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GPT-5.4 Mini vs Kimi K2.6

Kimi K2.6 leads GPT-5.4 Mini on coding, 52.1 to 35.8 on the Vibe Coding Index, at about the same output price ($4.00 vs $4.50 per million). Updated October 21, 2026; 81 benchmarks have a result for both.

Replace GPT-5.4 Mini Replace Kimi K2.6
GPT-5.4 MiniOpenAI
Coding
35.8
Overall
44.0
Output $/M
$4.50
11
Kimi K2.6Moonshot AI
Coding
52.1
Overall
60.5
Output $/M
$4.00
69
vs boards won of 81 shared, 1 tied

GPT-5.4 Mini or Kimi K2.6: which to pick

Pick Kimi K2.6 for coding: it scores 52.1 on the Vibe Coding Index against 35.8 for GPT-5.4 Mini, though on 3 benchmarks against 5.

Pick GPT-5.4 Mini for a larger context window (400K against 262K tokens) and work measured by Vibe Code Bench (Vals AI) or Terminal-Bench 2.1 (Vals AI), where it leads.

Model AGPT-5.4 MiniOpenAI35.8/1005 independent benchmarks$0.70 per solved taskModel BKimi K2.6Moonshot AI52.1/1003 independent benchmarks$0.35 per solved task
Shared results
81
GPT-5.4 Mini only
8
Kimi K2.6 only
28
Like-for-like categories
7 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-5.4 Mini 35.8 from 5 benchmarks, Kimi K2.6 52.1 from 3 benchmarks.
Widest category
Math, 8.7 points apart on average over 6 shared benchmarks.
Widest single gap
LMArena WebDev: React: GPT-5.4 Mini 1386 against Kimi K2.6 1505, 19.8 points apart on a 0 to 100 scale.
Output price
GPT-5.4 Mini $4.50 against Kimi K2.6 $4.00 per million output tokens, 1.1x apart.
Context window
GPT-5.4 Mini takes 400K tokens, Kimi K2.6 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-5.4 MiniBarsKimi K2.6Ties
Coding691 tie
Intelligence02
Agentic work15
Reasoning111
Math15
Knowledge010
General227
All shared boards11691 tie
CodingLike-for-likeSix of these boards feed the Vibe Coding Index69
Coding benchmarks for GPT-5.4 Mini and Kimi K2.6
BenchmarkGPT-5.4 MiniKimi K2.6Leader
LMArena WebDev13971509Kimi K2.6
AA Coding Index56.161.8Kimi K2.6
LiveCodeBench (Vals AI)81.5%86.8%Kimi K2.6
SWE-bench Verified (Vals AI)73.0%76.2%Kimi K2.6
Terminal-Bench 4 (Vals AI)2.5%Not measuredOnly GPT-5.4 Mini measured
Vibe Code Bench (Vals AI)48.0%37.9%GPT-5.4 Mini
Code migration (Vals AI)12.9%27.8%Kimi K2.6
ProgramBench (Vals AI)0.0%0.0%Tie
Terminal-Bench 2.1 (Vals AI)54.7%53.6%GPT-5.4 Mini
SciCode52.1%51.5%GPT-5.4 Mini
Terminal-Bench Hard (Artificial Analysis run)52.3%43.9%GPT-5.4 Mini
FrontierCode27.0%Not measuredOnly GPT-5.4 Mini measured
WeirdML60.3%55.9%GPT-5.4 Mini
ALE-Bench1188.61092.7GPT-5.4 Mini
LMArena Text: coding14381489Kimi K2.6
LMArena Text: software and IT14361484Kimi K2.6
LMArena WebDev: React13861505Kimi K2.6
LMArena WebDev: HTML14191485Kimi K2.6
LMArena WebDev: from an imageNot measured1521Only Kimi K2.6 measured
Neither model has a result on the other 20 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for GPT-5.4 Mini and Kimi K2.6
BenchmarkGPT-5.4 MiniKimi K2.6Leader
AA Intelligence Index24.127.0Kimi K2.6
Epoch Capabilities Index148.7150.9Kimi K2.6
Agentic workLike-for-likePublic boards, shown as published, kept out of the index15
Agentic work benchmarks for GPT-5.4 Mini and Kimi K2.6
BenchmarkGPT-5.4 MiniKimi K2.6Leader
AA Agentic Index17.920.5Kimi K2.6
Design Arena: agents building web appsNot measured1268Only Kimi K2.6 measured
Design Arena: agents building full-stack appsNot measured1155Only Kimi K2.6 measured
Design Arena: agents building mobile appsNot measured1157Only Kimi K2.6 measured
Design Arena: agents building Android appsNot measured1160Only Kimi K2.6 measured
Design Arena: agents building Godot gamesNot measured1120Only Kimi K2.6 measured
Design Arena: agents building gamesNot measured1141Only Kimi K2.6 measured
Design Arena: HTML slidesNot measured1184Only Kimi K2.6 measured
Design Arena: PowerPoint slidesNot measured1128Only Kimi K2.6 measured
Design Arena: spreadsheetsNot measured1276Only Kimi K2.6 measured
Finance Agent (Vals AI)45.4%44.9%GPT-5.4 Mini
Tax Agent Bench (Vals AI)8.8%12.4%Kimi K2.6
Legal Research Bench (Vals AI)12.5%15.9%Kimi K2.6
Excel Modeling Benchmark (Vals AI)45.4%57.9%Kimi K2.6
τ²-Bench Telecom83.3%95.9%Kimi K2.6
OSWorld 2.0Not measured4.6%Only Kimi K2.6 measured
DeepResearch Bench36.3%Not measuredOnly GPT-5.4 Mini measured
Vending-Bench 2Not measured$6,205Only Kimi K2.6 measured
Neither model has a result on the other 23 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index111
Reasoning benchmarks for GPT-5.4 Mini and Kimi K2.6
BenchmarkGPT-5.4 MiniKimi K2.6Leader
GPQA Diamond83.1%89.1%Kimi K2.6
MMMU Pro (Vals AI)79.3%86.3%Kimi K2.6
GPQA Diamond (Artificial Analysis run)87.5%91.1%Kimi K2.6
Humanity's Last Exam (Artificial Analysis run)28.1%37.5%Kimi K2.6
GPQA Diamond (Epoch AI run)86.9%90.8%Kimi K2.6
ARC-AGI63.7%Not measuredOnly GPT-5.4 Mini measured
ARC-AGI-218.9%Not measuredOnly GPT-5.4 Mini measured
Chess puzzles23.0%20.0%GPT-5.4 Mini
Mystery game puzzles11.0%18.0%Kimi K2.6
EBR-benchNot measured2.4%Only Kimi K2.6 measured
LMArena Text: hard prompts14241470Kimi K2.6
LMArena Text: expert14351491Kimi K2.6
LMArena Text: hard prompts in English14201471Kimi K2.6
LMArena Vision: diagrams12661298Kimi K2.6
LMArena Vision: homework12851310Kimi K2.6
Kagi LLM Benchmark37.9%Not measuredOnly GPT-5.4 Mini measured
Neither model has a result on the other 6 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index15
Math benchmarks for GPT-5.4 Mini and Kimi K2.6
BenchmarkGPT-5.4 MiniKimi K2.6Leader
AIME95.6%Not measuredOnly GPT-5.4 Mini measured
OTIS Mock AIME88.9%96.1%Kimi K2.6
FrontierMath, tiers 1 to 351.2%57.2%Kimi K2.6
FrontierMath, tier 49.8%25.6%Kimi K2.6
ProofBench21.0%16.0%GPT-5.4 Mini
LMArena Text: math14181474Kimi K2.6
LMArena Text: mathematical work14291480Kimi K2.6
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index010
Knowledge benchmarks for GPT-5.4 Mini and Kimi K2.6
BenchmarkGPT-5.4 MiniKimi K2.6Leader
MMLU Pro84.5%87.6%Kimi K2.6
LegalBench (Vals AI)Not measured84.7%Only Kimi K2.6 measured
CaseLaw (Vals AI)51.7%61.2%Kimi K2.6
CorpFin (Vals AI)60.9%66.7%Kimi K2.6
TaxEval (Vals AI)71.2%74.7%Kimi K2.6
MortgageTax (Vals AI)63.5%65.8%Kimi K2.6
MedCode (Vals AI)Not measured40.1%Only Kimi K2.6 measured
SimpleQA Verified29.4%34.9%Kimi K2.6
LMArena Text: science14171468Kimi K2.6
LMArena Text: medicine and healthcare13951457Kimi K2.6
LMArena Text: legal and government14141462Kimi K2.6
LMArena Text: business and finance14181445Kimi K2.6
Neither model has a result on the other 6 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Web design benchmarks for GPT-5.4 Mini and Kimi K2.6
BenchmarkGPT-5.4 MiniKimi K2.6Leader
Design Arena: websitesNot measured1269Only Kimi K2.6 measured
Design Arena: UI componentsNot measured1266Only Kimi K2.6 measured
Design Arena: game devNot measured1251Only Kimi K2.6 measured
Design Arena: data vizNot measured1249Only Kimi K2.6 measured
Design Arena: 3DNot measured1268Only Kimi K2.6 measured
Design Arena: all code categoriesNot measured1272Only Kimi K2.6 measured
Design Arena: SVGNot measured1181Only Kimi K2.6 measured
Design Arena: ASCII artNot measured1165Only Kimi K2.6 measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index227
General benchmarks for GPT-5.4 Mini and Kimi K2.6
BenchmarkGPT-5.4 MiniKimi K2.6Leader
Public Benefits Bench (Vals AI)Not measured56.6%Only Kimi K2.6 measured
SAGE (Vals AI)50.8%50.2%GPT-5.4 Mini
MedScribe (Vals AI)Not measured78.2%Only Kimi K2.6 measured
Vals Multimodal Index54.2%56.4%Kimi K2.6
IFBench73.3%76.0%Kimi K2.6
Long context reasoning (AA-LCR)77.0%81.0%Kimi K2.6
DTBench80.0%90.9%Kimi K2.6
LMCA40.8%37.3%GPT-5.4 Mini
Furniture assemblyNot measured21.7%Only Kimi K2.6 measured
ExploitBenchNot measured18.4%Only Kimi K2.6 measured
LMArena Text14121455Kimi K2.6
LMArena Text: instruction following14051451Kimi K2.6
LMArena Text: creative writing13701434Kimi K2.6
LMArena Vision12451282Kimi K2.6
LMArena Text: English14121460Kimi K2.6
LMArena Text: non-English14051446Kimi K2.6
LMArena Text: Chinese14461520Kimi K2.6
LMArena Text: German14081451Kimi K2.6
LMArena Text: Japanese13751443Kimi K2.6
LMArena Text: Korean13701427Kimi K2.6
LMArena Text: French14411471Kimi K2.6
LMArena Text: Spanish14051464Kimi K2.6
LMArena Text: Russian14171446Kimi K2.6
LMArena Text: Polish14151438Kimi K2.6
LMArena Text: multi-turn14291453Kimi K2.6
LMArena Text: longer queries14081468Kimi K2.6
LMArena Text: writing and language13931439Kimi K2.6
LMArena Text: entertainment and media13731428Kimi K2.6
LMArena Vision: English12441287Kimi K2.6
LMArena Vision: Chinese12861346Kimi K2.6
LMArena Vision: reading text12531291Kimi K2.6
LMArena Vision: humor12351280Kimi K2.6
LMArena Vision: recognizing things1218Not measuredOnly GPT-5.4 Mini measured
LMArena Vision: creative writing12221273Kimi K2.6
LMArena DocumentNot measured1451Only Kimi K2.6 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-5.4 Mini and Kimi K2.6
BenchmarkGPT-5.4 MiniKimi K2.6Leader
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-5.4 Mini$0.0030Fits in one request
Kimi K2.6$0.0029Fits in one request

Kimi K2.6 costs less

Repository review

50K input + 3K output tokens

GPT-5.4 Mini$0.051Fits in one request
Kimi K2.6$0.059Fits in one request

GPT-5.4 Mini costs less

Agent loop

200K input + 10K output tokens

GPT-5.4 Mini$0.195Fits in one request
Kimi K2.6$0.230Fits in one request

GPT-5.4 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-5.4 Mini and Kimi K2.6
SpecificationOpenAI GPT-5.4 MiniMoonshotAI Kimi K2.6
MakerOpenAIMoonshot AI
WeightsNo public weights listedOpen weights
ReleasedMarch 17, 2026April 20, 2026
Context window400K262K
Input $/Mtok$0.75$0.95
Output $/Mtok$4.50$4.00
Coding index35.852.1
Independent measurements behind it53
Cost per solved task$0.70$0.35
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-5.4 Mini better than Kimi K2.6 for coding?

Pick Kimi K2.6 for coding: it scores 52.1 on the Vibe Coding Index against 35.8 for GPT-5.4 Mini, though on 3 benchmarks against 5. Pick GPT-5.4 Mini for a larger context window (400K against 262K tokens) and work measured by Vibe Code Bench (Vals AI) or Terminal-Bench 2.1 (Vals AI), where it leads.

Which is cheaper, GPT-5.4 Mini or Kimi K2.6?

GPT-5.4 Mini costs $0.75 per million input tokens and $4.50 per million output tokens; Kimi K2.6 costs $0.95 and $4.00. Per solved SWE-bench Verified task, GPT-5.4 Mini costs $0.70 and Kimi K2.6 $0.35.

Which has the bigger context window, GPT-5.4 Mini or Kimi K2.6?

GPT-5.4 Mini, with 400K tokens against 262K.

How many benchmarks is the GPT-5.4 Mini vs Kimi K2.6 comparison based on?

81 benchmarks have a result for both models as of October 21, 2026. GPT-5.4 Mini's coding index rests on 5 independent benchmarks and Kimi K2.6's on 3. Where only one model has a result, the page says so instead of naming a winner.

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