnly GPT-4.1 Mini measured
APEX-AgentsNot measured43.0%Only GPT-5.6 Luna measured
BALROGNot measured45.6%Only GPT-5.6 Luna measured
Vending-Bench 2Not measured$4,095Only GPT-5.6 Luna measured
Neither model has a result on the other 23 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index014
Reasoning benchmarks for GPT-4.1 Mini and GPT-5.6 Luna
BenchmarkGPT-4.1 MiniGPT-5.6 LunaLeader
GPQA Diamond67.9%91.7%GPT-5.6 Luna
LiveBench reasoningNot measured85.6%Only GPT-5.6 Luna measured
MysteryMechanism (Vals AI)Not measured14.4%Only GPT-5.6 Luna measured
MMMU Pro (Vals AI)70.5%85.0%GPT-5.6 Luna
GPQA Diamond (Artificial Analysis run)66.4%91.1%GPT-5.6 Luna
Humanity's Last Exam (Artificial Analysis run)5.0%39.5%GPT-5.6 Luna
GPQA Diamond (Epoch AI run)65.8%91.6%GPT-5.6 Luna
ARC-AGI3.5%88.0%GPT-5.6 Luna
ARC-AGI-20.0%59.5%GPT-5.6 Luna
SimpleBenchNot measured46.8%Only GPT-5.6 Luna measured
Chess puzzles1.0%43.0%GPT-5.6 Luna
Mystery game puzzles7.0%21.0%GPT-5.6 Luna
LMArena Text: hard prompts13491451GPT-5.6 Luna
LMArena Text: expert13381478GPT-5.6 Luna
LMArena Text: hard prompts in English13621460GPT-5.6 Luna
LMArena Vision: diagrams11821273GPT-5.6 Luna
LMArena Vision: homework12141282GPT-5.6 Luna
Neither model has a result on the other 4 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index04
Math benchmarks for GPT-4.1 Mini and GPT-5.6 Luna
BenchmarkGPT-4.1 MiniGPT-5.6 LunaLeader
AIME49.4%Not measuredOnly GPT-4.1 Mini measured
MATH 500 (Vals AI)88.0%Not measuredOnly GPT-4.1 Mini measured
MGSM (Vals AI)87.8%Not measuredOnly GPT-4.1 Mini measured
AA Math Index46.3Not measuredOnly GPT-4.1 Mini measured
AIME 2025 (Artificial Analysis run)46.3%Not measuredOnly GPT-4.1 Mini measured
OTIS Mock AIME44.7%98.3%GPT-5.6 Luna
FrontierMath, tiers 1 to 36.7%82.1%GPT-5.6 Luna
FrontierMath, tier 4Not measured61.0%Only GPT-5.6 Luna measured
ProofBenchNot measured60.0%Only GPT-5.6 Luna measured
MATH level 587.3%Not measuredOnly GPT-4.1 Mini measured
LMArena Text: math13431459GPT-5.6 Luna
LMArena Text: mathematical work13471470GPT-5.6 Luna
Neither model has a result on the other 1 board here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index010
Knowledge benchmarks for GPT-4.1 Mini and GPT-5.6 Luna
BenchmarkGPT-4.1 MiniGPT-5.6 LunaLeader
MMLU Pro77.2%86.0%GPT-5.6 Luna
LegalBench (Vals AI)78.0%84.0%GPT-5.6 Luna
CorpFin (Vals AI)57.9%64.2%GPT-5.6 Luna
TaxEval (Vals AI)71.9%76.2%GPT-5.6 Luna
MortgageTax (Vals AI)65.5%67.3%GPT-5.6 Luna
MedQA (Vals AI)84.6%Not measuredOnly GPT-4.1 Mini measured
MedCode (Vals AI)Not measured42.4%Only GPT-5.6 Luna measured
MMLU Pro (Artificial Analysis run)78.1%Not measuredOnly GPT-4.1 Mini measured
SimpleQA Verified12.7%41.0%GPT-5.6 Luna
LMArena Text: science13281433GPT-5.6 Luna
LMArena Text: medicine and healthcare13241399GPT-5.6 Luna
LMArena Text: legal and government13431446GPT-5.6 Luna
LMArena Text: business and finance13221439GPT-5.6 Luna
Neither model has a result on the other 4 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index06
Web design benchmarks for GPT-4.1 Mini and GPT-5.6 Luna
BenchmarkGPT-4.1 MiniGPT-5.6 LunaLeader
Design Arena: websites9971256GPT-5.6 Luna
Design Arena: UI components9611250GPT-5.6 Luna
Design Arena: game dev10711196GPT-5.6 Luna
Design Arena: data viz10341212GPT-5.6 Luna
Design Arena: 3D8371121GPT-5.6 Luna
Design Arena: all code categories9941231GPT-5.6 Luna
Design Arena: SVGNot measured1193Only GPT-5.6 Luna measured
Design Arena: ASCII artNot measured1144Only GPT-5.6 Luna measured
LiveBench designNot measured76.0%Only GPT-5.6 Luna measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index026
General benchmarks for GPT-4.1 Mini and GPT-5.6 Luna
BenchmarkGPT-4.1 MiniGPT-5.6 LunaLeader
LiveBench data analysisNot measured78.0%Only GPT-5.6 Luna measured
Public Benefits Bench (Vals AI)Not measured61.2%Only GPT-5.6 Luna measured
SAGE (Vals AI)Not measured44.2%Only GPT-5.6 Luna measured
MedScribe (Vals AI)Not measured84.4%Only GPT-5.6 Luna measured
Vals Multimodal IndexNot measured69.1%Only GPT-5.6 Luna measured
IFBench38.3%Not measuredOnly GPT-4.1 Mini measured
Long context reasoning (AA-LCR)44.0%83.7%GPT-5.6 Luna
DTBench68.8%89.1%GPT-5.6 Luna
LMCA21.1%48.5%GPT-5.6 Luna
Fiction.LiveBench44.4%Not measuredOnly GPT-4.1 Mini measured
Surface Evolver BenchNot measured61.9%Only GPT-5.6 Luna measured
Furniture assemblyNot measured42.5%Only GPT-5.6 Luna measured
LMArena Text13411431GPT-5.6 Luna
LMArena Text: instruction following13331437GPT-5.6 Luna
LMArena Text: creative writing12991396GPT-5.6 Luna
LMArena Vision11811257GPT-5.6 Luna
LMArena Text: English13561441GPT-5.6 Luna
LMArena Text: non-English13181417GPT-5.6 Luna
LMArena Text: Chinese13291470GPT-5.6 Luna
LMArena Text: German13501455GPT-5.6 Luna
LMArena Text: Japanese12901415GPT-5.6 Luna
LMArena Text: Korean12981415GPT-5.6 Luna
LMArena Text: French13581458GPT-5.6 Luna
LMArena Text: Spanish13191446GPT-5.6 Luna
LMArena Text: Russian13241427GPT-5.6 Luna
LMArena Text: Polish13261405GPT-5.6 Luna
LMArena Text: multi-turn13541434GPT-5.6 Luna
LMArena Text: longer queries13441436GPT-5.6 Luna
LMArena Text: writing and language13191419GPT-5.6 Luna
LMArena Text: entertainment and media13001402GPT-5.6 Luna
LMArena Vision: English11911263GPT-5.6 Luna
LMArena Vision: Chinese11861294GPT-5.6 Luna
LMArena Vision: reading text11881264GPT-5.6 Luna
LMArena Vision: humor11821190GPT-5.6 Luna
LMArena Vision: captioning1174Not measuredOnly GPT-4.1 Mini measured
LMArena Vision: recognizing things1187Not measuredOnly GPT-4.1 Mini measured
LMArena Vision: creative writing11821257GPT-5.6 Luna
LMArena DocumentNot measured1457Only GPT-5.6 Luna measured
Neither model has a result on the other 8 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for GPT-4.1 Mini and GPT-5.6 Luna
BenchmarkGPT-4.1 MiniGPT-5.6 LunaLeader
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-4.1 Mini$0.0012Fits in one request
GPT-5.6 Luna$0.0008Fits in one request

GPT-5.6 Luna costs less

Repository review

50K input + 3K output tokens

GPT-4.1 Mini$0.025Fits in one request
GPT-5.6 Luna$0.014Fits in one request

GPT-5.6 Luna costs less

Agent loop

200K input + 10K output tokens

GPT-4.1 Mini$0.096Fits in one request
GPT-5.6 Luna$0.052Fits 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-4.1 Mini and GPT-5.6 Luna
SpecificationOpenAI GPT-4.1 MiniOpenAI GPT-5.6 Luna
MakerOpenAIOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedApril 14, 2025July 9, 2026
Context window1.05M1.05M
Input $/Mtok$0.40$0.20
Output $/Mtok$1.60$1.20
Coding index28.561.5
Independent measurements behind it22
Cost per solved task$1.818$0.04
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-4.1 Mini better than GPT-5.6 Luna for coding?

Pick GPT-5.6 Luna for coding: it scores 61.5 on the Vibe Coding Index against 28.5 for GPT-4.1 Mini. GPT-4.1 Mini is neither cheaper nor larger in context, and leads no benchmark both models were measured on.

Which is cheaper, GPT-4.1 Mini or GPT-5.6 Luna?

GPT-4.1 Mini costs $0.40 per million input tokens and $1.60 per million output tokens; GPT-5.6 Luna costs $0.20 and $1.20. Per solved SWE-bench Verified task, GPT-4.1 Mini costs $1.818 and GPT-5.6 Luna $0.04.

Which has the bigger context window, GPT-4.1 Mini or GPT-5.6 Luna?

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

How many benchmarks is the GPT-4.1 Mini vs GPT-5.6 Luna comparison based on?

66 benchmarks have a result for both models as of October 21, 2026. GPT-4.1 Mini's coding index rests on 2 independent benchmarks and GPT-5.6 Luna's on 2. Where only one model has a result, the page says so instead of naming a winner.

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