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GPT-4.1 vs Kimi K2.6

Kimi K2.6 leads GPT-4.1 on the Artificial Analysis Intelligence Index, 27.0 to 12.7, and Kimi K2.6 costs 2.0x less per output token ($4.00 vs $8.00 per million). Updated October 21, 2026; 68 benchmarks have a result for both.

Replace GPT-4.1 Replace Kimi K2.6
GPT-4.1OpenAI
Coding
No data
Overall
36.5
Output $/M
$8.00
3
Kimi K2.6Moonshot AI
Coding
52.1
Overall
60.5
Output $/M
$4.00
65
vs boards won of 68 shared

GPT-4.1 or Kimi K2.6: which to pick

Only Kimi K2.6 has a coding score, 52.1 on the Vibe Coding Index; GPT-4.1 has none, so the two cannot be ranked on coding.

Pick GPT-4.1 for a larger context window (1.05M against 262K tokens) and work measured by CaseLaw (Vals AI) or TaxEval (Vals AI), where it leads.

Model AGPT-4.1OpenAINot benchmarkedNo coding benchmark$0.37 per solved taskModel BKimi K2.6Moonshot AI52.1/1003 independent benchmarks$0.35 per solved task
Shared results
68
GPT-4.1 only
24
Kimi K2.6 only
41
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-4.1 not benchmarked, Kimi K2.6 52.1 from 3 benchmarks.
Widest category
Agentic work, 48.8 points apart on average over 1 shared benchmark.
Widest single gap
OTIS Mock AIME: GPT-4.1 38.3% against Kimi K2.6 96.1%, 57.8 points apart on a 0 to 100 scale.
Output price
GPT-4.1 $8.00 against Kimi K2.6 $4.00 per million output tokens, 2.0x apart.
Context window
GPT-4.1 takes 1.05M 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-4.1BarsKimi K2.6Ties
Coding06
Intelligence02
Agentic work01
Reasoning011
Math04
Knowledge38
Web design06
General027
All shared boards365
CodingLike-for-likeSix of these boards feed the Vibe Coding Index06
Coding benchmarks for GPT-4.1 and Kimi K2.6
BenchmarkGPT-4.1Kimi K2.6Leader
Aider polyglot52.4%Not measuredOnly GPT-4.1 measured
SWE-bench Verified39.6%Not measuredOnly GPT-4.1 measured
SWE-bench Multimodal31.1%Not measuredOnly GPT-4.1 measured
LMArena WebDevNot measured1509Only Kimi K2.6 measured
AA Coding IndexNot measured61.8Only Kimi K2.6 measured
LiveCodeBench (Vals AI)54.7%86.8%Kimi K2.6
SWE-bench Verified (Vals AI)Not measured76.2%Only Kimi K2.6 measured
Vibe Code Bench (Vals AI)Not measured37.9%Only Kimi K2.6 measured
Code migration (Vals AI)Not measured27.8%Only Kimi K2.6 measured
ProgramBench (Vals AI)Not measured0.0%Only Kimi K2.6 measured
Terminal-Bench 2.1 (Vals AI)Not measured53.6%Only Kimi K2.6 measured
LiveCodeBench (Artificial Analysis run)45.7%Not measuredOnly GPT-4.1 measured
SciCodeNot measured51.5%Only Kimi K2.6 measured
Terminal-Bench Hard (Artificial Analysis run)13.6%43.9%Kimi K2.6
WeirdML39.0%55.9%Kimi K2.6
ALE-Bench558.11092.7Kimi K2.6
LMArena Text: coding13901489Kimi K2.6
LMArena Text: software and IT13911484Kimi K2.6
LMArena WebDev: ReactNot measured1505Only Kimi K2.6 measured
LMArena WebDev: HTMLNot measured1485Only Kimi K2.6 measured
LMArena WebDev: from an imageNot measured1521Only Kimi K2.6 measured
SciCode4.6%Not measuredOnly GPT-4.1 measured
Neither model has a result on the other 17 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for GPT-4.1 and Kimi K2.6
BenchmarkGPT-4.1Kimi K2.6Leader
AA Intelligence Index12.727.0Kimi K2.6
Epoch Capabilities Index136.7150.9Kimi K2.6
Agentic workLike-for-likePublic boards, shown as published, kept out of the index01
Agentic work benchmarks for GPT-4.1 and Kimi K2.6
BenchmarkGPT-4.1Kimi K2.6Leader
AA Agentic IndexNot measured20.5Only Kimi K2.6 measured
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)Not measured44.9%Only Kimi K2.6 measured
Tax Agent Bench (Vals AI)Not measured12.4%Only Kimi K2.6 measured
Legal Research Bench (Vals AI)Not measured15.9%Only Kimi K2.6 measured
Excel Modeling Benchmark (Vals AI)Not measured57.9%Only Kimi K2.6 measured
τ²-Bench Telecom47.1%95.9%Kimi K2.6
OSWorld 2.0Not measured4.6%Only Kimi K2.6 measured
Vending-Bench 2Not measured$6,205Only Kimi K2.6 measured
Berkeley Function Calling Leaderboard (BFCL)54.0%Not measuredOnly GPT-4.1 measured
BrowseComp-Plus36.4%Not measuredOnly GPT-4.1 measured
Neither model has a result on the other 22 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index011
Reasoning benchmarks for GPT-4.1 and Kimi K2.6
BenchmarkGPT-4.1Kimi K2.6Leader
GPQA Diamond65.4%89.1%Kimi K2.6
MMMU Pro (Vals AI)72.4%86.3%Kimi K2.6
GPQA Diamond (Artificial Analysis run)66.6%91.1%Kimi K2.6
Humanity's Last Exam (Artificial Analysis run)4.2%37.5%Kimi K2.6
GPQA Diamond (Epoch AI run)66.9%90.8%Kimi K2.6
ARC-AGI5.5%Not measuredOnly GPT-4.1 measured
ARC-AGI-20.4%Not measuredOnly GPT-4.1 measured
SimpleBench27.0%Not measuredOnly GPT-4.1 measured
Chess puzzles3.0%20.0%Kimi K2.6
Mystery game puzzlesNot measured18.0%Only Kimi K2.6 measured
EBR-benchNot measured2.4%Only Kimi K2.6 measured
LMArena Text: hard prompts13841470Kimi K2.6
LMArena Text: expert13641491Kimi K2.6
LMArena Text: hard prompts in English13931471Kimi K2.6
LMArena Vision: diagrams12151298Kimi K2.6
LMArena Vision: homework12481310Kimi K2.6
Kagi LLM Benchmark52.3%Not measuredOnly GPT-4.1 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 and Kimi K2.6
BenchmarkGPT-4.1Kimi K2.6Leader
AIME39.6%Not measuredOnly GPT-4.1 measured
MATH 500 (Vals AI)87.2%Not measuredOnly GPT-4.1 measured
MGSM (Vals AI)87.7%Not measuredOnly GPT-4.1 measured
AA Math Index34.7Not measuredOnly GPT-4.1 measured
AIME 2025 (Artificial Analysis run)34.7%Not measuredOnly GPT-4.1 measured
OTIS Mock AIME38.3%96.1%Kimi K2.6
FrontierMath, tiers 1 to 36.0%57.2%Kimi K2.6
FrontierMath, tier 4Not measured25.6%Only Kimi K2.6 measured
ProofBenchNot measured16.0%Only Kimi K2.6 measured
MATH level 583.0%Not measuredOnly GPT-4.1 measured
LMArena Text: math13691474Kimi K2.6
LMArena Text: mathematical work13601480Kimi K2.6
Neither model has a result on the other 1 board here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index38
Knowledge benchmarks for GPT-4.1 and Kimi K2.6
BenchmarkGPT-4.1Kimi K2.6Leader
MMLU Pro80.5%87.6%Kimi K2.6
LegalBench (Vals AI)83.1%84.7%Kimi K2.6
CaseLaw (Vals AI)69.9%61.2%GPT-4.1
CorpFin (Vals AI)63.0%66.7%Kimi K2.6
TaxEval (Vals AI)75.1%74.7%GPT-4.1
MortgageTax (Vals AI)65.9%65.8%GPT-4.1
MedQA (Vals AI)91.2%Not measuredOnly GPT-4.1 measured
MedCode (Vals AI)Not measured40.1%Only Kimi K2.6 measured
MMLU Pro (Artificial Analysis run)80.6%Not measuredOnly GPT-4.1 measured
SimpleQA Verified31.1%34.9%Kimi K2.6
GeoBench72.0%Not measuredOnly GPT-4.1 measured
LMArena Text: science13821468Kimi K2.6
LMArena Text: medicine and healthcare13791457Kimi K2.6
LMArena Text: legal and government13991462Kimi K2.6
LMArena Text: business and finance13691445Kimi K2.6
FACTS Benchmark Suite45.8%Not measuredOnly GPT-4.1 measured
Neither model has a result on the other 2 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index06
Web design benchmarks for GPT-4.1 and Kimi K2.6
BenchmarkGPT-4.1Kimi K2.6Leader
Design Arena: websites10391269Kimi K2.6
Design Arena: UI components10001266Kimi K2.6
Design Arena: game dev10801251Kimi K2.6
Design Arena: data viz11041249Kimi K2.6
Design Arena: 3D8501268Kimi K2.6
Design Arena: all code categories10261272Kimi K2.6
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 index027
General benchmarks for GPT-4.1 and Kimi K2.6
BenchmarkGPT-4.1Kimi K2.6Leader
Public Benefits Bench (Vals AI)Not measured56.6%Only Kimi K2.6 measured
SAGE (Vals AI)Not measured50.2%Only Kimi K2.6 measured
MedScribe (Vals AI)Not measured78.2%Only Kimi K2.6 measured
Vals Multimodal IndexNot measured56.4%Only Kimi K2.6 measured
IFBench43.0%76.0%Kimi K2.6
Long context reasoning (AA-LCR)68.3%81.0%Kimi K2.6
DTBench68.3%90.9%Kimi K2.6
LMCA25.6%37.3%Kimi K2.6
Fiction.LiveBench63.9%Not measuredOnly GPT-4.1 measured
Furniture assemblyNot measured21.7%Only Kimi K2.6 measured
ExploitBenchNot measured18.4%Only Kimi K2.6 measured
LMArena Text13831455Kimi K2.6
LMArena Text: instruction following13671451Kimi K2.6
LMArena Text: creative writing13631434Kimi K2.6
LMArena Vision12101282Kimi K2.6
LMArena Text: English13921460Kimi K2.6
LMArena Text: non-English13701446Kimi K2.6
LMArena Text: Chinese13821520Kimi K2.6
LMArena Text: German13811451Kimi K2.6
LMArena Text: Japanese13191443Kimi K2.6
LMArena Text: Korean13381427Kimi K2.6
LMArena Text: French13821471Kimi K2.6
LMArena Text: Spanish13761464Kimi K2.6
LMArena Text: Russian13771446Kimi K2.6
LMArena Text: Polish13891438Kimi K2.6
LMArena Text: multi-turn13971453Kimi K2.6
LMArena Text: longer queries13851468Kimi K2.6
LMArena Text: writing and language13711439Kimi K2.6
LMArena Text: entertainment and media13651428Kimi K2.6
LMArena Vision: English12091287Kimi K2.6
LMArena Vision: Chinese12261346Kimi K2.6
LMArena Vision: reading text12181291Kimi K2.6
LMArena Vision: humor11961280Kimi K2.6
LMArena Vision: captioning1207Not measuredOnly GPT-4.1 measured
LMArena Vision: recognizing things1208Not measuredOnly GPT-4.1 measured
LMArena Vision: creative writing12101273Kimi K2.6
LMArena DocumentNot measured1451Only Kimi K2.6 measured
Neither model has a result on the other 9 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for GPT-4.1 and Kimi K2.6
BenchmarkGPT-4.1Kimi 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-4.1$0.0060Fits in one request
Kimi K2.6$0.0029Fits in one request

Kimi K2.6 costs less

Repository review

50K input + 3K output tokens

GPT-4.1$0.124Fits in one request
Kimi K2.6$0.059Fits in one request

Kimi K2.6 costs less

Agent loop

200K input + 10K output tokens

GPT-4.1$0.480Fits in one request
Kimi K2.6$0.230Fits in one request

Kimi K2.6 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 and Kimi K2.6
SpecificationOpenAI GPT-4.1MoonshotAI Kimi K2.6
MakerOpenAIMoonshot AI
WeightsNo public weights listedOpen weights
ReleasedApril 14, 2025April 20, 2026
Context window1.05M262K
Input $/Mtok$2.00$0.95
Output $/Mtok$8.00$4.00
Coding indexNot benchmarked52.1
Independent measurements behind it03
Cost per solved task$0.37$0.35
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-4.1 better than Kimi K2.6 for coding?

Only Kimi K2.6 has a coding score, 52.1 on the Vibe Coding Index; GPT-4.1 has none, so the two cannot be ranked on coding. Pick GPT-4.1 for a larger context window (1.05M against 262K tokens) and work measured by CaseLaw (Vals AI) or TaxEval (Vals AI), where it leads.

Which is cheaper, GPT-4.1 or Kimi K2.6?

GPT-4.1 costs $2.00 per million input tokens and $8.00 per million output tokens; Kimi K2.6 costs $0.95 and $4.00. Per solved SWE-bench Verified task, GPT-4.1 costs $0.37 and Kimi K2.6 $0.35.

Which has the bigger context window, GPT-4.1 or Kimi K2.6?

GPT-4.1, with 1.05M tokens against 262K.

How many benchmarks is the GPT-4.1 vs Kimi K2.6 comparison based on?

68 benchmarks have a result for both models as of October 21, 2026. GPT-4.1's coding index rests on 0 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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