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GPT-4.1 Mini vs Kimi K3

Updated October 21, 2026. 59 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 Kimi K3
GPT-4.1 MiniOpenAI
Coding
28.5
Overall
10.2
Output $/M
$1.60
0
Kimi K3Moonshot AI
Coding
61.8
Overall
43.6
Output $/M
$11.936
59
vs boards won of 59 shared

Decision reading

Pick Kimi K3 for coding: it scores 61.8 on the Vibe Coding Index against 28.5 for GPT-4.1 Mini.

Pick GPT-4.1 Mini when output tokens cost 7.5x less.

Model AGPT-4.1 MiniOpenAI28.5/1002 independent benchmarks$1.818 per solved taskModel BKimi K3Moonshot AI61.8/1002 independent benchmarks$0.81 per solved task
Shared results
59
GPT-4.1 Mini only
25
Kimi K3 only
58
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, Kimi K3 61.8 from 2 benchmarks.
Widest category
Web design, 46.8 points apart on average over 6 shared benchmarks.
Widest single gap
ARC-AGI: GPT-4.1 Mini 3.5% against Kimi K3 94.5%, 91.0 points apart on a 0 to 100 scale.
Output price
GPT-4.1 Mini $1.60 against Kimi K3 $11.936 per million output tokens, 7.5x apart.
Context window
GPT-4.1 Mini takes 1.05M tokens, Kimi K3 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 MiniBarsKimi K3Ties
Coding05
Intelligence02
Reasoning012
Math04
Knowledge010
Web design06
General020
All shared boards059
CodingLike-for-likeFour of these boards feed the Vibe Coding Index05
Coding benchmarks for GPT-4.1 Mini and Kimi K3
BenchmarkGPT-4.1 MiniKimi K3Leader
Aider polyglot32.4%Not measuredOnly GPT-4.1 Mini measured
SWE-bench Verified23.9%Not measuredOnly GPT-4.1 Mini measured
LiveBench codingNot measured59.3%Only Kimi K3 measured
LMArena WebDevNot measured1655Only Kimi K3 measured
AA Coding Index20.276.2Kimi K3
LiveCodeBench (Vals AI)58.2%87.2%Kimi K3
SWE-bench Verified (Vals AI)Not measured93.4%Only Kimi K3 measured
Terminal-Bench 4 (Vals AI)Not measured17.2%Only Kimi K3 measured
Vibe Code Bench (Vals AI)Not measured85.0%Only Kimi K3 measured
Code migration (Vals AI)Not measured16.1%Only Kimi K3 measured
ProgramBench (Vals AI)Not measured2.0%Only Kimi K3 measured
IOI (Vals AI)Not measured48.9%Only Kimi K3 measured
Terminal-Bench 2.1 (Vals AI)Not measured80.9%Only Kimi K3 measured
SWE-bench Multimodal (Vals AI)Not measured44.2%Only Kimi K3 measured
Vibe Code Bench 1-100 (Vals AI)Not measured18.2%Only Kimi K3 measured
CyberBench (Vals AI)Not measured75.2%Only Kimi K3 measured
LiveCodeBench (Artificial Analysis run)48.3%Not measuredOnly GPT-4.1 Mini measured
SciCodeNot measured59.5%Only Kimi K3 measured
Terminal-Bench Hard (Artificial Analysis run)7.6%Not measuredOnly GPT-4.1 Mini measured
FrontierCodeNot measured44.2%Only Kimi K3 measured
FrontierSWENot measured25.9%Only Kimi K3 measured
WeirdML37.6%82.6%Kimi K3
ALE-BenchNot measured1524.5Only Kimi K3 measured
LMArena Text: coding13671508Kimi K3
LMArena Text: software and IT13601499Kimi K3
LMArena WebDev: ReactNot measured1670Only Kimi K3 measured
LMArena WebDev: HTMLNot measured1644Only Kimi K3 measured
LMArena WebDev: from an imageNot measured1579Only Kimi K3 measured
Neither model has a result on the other 10 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for GPT-4.1 Mini and Kimi K3
BenchmarkGPT-4.1 MiniKimi K3Leader
AA Intelligence Index10.243.6Kimi K3
Epoch Capabilities Index134.9157.9Kimi K3
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index25 boards, none shared
Agentic work benchmarks for GPT-4.1 Mini and Kimi K3
BenchmarkGPT-4.1 MiniKimi K3Leader
AA Agentic IndexNot measured50.0Only Kimi K3 measured
Design Arena: agents building web appsNot measured1296Only Kimi K3 measured
Design Arena: agents building full-stack appsNot measured1315Only Kimi K3 measured
Design Arena: agents building mobile appsNot measured1267Only Kimi K3 measured
Design Arena: agents building Android appsNot measured1256Only Kimi K3 measured
Design Arena: agents building Godot gamesNot measured1223Only Kimi K3 measured
Design Arena: agents building gamesNot measured1252Only Kimi K3 measured
Design Arena: HTML slidesNot measured1256Only Kimi K3 measured
Design Arena: PowerPoint slidesNot measured1273Only Kimi K3 measured
Design Arena: spreadsheetsNot measured1058Only Kimi K3 measured
LiveBench researchNot measured79.0%Only Kimi K3 measured
LiveBench browserNot measured16.0%Only Kimi K3 measured
LiveBench long agenticNot measured42.8%Only Kimi K3 measured
Finance Agent (Vals AI)Not measured53.1%Only Kimi K3 measured
Tax Agent Bench (Vals AI)Not measured33.4%Only Kimi K3 measured
Legal Research Bench (Vals AI)Not measured46.1%Only Kimi K3 measured
Harvey's Legal Agent Benchmark (Vals AI)Not measured12.9%Only Kimi K3 measured
Excel Modeling Benchmark (Vals AI)Not measured66.7%Only Kimi K3 measured
BioMysteryBench (Vals AI)Not measured72.6%Only Kimi K3 measured
Terminal-Bench-Science (Vals AI)Not measured1.4%Only Kimi K3 measured
Time Horizon Index (Vals AI)Not measured10.5%Only Kimi K3 measured
τ²-Bench Telecom52.9%Not measuredOnly GPT-4.1 Mini measured
APEX-AgentsNot measured47.8%Only Kimi K3 measured
PostTrainBenchNot measured32.0%Only Kimi K3 measured
Vending-Bench 2Not measured$5,165Only Kimi K3 measured
Neither model has a result on the other 14 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index012
Reasoning benchmarks for GPT-4.1 Mini and Kimi K3
BenchmarkGPT-4.1 MiniKimi K3Leader
GPQA Diamond67.9%92.9%Kimi K3
LiveBench reasoningNot measured90.7%Only Kimi K3 measured
MMMU Pro (Vals AI)70.5%88.2%Kimi K3
GPQA Diamond (Artificial Analysis run)66.4%93.5%Kimi K3
Humanity's Last Exam (Artificial Analysis run)5.0%46.9%Kimi K3
GPQA Diamond (Epoch AI run)65.8%93.1%Kimi K3
ARC-AGI3.5%94.5%Kimi K3
ARC-AGI-20.0%60.4%Kimi K3
SimpleBenchNot measured60.7%Only Kimi K3 measured
Chess puzzles1.0%37.0%Kimi K3
Mystery game puzzles7.0%26.0%Kimi K3
LMArena Text: hard prompts13491495Kimi K3
LMArena Text: expert13381520Kimi K3
LMArena Text: hard prompts in English13621496Kimi K3
LMArena Vision: diagrams1182Not measuredOnly GPT-4.1 Mini measured
LMArena Vision: homework1214Not measuredOnly GPT-4.1 Mini measured
Neither model has a result on the other 5 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index04
Math benchmarks for GPT-4.1 Mini and Kimi K3
BenchmarkGPT-4.1 MiniKimi K3Leader
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%97.2%Kimi K3
FrontierMath, tiers 1 to 36.7%72.2%Kimi K3
FrontierMath, tier 4Not measured39.0%Only Kimi K3 measured
ProofBenchNot measured87.0%Only Kimi K3 measured
MATH level 587.3%Not measuredOnly GPT-4.1 Mini measured
LMArena Text: math13431494Kimi K3
LMArena Text: mathematical work13471505Kimi K3
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 Kimi K3
BenchmarkGPT-4.1 MiniKimi K3Leader
MMLU Pro77.2%88.0%Kimi K3
LegalBench (Vals AI)78.0%86.2%Kimi K3
CorpFin (Vals AI)57.9%71.6%Kimi K3
TaxEval (Vals AI)71.9%75.7%Kimi K3
MortgageTax (Vals AI)65.5%66.3%Kimi K3
MedQA (Vals AI)84.6%Not measuredOnly GPT-4.1 Mini measured
MedCode (Vals AI)Not measured49.4%Only Kimi K3 measured
MMLU Pro (Artificial Analysis run)78.1%Not measuredOnly GPT-4.1 Mini measured
SimpleQA Verified12.7%50.6%Kimi K3
LMArena Text: science13281508Kimi K3
LMArena Text: medicine and healthcare13241489Kimi K3
LMArena Text: legal and government13431503Kimi K3
LMArena Text: business and finance13221470Kimi K3
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 Kimi K3
BenchmarkGPT-4.1 MiniKimi K3Leader
Design Arena: websites9971336Kimi K3
Design Arena: UI components9611345Kimi K3
Design Arena: game dev10711361Kimi K3
Design Arena: data viz10341350Kimi K3
Design Arena: 3D8371388Kimi K3
Design Arena: all code categories9941361Kimi K3
Design Arena: SVGNot measured1301Only Kimi K3 measured
LiveBench designNot measured77.2%Only Kimi K3 measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index020
General benchmarks for GPT-4.1 Mini and Kimi K3
BenchmarkGPT-4.1 MiniKimi K3Leader
Vals IndexNot measured53.0%Only Kimi K3 measured
LiveBench data analysisNot measured78.7%Only Kimi K3 measured
Public Benefits Bench (Vals AI)Not measured68.2%Only Kimi K3 measured
SAGE (Vals AI)Not measured52.8%Only Kimi K3 measured
MedScribe (Vals AI)Not measured88.0%Only Kimi K3 measured
Vals Multimodal IndexNot measured73.4%Only Kimi K3 measured
IFBench38.3%Not measuredOnly GPT-4.1 Mini measured
Long context reasoning (AA-LCR)44.0%88.7%Kimi K3
DTBench68.8%91.2%Kimi K3
LMCA21.1%52.7%Kimi K3
Fiction.LiveBench44.4%Not measuredOnly GPT-4.1 Mini measured
Surface Evolver BenchNot measured95.0%Only Kimi K3 measured
Furniture assemblyNot measured34.2%Only Kimi K3 measured
LMArena Text13411476Kimi K3
LMArena Text: instruction following13331485Kimi K3
LMArena Text: creative writing12991457Kimi K3
LMArena Vision1181Not measuredOnly GPT-4.1 Mini measured
LMArena Text: English13561481Kimi K3
LMArena Text: non-English13181466Kimi K3
LMArena Text: Chinese13291529Kimi K3
LMArena Text: German13501490Kimi K3
LMArena Text: Japanese12901494Kimi K3
LMArena Text: Korean12981460Kimi K3
LMArena Text: French13581492Kimi K3
LMArena Text: Spanish13191472Kimi K3
LMArena Text: Russian13241485Kimi K3
LMArena Text: Polish13261458Kimi K3
LMArena Text: multi-turn13541489Kimi K3
LMArena Text: longer queries13441494Kimi K3
LMArena Text: writing and language13191471Kimi K3
LMArena Text: entertainment and media13001453Kimi K3
LMArena Vision: English1191Not measuredOnly GPT-4.1 Mini measured
LMArena Vision: Chinese1186Not measuredOnly GPT-4.1 Mini measured
LMArena Vision: reading text1188Not measuredOnly GPT-4.1 Mini measured
LMArena Vision: humor1182Not measuredOnly GPT-4.1 Mini measured
LMArena Vision: captioning1174Not measuredOnly GPT-4.1 Mini measured
LMArena Vision: recognizing things1187Not measuredOnly GPT-4.1 Mini measured
LMArena Vision: creative writing1182Not measuredOnly GPT-4.1 Mini 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 Kimi K3
BenchmarkGPT-4.1 MiniKimi K3Leader
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
Kimi K3$0.0062Fits in one request

GPT-4.1 Mini costs less

Repository review

50K input + 3K output tokens

GPT-4.1 Mini$0.025Fits in one request
Kimi K3$0.048Fits in one request

GPT-4.1 Mini costs less

Agent loop

200K input + 10K output tokens

GPT-4.1 Mini$0.096Fits in one request
Kimi K3$0.167Fits in one request

GPT-4.1 Mini 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 Kimi K3
SpecificationOpenAI GPT-4.1 MiniMoonshotAI Kimi K3
MakerOpenAIMoonshot AI
WeightsNo public weights listedOpen weights
ReleasedApril 14, 2025July 16, 2026
Context window1.05M1.05M
Input $/Mtok$0.40$0.239
Output $/Mtok$1.60$11.936
Coding index28.561.8
Independent measurements behind it22
Cost per solved task$1.818$0.81
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-4.1 Mini better than Kimi K3 for coding?

Pick Kimi K3 for coding: it scores 61.8 on the Vibe Coding Index against 28.5 for GPT-4.1 Mini. Pick GPT-4.1 Mini when output tokens cost 7.5x less.

Which is cheaper, GPT-4.1 Mini or Kimi K3?

GPT-4.1 Mini costs $0.40 per million input tokens and $1.60 per million output tokens; Kimi K3 costs $0.239 and $11.936. Per solved SWE-bench Verified task, GPT-4.1 Mini costs $1.818 and Kimi K3 $0.81.

Which has the bigger context window, GPT-4.1 Mini or Kimi K3?

Kimi K3, with 1.05M tokens against 1.05M.

How many benchmarks is the GPT-4.1 Mini vs Kimi K3 comparison based on?

59 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 Kimi K3's on 2. Where only one model has a result, the page says so instead of naming a winner.

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<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/gpt-4-1-mini-vs-kimi-k3">LLMBenchmark.ai, GPT-4.1 Mini vs Kimi K3</a></p>