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GPT-5 Mini vs Kimi K2.6

Kimi K2.6 leads GPT-5 Mini on coding, 52.1 to 34.2 on the Vibe Coding Index, and GPT-5 Mini costs 2.0x less per output token ($2.00 vs $4.00 per million). Updated October 22, 2026; 79 benchmarks have a result for both.

Replace GPT-5 Mini Replace Kimi K2.6
GPT-5 MiniOpenAI
Coding
34.2
Overall
43.7
Output $/M
$2.00
6
Kimi K2.6Moonshot AI
Coding
52.1
Overall
60.5
Output $/M
$4.00
73
vs boards won of 79 shared

GPT-5 Mini or Kimi K2.6: which to pick

Pick Kimi K2.6 for coding: it scores 52.1 on the Vibe Coding Index against 34.2 for GPT-5 Mini.

Pick GPT-5 Mini for output tokens 2.0x cheaper ($2.00 vs $4.00 per million) and a lower cost per solved task ($0.08 against $0.35).

Model AGPT-5 MiniOpenAI34.2/1002 independent benchmarks$0.08 per solved taskModel BKimi K2.6Moonshot AI52.1/1003 independent benchmarks$0.35 per solved task
Shared results
79
GPT-5 Mini only
22
Kimi K2.6 only
30
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-5 Mini 34.2 from 2 benchmarks, Kimi K2.6 52.1 from 3 benchmarks.
Widest category
Agentic work, 31.8 points apart on average over 2 shared benchmarks.
Widest single gap
Vending-Bench 2: GPT-5 Mini -$31 against Kimi K2.6 $6,205, 38.8 points apart on a 0 to 100 scale.
Output price
GPT-5 Mini $2.00 against Kimi K2.6 $4.00 per million output tokens, 2.0x apart.
Context window
GPT-5 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 MiniBarsKimi K2.6Ties
Coding08
Intelligence02
Agentic work02
Reasoning111
Math06
Knowledge48
Web design08
General128
All shared boards673
CodingLike-for-likeSix of these boards feed the Vibe Coding Index08
Coding benchmarks for GPT-5 Mini and Kimi K2.6
BenchmarkGPT-5 MiniKimi K2.6Leader
SWE-bench Verified59.8%Not measuredOnly GPT-5 Mini measured
SWE-bench Multilingual39.7%Not measuredOnly GPT-5 Mini measured
LMArena WebDevNot measured1509Only Kimi K2.6 measured
AA Coding IndexNot measured61.8Only Kimi K2.6 measured
LiveCodeBench (Vals AI)86.6%86.8%Kimi K2.6
SWE-bench Verified (Vals AI)60.8%76.2%Kimi K2.6
Vibe Code Bench (Vals AI)14.2%37.9%Kimi K2.6
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)83.8%Not measuredOnly GPT-5 Mini measured
SciCode39.0%51.5%Kimi K2.6
Terminal-Bench Hard (Artificial Analysis run)33.3%43.9%Kimi K2.6
Terminal-Bench34.8%Not measuredOnly GPT-5 Mini measured
WeirdML52.7%55.9%Kimi K2.6
ALE-BenchNot measured1092.7Only Kimi K2.6 measured
LMArena Text: coding14061489Kimi K2.6
LMArena Text: software and IT13941484Kimi 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 18 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for GPT-5 Mini and Kimi K2.6
BenchmarkGPT-5 MiniKimi K2.6Leader
AA Intelligence Index20.627.0Kimi K2.6
Epoch Capabilities Index145.3150.9Kimi K2.6
Agentic workLike-for-likePublic boards, shown as published, kept out of the index02
Agentic work benchmarks for GPT-5 Mini and Kimi K2.6
BenchmarkGPT-5 MiniKimi 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 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)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 Telecom71.1%95.9%Kimi K2.6
OSWorld 2.0Not measured4.6%Only Kimi K2.6 measured
Vending-Bench 2-$31$6,205Kimi K2.6
Berkeley Function Calling Leaderboard (BFCL)55.5%Not measuredOnly GPT-5 Mini 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 Mini and Kimi K2.6
BenchmarkGPT-5 MiniKimi K2.6Leader
GPQA Diamond80.3%89.1%Kimi K2.6
MMMU Pro (Vals AI)78.9%86.3%Kimi K2.6
GPQA Diamond (Artificial Analysis run)82.8%91.1%Kimi K2.6
Humanity's Last Exam (Artificial Analysis run)21.5%37.5%Kimi K2.6
GPQA Diamond (Epoch AI run)75.0%90.8%Kimi K2.6
ARC-AGI54.3%Not measuredOnly GPT-5 Mini measured
ARC-AGI-24.4%Not measuredOnly GPT-5 Mini measured
Chess puzzles24.0%20.0%GPT-5 Mini
Mystery game puzzles10.0%18.0%Kimi K2.6
EBR-benchNot measured2.4%Only Kimi K2.6 measured
VPCT40.2%Not measuredOnly GPT-5 Mini measured
LMArena Text: hard prompts13801470Kimi K2.6
LMArena Text: expert13791491Kimi K2.6
LMArena Text: hard prompts in English13831471Kimi K2.6
LMArena Vision: diagrams12021298Kimi K2.6
LMArena Vision: homework12101310Kimi K2.6
Kagi LLM Benchmark70.3%Not measuredOnly GPT-5 Mini measured
Neither model has a result on the other 5 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index06
Math benchmarks for GPT-5 Mini and Kimi K2.6
BenchmarkGPT-5 MiniKimi K2.6Leader
AIME91.5%Not measuredOnly GPT-5 Mini measured
MATH 500 (Vals AI)94.8%Not measuredOnly GPT-5 Mini measured
MGSM (Vals AI)92.6%Not measuredOnly GPT-5 Mini measured
AA Math Index90.7Not measuredOnly GPT-5 Mini measured
AIME 2025 (Artificial Analysis run)90.7%Not measuredOnly GPT-5 Mini measured
OTIS Mock AIME86.7%96.1%Kimi K2.6
FrontierMath, tiers 1 to 346.7%57.2%Kimi K2.6
FrontierMath, tier 412.2%25.6%Kimi K2.6
ProofBench9.0%16.0%Kimi K2.6
MATH level 597.8%Not measuredOnly GPT-5 Mini measured
LMArena Text: math13781474Kimi K2.6
LMArena Text: mathematical work13801480Kimi K2.6
Neither model has a result on the other 1 board here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index48
Knowledge benchmarks for GPT-5 Mini and Kimi K2.6
BenchmarkGPT-5 MiniKimi K2.6Leader
MMLU Pro82.2%87.6%Kimi K2.6
LegalBench (Vals AI)81.8%84.7%Kimi K2.6
CaseLaw (Vals AI)68.5%61.2%GPT-5 Mini
CorpFin (Vals AI)60.2%66.7%Kimi K2.6
TaxEval (Vals AI)75.2%74.7%GPT-5 Mini
MortgageTax (Vals AI)66.9%65.8%GPT-5 Mini
MedQA (Vals AI)96.1%Not measuredOnly GPT-5 Mini measured
MedCode (Vals AI)43.0%40.1%GPT-5 Mini
MMLU Pro (Artificial Analysis run)83.7%Not measuredOnly GPT-5 Mini measured
SimpleQA Verified21.6%34.9%Kimi K2.6
LMArena Text: science13711468Kimi K2.6
LMArena Text: medicine and healthcare13801457Kimi K2.6
LMArena Text: legal and government13751462Kimi K2.6
LMArena Text: business and finance13581445Kimi K2.6
FACTS Benchmark Suite38.6%Not measuredOnly GPT-5 Mini measured
Neither model has a result on the other 3 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index08
Web design benchmarks for GPT-5 Mini and Kimi K2.6
BenchmarkGPT-5 MiniKimi K2.6Leader
Design Arena: websites11251268Kimi K2.6
Design Arena: UI components11031263Kimi K2.6
Design Arena: game dev11291250Kimi K2.6
Design Arena: data viz11311249Kimi K2.6
Design Arena: 3D10361267Kimi K2.6
Design Arena: all code categories11141271Kimi K2.6
Design Arena: SVG10911181Kimi K2.6
Design Arena: ASCII art11251165Kimi K2.6
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index128
General benchmarks for GPT-5 Mini and Kimi K2.6
BenchmarkGPT-5 MiniKimi K2.6Leader
Public Benefits Bench (Vals AI)Not measured56.6%Only Kimi K2.6 measured
SAGE (Vals AI)43.0%50.2%Kimi K2.6
MedScribe (Vals AI)80.6%78.2%GPT-5 Mini
Vals Multimodal IndexNot measured56.4%Only Kimi K2.6 measured
IFBench75.4%76.0%Kimi K2.6
Long context reasoning (AA-LCR)72.3%81.0%Kimi K2.6
DTBench80.5%90.9%Kimi K2.6
LMCA34.2%37.3%Kimi K2.6
Fiction.LiveBench69.4%Not measuredOnly GPT-5 Mini measured
Creative writing (Lech Mazur)83.1%Not measuredOnly GPT-5 Mini measured
Furniture assemblyNot measured21.7%Only Kimi K2.6 measured
ExploitBenchNot measured18.4%Only Kimi K2.6 measured
LMArena Text13731455Kimi K2.6
LMArena Text: instruction following13571451Kimi K2.6
LMArena Text: creative writing13251434Kimi K2.6
LMArena Vision12021282Kimi K2.6
LMArena Text: English13791460Kimi K2.6
LMArena Text: non-English13631446Kimi K2.6
LMArena Text: Chinese13861520Kimi K2.6
LMArena Text: German13661451Kimi K2.6
LMArena Text: Japanese13411443Kimi K2.6
LMArena Text: Korean13081427Kimi K2.6
LMArena Text: French13861471Kimi K2.6
LMArena Text: Spanish13541464Kimi K2.6
LMArena Text: Russian13621446Kimi K2.6
LMArena Text: Polish13781438Kimi K2.6
LMArena Text: multi-turn13631453Kimi K2.6
LMArena Text: longer queries13551468Kimi K2.6
LMArena Text: writing and language13441439Kimi K2.6
LMArena Text: entertainment and media13401428Kimi K2.6
LMArena Vision: English12161287Kimi K2.6
LMArena Vision: Chinese12141346Kimi K2.6
LMArena Vision: reading text11991291Kimi K2.6
LMArena Vision: humor12051280Kimi K2.6
LMArena Vision: captioning1217Not measuredOnly GPT-5 Mini measured
LMArena Vision: recognizing things1226Not measuredOnly GPT-5 Mini measured
LMArena Vision: creative writing11811273Kimi K2.6
LMArena DocumentNot measured1451Only Kimi K2.6 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-5 Mini and Kimi K2.6
BenchmarkGPT-5 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 Mini$0.0013Fits in one request
Kimi K2.6$0.0029Fits in one request

GPT-5 Mini costs less

Repository review

50K input + 3K output tokens

GPT-5 Mini$0.018Fits in one request
Kimi K2.6$0.059Fits in one request

GPT-5 Mini costs less

Agent loop

200K input + 10K output tokens

GPT-5 Mini$0.070Fits in one request
Kimi K2.6$0.230Fits in one request

GPT-5 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 Mini and Kimi K2.6
SpecificationOpenAI GPT-5 MiniMoonshotAI Kimi K2.6
MakerOpenAIMoonshot AI
WeightsNo public weights listedOpen weights
ReleasedAugust 7, 2025April 20, 2026
Context window400K262K
Input $/Mtok$0.25$0.95
Output $/Mtok$2.00$4.00
Coding index34.252.1
Independent measurements behind it23
Cost per solved task$0.08$0.35
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-5 Mini better than Kimi K2.6 for coding?

Pick Kimi K2.6 for coding: it scores 52.1 on the Vibe Coding Index against 34.2 for GPT-5 Mini. Pick GPT-5 Mini for output tokens 2.0x cheaper ($2.00 vs $4.00 per million) and a lower cost per solved task ($0.08 against $0.35).

Which is cheaper, GPT-5 Mini or Kimi K2.6?

GPT-5 Mini costs $0.25 per million input tokens and $2.00 per million output tokens; Kimi K2.6 costs $0.95 and $4.00. Per solved SWE-bench Verified task, GPT-5 Mini costs $0.08 and Kimi K2.6 $0.35.

Which has the bigger context window, GPT-5 Mini or Kimi K2.6?

GPT-5 Mini, with 400K tokens against 262K.

How many benchmarks is the GPT-5 Mini vs Kimi K2.6 comparison based on?

79 benchmarks have a result for both models as of October 22, 2026. GPT-5 Mini'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.

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<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/gpt-5-mini-vs-kimi-k2-6">LLMBenchmark.ai, GPT-5 Mini vs Kimi K2.6</a></p>