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GPT-4o (2024-05-13) vs Kimi K2.6

Kimi K2.6 leads GPT-4o (2024-05-13) on the Artificial Analysis Intelligence Index, 27.0 to 7.3, and Kimi K2.6 costs 3.8x less per output token ($4.00 vs $15.00 per million). Updated October 22, 2026; 38 benchmarks have a result for both.

Replace GPT-4o (2024-05-13) Replace Kimi K2.6
GPT-4o (2024-05-13)OpenAI
Coding
No data
Overall
27.1
Output $/M
$15.00
0
Kimi K2.6Moonshot AI
Coding
52.1
Overall
60.5
Output $/M
$4.00
38
vs boards won of 38 shared

GPT-4o (2024-05-13) or Kimi K2.6: which to pick

Only Kimi K2.6 has a coding score, 52.1 on the Vibe Coding Index; GPT-4o (2024-05-13) has none, so the two cannot be ranked on coding.

Compare them on price, context and the boards below.

Model AGPT-4o (2024-05-13)OpenAINot benchmarkedNo coding benchmarkNo cost per solved taskModel BKimi K2.6Moonshot AI52.1/1003 independent benchmarks$0.35 per solved task
Shared results
38
GPT-4o (2024-05-13) only
6
Kimi K2.6 only
73
Like-for-like categories
6 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-4o (2024-05-13) not benchmarked, Kimi K2.6 52.1 from 3 benchmarks.
Widest category
Math, 51.4 points apart on average over 3 shared benchmarks.
Widest single gap
OTIS Mock AIME: GPT-4o (2024-05-13) 6.3% against Kimi K2.6 96.1%, 89.9 points apart on a 0 to 100 scale.
Output price
GPT-4o (2024-05-13) $15.00 against Kimi K2.6 $4.00 per million output tokens, 3.8x apart.
Context window
GPT-4o (2024-05-13) takes 128K 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-4o (2024-05-13)BarsKimi K2.6Ties
Coding03
Intelligence01
Reasoning07
Math03
Knowledge04
General020
All shared boards038
CodingLike-for-likeSix of these boards feed the Vibe Coding Index03
Coding benchmarks for GPT-4o (2024-05-13) and Kimi K2.6
BenchmarkGPT-4o (2024-05-13)Kimi K2.6Leader
LMArena WebDevNot measured1509Only Kimi K2.6 measured
AA Coding Index24.261.8Kimi K2.6
LiveCodeBench (Vals AI)Not measured86.8%Only Kimi K2.6 measured
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)33.4%Not measuredOnly GPT-4o (2024-05-13) measured
SciCodeNot measured51.5%Only Kimi K2.6 measured
Terminal-Bench Hard (Artificial Analysis run)Not measured43.9%Only Kimi K2.6 measured
WeirdMLNot measured55.9%Only Kimi K2.6 measured
ALE-BenchNot measured1092.7Only Kimi K2.6 measured
LMArena Text: coding12971489Kimi K2.6
LMArena Text: software and IT12971484Kimi 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
Neither model has a result on the other 25 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
Intelligence benchmarks for GPT-4o (2024-05-13) and Kimi K2.6
BenchmarkGPT-4o (2024-05-13)Kimi K2.6Leader
AA Intelligence Index7.327.0Kimi K2.6
Epoch Capabilities IndexNot measured150.9Only Kimi K2.6 measured
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index19 boards, none shared
Agentic work benchmarks for GPT-4o (2024-05-13) and Kimi K2.6
BenchmarkGPT-4o (2024-05-13)Kimi 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 measured1156Only 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 measured1124Only Kimi K2.6 measured
Design Arena: PowerPoint slidesNot measured1102Only 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 TelecomNot measured95.9%Only Kimi K2.6 measured
METR time horizons40.8%Not measuredOnly GPT-4o (2024-05-13) measured
OSWorld 2.0Not measured4.6%Only Kimi K2.6 measured
BALROG32.3%Not measuredOnly GPT-4o (2024-05-13) 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 index07
Reasoning benchmarks for GPT-4o (2024-05-13) and Kimi K2.6
BenchmarkGPT-4o (2024-05-13)Kimi K2.6Leader
GPQA Diamond50.2%89.1%Kimi K2.6
MMMU Pro (Vals AI)Not measured86.3%Only Kimi K2.6 measured
GPQA Diamond (Artificial Analysis run)52.6%91.1%Kimi K2.6
Humanity's Last Exam (Artificial Analysis run)1.8%37.5%Kimi K2.6
GPQA Diamond (Epoch AI run)48.9%90.8%Kimi K2.6
Chess puzzlesNot measured20.0%Only Kimi K2.6 measured
Mystery game puzzlesNot measured18.0%Only Kimi K2.6 measured
EBR-benchNot measured2.4%Only Kimi K2.6 measured
LMArena Text: hard prompts12811470Kimi K2.6
LMArena Text: expert12501491Kimi K2.6
LMArena Text: hard prompts in English12931471Kimi K2.6
LMArena Vision: diagramsNot measured1298Only Kimi K2.6 measured
LMArena Vision: homeworkNot measured1310Only Kimi K2.6 measured
Neither model has a result on the other 10 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index03
Math benchmarks for GPT-4o (2024-05-13) and Kimi K2.6
BenchmarkGPT-4o (2024-05-13)Kimi K2.6Leader
OTIS Mock AIME6.3%96.1%Kimi K2.6
FrontierMath, tiers 1 to 3Not measured57.2%Only Kimi K2.6 measured
FrontierMath, tier 4Not measured25.6%Only Kimi K2.6 measured
ProofBenchNot measured16.0%Only Kimi K2.6 measured
MATH level 551.0%Not measuredOnly GPT-4o (2024-05-13) measured
LMArena Text: math12841474Kimi K2.6
LMArena Text: mathematical work12841480Kimi K2.6
MathArenaNot measured24.5%Only Kimi K2.6 measured
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index04
Knowledge benchmarks for GPT-4o (2024-05-13) and Kimi K2.6
BenchmarkGPT-4o (2024-05-13)Kimi K2.6Leader
MMLU ProNot measured87.6%Only Kimi K2.6 measured
LegalBench (Vals AI)Not measured84.7%Only Kimi K2.6 measured
CaseLaw (Vals AI)Not measured61.2%Only Kimi K2.6 measured
CorpFin (Vals AI)Not measured66.7%Only Kimi K2.6 measured
TaxEval (Vals AI)Not measured74.7%Only Kimi K2.6 measured
MortgageTax (Vals AI)Not measured65.8%Only Kimi K2.6 measured
MedCode (Vals AI)Not measured40.1%Only Kimi K2.6 measured
MMLU Pro (Artificial Analysis run)74.0%Not measuredOnly GPT-4o (2024-05-13) measured
SimpleQA VerifiedNot measured34.9%Only Kimi K2.6 measured
MMLU84.2%Not measuredOnly GPT-4o (2024-05-13) measured
LMArena Text: science12951468Kimi K2.6
LMArena Text: medicine and healthcare12781457Kimi K2.6
LMArena Text: legal and government13141462Kimi K2.6
LMArena Text: business and finance12621445Kimi 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-4o (2024-05-13) and Kimi K2.6
BenchmarkGPT-4o (2024-05-13)Kimi K2.6Leader
Design Arena: websitesNot measured1269Only Kimi K2.6 measured
Design Arena: UI componentsNot measured1264Only Kimi K2.6 measured
Design Arena: game devNot measured1250Only Kimi K2.6 measured
Design Arena: data vizNot measured1249Only Kimi K2.6 measured
Design Arena: 3DNot measured1267Only Kimi K2.6 measured
Design Arena: all code categoriesNot measured1271Only Kimi K2.6 measured
Design Arena: SVGNot measured1180Only 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 index020
General benchmarks for GPT-4o (2024-05-13) and Kimi K2.6
BenchmarkGPT-4o (2024-05-13)Kimi 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
IFBenchNot measured76.0%Only Kimi K2.6 measured
Long context reasoning (AA-LCR)Not measured81.0%Only Kimi K2.6 measured
DTBenchNot measured90.9%Only Kimi K2.6 measured
LMCANot measured37.3%Only Kimi K2.6 measured
Furniture assemblyNot measured21.7%Only Kimi K2.6 measured
ExploitBenchNot measured18.4%Only Kimi K2.6 measured
LMArena Text13001455Kimi K2.6
LMArena Text: instruction following12781451Kimi K2.6
LMArena Text: creative writing12911434Kimi K2.6
LMArena Vision11371282Kimi K2.6
LMArena Text: English13121460Kimi K2.6
LMArena Text: non-English12831446Kimi K2.6
LMArena Text: Chinese12771520Kimi K2.6
LMArena Text: German12831451Kimi K2.6
LMArena Text: Japanese12571443Kimi K2.6
LMArena Text: Korean12341427Kimi K2.6
LMArena Text: French13041471Kimi K2.6
LMArena Text: Spanish12921464Kimi K2.6
LMArena Text: Russian12851446Kimi K2.6
LMArena Text: Polish13651438Kimi K2.6
LMArena Text: multi-turn13021453Kimi K2.6
LMArena Text: longer queries12881468Kimi K2.6
LMArena Text: writing and language12981439Kimi K2.6
LMArena Text: entertainment and media12891428Kimi K2.6
LMArena Vision: English11471287Kimi K2.6
LMArena Vision: Chinese11321346Kimi K2.6
LMArena Vision: reading textNot measured1291Only Kimi K2.6 measured
LMArena Vision: humorNot measured1280Only Kimi K2.6 measured
LMArena Vision: creative writingNot measured1273Only Kimi K2.6 measured
LMArena DocumentNot measured1451Only Kimi K2.6 measured
EQ-Bench 4Not measured1202Only Kimi K2.6 measured
Neither model has a result on the other 13 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for GPT-4o (2024-05-13) and Kimi K2.6
BenchmarkGPT-4o (2024-05-13)Kimi 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-4o (2024-05-13)$0.013Fits in one request
Kimi K2.6$0.0029Fits in one request

Kimi K2.6 costs less

Repository review

50K input + 3K output tokens

GPT-4o (2024-05-13)$0.295Fits in one request
Kimi K2.6$0.059Fits in one request

Kimi K2.6 costs less

Agent loop

200K input + 10K output tokens

GPT-4o (2024-05-13)$1.15Exceeds the context window
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-4o (2024-05-13) and Kimi K2.6
SpecificationOpenAI GPT-4o (2024-05-13)MoonshotAI Kimi K2.6
MakerOpenAIMoonshot AI
WeightsNo public weights listedOpen weights
ReleasedMay 13, 2024April 20, 2026
Context window128K262K
Input $/Mtok$5.00$0.95
Output $/Mtok$15.00$4.00
Coding indexNot benchmarked52.1
Independent measurements behind it03
Cost per solved taskNot computable$0.35
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-4o (2024-05-13) better than Kimi K2.6 for coding?

Only Kimi K2.6 has a coding score, 52.1 on the Vibe Coding Index; GPT-4o (2024-05-13) has none, so the two cannot be ranked on coding. Compare them on price, context and the boards below.

Which is cheaper, GPT-4o (2024-05-13) or Kimi K2.6?

GPT-4o (2024-05-13) costs $5.00 per million input tokens and $15.00 per million output tokens; Kimi K2.6 costs $0.95 and $4.00. Cost per solved task is known for Kimi K2.6 only.

Which has the bigger context window, GPT-4o (2024-05-13) or Kimi K2.6?

Kimi K2.6, with 262K tokens against 128K.

How many benchmarks is the GPT-4o (2024-05-13) vs Kimi K2.6 comparison based on?

38 benchmarks have a result for both models as of October 22, 2026. GPT-4o (2024-05-13)'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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