Enter opens the highlighted result. Esc closes.

GPT-5.4 Nano vs Kimi K2.6

Kimi K2.6 leads GPT-5.4 Nano on coding, 52.1 to 44.8 on the Vibe Coding Index, and GPT-5.4 Nano costs 3.2x less per output token ($1.25 vs $4.00 per million). Updated October 22, 2026; 80 benchmarks have a result for both.

Replace GPT-5.4 Nano Replace Kimi K2.6
GPT-5.4 NanoOpenAI
Coding
44.8
Overall
45.7
Output $/M
$1.25
2
Kimi K2.6Moonshot AI
Coding
52.1
Overall
60.5
Output $/M
$4.00
78
vs boards won of 80 shared

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

Pick Kimi K2.6 for coding: it scores 52.1 on the Vibe Coding Index against 44.8 for GPT-5.4 Nano.

Pick GPT-5.4 Nano for output tokens 3.2x cheaper ($1.25 vs $4.00 per million) and a lower cost per solved task ($0.14 against $0.35).

Model AGPT-5.4 NanoOpenAI44.8/1002 independent benchmarks$0.14 per solved taskModel BKimi K2.6Moonshot AI52.1/1003 independent benchmarks$0.35 per solved task
Shared results
80
GPT-5.4 Nano only
5
Kimi K2.6 only
29
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 Nano 44.8 from 2 benchmarks, Kimi K2.6 52.1 from 3 benchmarks.
Widest category
Reasoning, 13.6 points apart on average over 12 shared benchmarks.
Widest single gap
Chess puzzles: GPT-5.4 Nano 45.0% against Kimi K2.6 20.0%, 25.0 points apart on a 0 to 100 scale.
Output price
GPT-5.4 Nano $1.25 against Kimi K2.6 $4.00 per million output tokens, 3.2x apart.
Context window
GPT-5.4 Nano 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 NanoBarsKimi K2.6Ties
Coding012
Intelligence02
Agentic work06
Reasoning111
Math06
Knowledge111
General030
All shared boards278
CodingLike-for-likeSix of these boards feed the Vibe Coding Index012
Coding benchmarks for GPT-5.4 Nano and Kimi K2.6
BenchmarkGPT-5.4 NanoKimi K2.6Leader
LMArena WebDevNot measured1509Only Kimi K2.6 measured
AA Coding Index56.161.8Kimi K2.6
LiveCodeBench (Vals AI)84.0%86.8%Kimi K2.6
SWE-bench Verified (Vals AI)69.8%76.2%Kimi K2.6
Vibe Code Bench (Vals AI)26.1%37.9%Kimi K2.6
Code migration (Vals AI)14.5%27.8%Kimi K2.6
ProgramBench (Vals AI)Not measured0.0%Only Kimi K2.6 measured
Terminal-Bench 2.1 (Vals AI)41.6%53.6%Kimi K2.6
SciCode47.2%51.5%Kimi K2.6
Terminal-Bench Hard (Artificial Analysis run)42.4%43.9%Kimi K2.6
WeirdML49.2%55.9%Kimi K2.6
ALE-Bench1004.51092.7Kimi K2.6
LMArena Text: coding14041489Kimi K2.6
LMArena Text: software and IT14021484Kimi 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 22 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for GPT-5.4 Nano and Kimi K2.6
BenchmarkGPT-5.4 NanoKimi K2.6Leader
AA Intelligence Index20.727.0Kimi K2.6
Epoch Capabilities Index146.0150.9Kimi K2.6
Agentic workLike-for-likePublic boards, shown as published, kept out of the index06
Agentic work benchmarks for GPT-5.4 Nano and Kimi K2.6
BenchmarkGPT-5.4 NanoKimi K2.6Leader
AA Agentic Index16.020.5Kimi 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 measured1156Only Kimi K2.6 measured
Design Arena: agents building Android appsNot measured1161Only 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 measured1135Only Kimi K2.6 measured
Design Arena: PowerPoint slidesNot measured1103Only Kimi K2.6 measured
Design Arena: spreadsheetsNot measured1276Only Kimi K2.6 measured
Finance Agent (Vals AI)38.2%44.9%Kimi K2.6
Tax Agent Bench (Vals AI)5.0%12.4%Kimi K2.6
Legal Research Bench (Vals AI)6.3%15.9%Kimi K2.6
Excel Modeling Benchmark (Vals AI)44.8%57.9%Kimi K2.6
τ²-Bench Telecom76.0%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
Neither model has a result on the other 24 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index111
Reasoning benchmarks for GPT-5.4 Nano and Kimi K2.6
BenchmarkGPT-5.4 NanoKimi K2.6Leader
GPQA Diamond77.5%89.1%Kimi K2.6
MMMU Pro (Vals AI)73.6%86.3%Kimi K2.6
GPQA Diamond (Artificial Analysis run)81.7%91.1%Kimi K2.6
Humanity's Last Exam (Artificial Analysis run)28.3%37.5%Kimi K2.6
GPQA Diamond (Epoch AI run)78.5%90.8%Kimi K2.6
ARC-AGI51.5%Not measuredOnly GPT-5.4 Nano measured
ARC-AGI-25.7%Not measuredOnly GPT-5.4 Nano measured
Chess puzzles45.0%20.0%GPT-5.4 Nano
Mystery game puzzles9.0%18.0%Kimi K2.6
EBR-benchNot measured2.4%Only Kimi K2.6 measured
LMArena Text: hard prompts13811470Kimi K2.6
LMArena Text: expert13961491Kimi K2.6
LMArena Text: hard prompts in English13871471Kimi K2.6
LMArena Vision: diagrams12101298Kimi K2.6
LMArena Vision: homework12251310Kimi K2.6
Kagi LLM Benchmark39.7%Not measuredOnly GPT-5.4 Nano measured
Neither model has a result on the other 6 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index06
Math benchmarks for GPT-5.4 Nano and Kimi K2.6
BenchmarkGPT-5.4 NanoKimi K2.6Leader
AIME88.8%Not measuredOnly GPT-5.4 Nano measured
OTIS Mock AIME87.8%96.1%Kimi K2.6
FrontierMath, tiers 1 to 344.9%57.2%Kimi K2.6
FrontierMath, tier 412.2%25.6%Kimi K2.6
ProofBench5.0%16.0%Kimi K2.6
LMArena Text: math14051474Kimi K2.6
LMArena Text: mathematical work14091480Kimi K2.6
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index111
Knowledge benchmarks for GPT-5.4 Nano and Kimi K2.6
BenchmarkGPT-5.4 NanoKimi K2.6Leader
MMLU Pro77.2%87.6%Kimi K2.6
LegalBench (Vals AI)77.9%84.7%Kimi K2.6
CaseLaw (Vals AI)51.9%61.2%Kimi K2.6
CorpFin (Vals AI)61.2%66.7%Kimi K2.6
TaxEval (Vals AI)67.4%74.7%Kimi K2.6
MortgageTax (Vals AI)59.1%65.8%Kimi K2.6
MedCode (Vals AI)41.0%40.1%GPT-5.4 Nano
SimpleQA Verified11.7%34.9%Kimi K2.6
LMArena Text: science13741468Kimi K2.6
LMArena Text: medicine and healthcare13691457Kimi K2.6
LMArena Text: legal and government13681462Kimi K2.6
LMArena Text: business and finance13661445Kimi 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 Nano and Kimi K2.6
BenchmarkGPT-5.4 NanoKimi K2.6Leader
Design Arena: websitesNot measured1268Only Kimi K2.6 measured
Design Arena: UI componentsNot measured1263Only 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 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 index030
General benchmarks for GPT-5.4 Nano and Kimi K2.6
BenchmarkGPT-5.4 NanoKimi K2.6Leader
Public Benefits Bench (Vals AI)Not measured56.6%Only Kimi K2.6 measured
SAGE (Vals AI)38.1%50.2%Kimi K2.6
MedScribe (Vals AI)77.1%78.2%Kimi K2.6
Vals Multimodal Index47.6%56.4%Kimi K2.6
IFBench75.9%76.0%Kimi K2.6
Long context reasoning (AA-LCR)76.7%81.0%Kimi K2.6
DTBench80.3%90.9%Kimi K2.6
LMCA36.9%37.3%Kimi K2.6
Furniture assemblyNot measured21.7%Only Kimi K2.6 measured
ExploitBenchNot measured18.4%Only Kimi K2.6 measured
LMArena Text13721455Kimi K2.6
LMArena Text: instruction following13621451Kimi K2.6
LMArena Text: creative writing13151434Kimi K2.6
LMArena Vision11961282Kimi K2.6
LMArena Text: English13811460Kimi K2.6
LMArena Text: non-English13591446Kimi K2.6
LMArena Text: Chinese13911520Kimi K2.6
LMArena Text: German13681451Kimi K2.6
LMArena Text: Japanese13431443Kimi K2.6
LMArena Text: Korean13211427Kimi K2.6
LMArena Text: French13951471Kimi K2.6
LMArena Text: Spanish13711464Kimi K2.6
LMArena Text: Russian13631446Kimi K2.6
LMArena Text: Polish13661438Kimi K2.6
LMArena Text: multi-turn13821453Kimi K2.6
LMArena Text: longer queries13651468Kimi K2.6
LMArena Text: writing and language13381439Kimi K2.6
LMArena Text: entertainment and media13251428Kimi K2.6
LMArena Vision: English12021287Kimi K2.6
LMArena Vision: Chinese12321346Kimi K2.6
LMArena Vision: reading text12041291Kimi K2.6
LMArena Vision: humor11611280Kimi K2.6
LMArena Vision: recognizing things1141Not measuredOnly GPT-5.4 Nano measured
LMArena Vision: creative writing11591273Kimi 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 Nano and Kimi K2.6
BenchmarkGPT-5.4 NanoKimi 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 Nano$0.0008Fits in one request
Kimi K2.6$0.0029Fits in one request

GPT-5.4 Nano costs less

Repository review

50K input + 3K output tokens

GPT-5.4 Nano$0.014Fits in one request
Kimi K2.6$0.059Fits in one request

GPT-5.4 Nano costs less

Agent loop

200K input + 10K output tokens

GPT-5.4 Nano$0.052Fits in one request
Kimi K2.6$0.230Fits in one request

GPT-5.4 Nano 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 Nano and Kimi K2.6
SpecificationOpenAI GPT-5.4 NanoMoonshotAI Kimi K2.6
MakerOpenAIMoonshot AI
WeightsNo public weights listedOpen weights
ReleasedMarch 17, 2026April 20, 2026
Context window400K262K
Input $/Mtok$0.20$0.95
Output $/Mtok$1.25$4.00
Coding index44.852.1
Independent measurements behind it23
Cost per solved task$0.14$0.35
SourceOpenRouter listingOpenRouter listing

Questions

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

Pick Kimi K2.6 for coding: it scores 52.1 on the Vibe Coding Index against 44.8 for GPT-5.4 Nano. Pick GPT-5.4 Nano for output tokens 3.2x cheaper ($1.25 vs $4.00 per million) and a lower cost per solved task ($0.14 against $0.35).

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

GPT-5.4 Nano costs $0.20 per million input tokens and $1.25 per million output tokens; Kimi K2.6 costs $0.95 and $4.00. Per solved SWE-bench Verified task, GPT-5.4 Nano costs $0.14 and Kimi K2.6 $0.35.

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

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

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

80 benchmarks have a result for both models as of October 22, 2026. GPT-5.4 Nano's coding index rests on 2 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.

Compare next

Embed this comparison on your site

Free under CC BY 4.0, while the source link stays visible. Preview the frame · Terms and other embeds

<iframe src="https://llmbenchmark.ai/embed/compare/gpt-5-4-nano-vs-kimi-k2-6" title="GPT-5.4 Nano vs Kimi K2.6, LLMBenchmark.ai" width="100%" height="360" style="border:0;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/gpt-5-4-nano-vs-kimi-k2-6">LLMBenchmark.ai, GPT-5.4 Nano vs Kimi K2.6</a></p>