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GPT-6 Sol vs Kimi K2.6

GPT-6 Sol leads Kimi K2.6 on coding, 76.0 to 52.1 on the Vibe Coding Index, and Kimi K2.6 costs 2.5x less per output token ($4.00 vs $10.00 per million). Updated October 21, 2026; 80 benchmarks have a result for both.

Replace GPT-6 Sol Replace Kimi K2.6
GPT-6 SolOpenAI
Coding
76.0
Overall
74.6
Output $/M
$10.00
43
Kimi K2.6Moonshot AI
Coding
52.1
Overall
60.5
Output $/M
$4.00
36
vs boards won of 80 shared, 1 tied

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

Pick GPT-6 Sol for coding: it scores 76.0 on the Vibe Coding Index against 52.1 for Kimi K2.6.

Pick Kimi K2.6 for output tokens 2.5x cheaper ($4.00 vs $10.00 per million) and work measured by LMArena Text: coding or LMArena Text: software and IT, where it leads.

Model AGPT-6 SolOpenAI76.0/1005 independent benchmarksNo cost per solved taskModel BKimi K2.6Moonshot AI52.1/1003 independent benchmarks$0.35 per solved task
Shared results
80
GPT-6 Sol only
21
Kimi K2.6 only
29
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-6 Sol 76.0 from 5 benchmarks, Kimi K2.6 52.1 from 3 benchmarks.
Widest category
Math, 31.4 points apart on average over 6 shared benchmarks.
Widest single gap
ProofBench: GPT-6 Sol 83.0% against Kimi K2.6 16.0%, 67.0 points apart on a 0 to 100 scale.
Output price
GPT-6 Sol $10.00 against Kimi K2.6 $4.00 per million output tokens, 2.5x apart.
Context window
GPT-6 Sol 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-6 SolBarsKimi K2.6Ties
Coding102
Intelligence20
Agentic work71
Reasoning55
Math42
Knowledge24
Web design80
General5221 tie
All shared boards43361 tie
CodingLike-for-likeSix of these boards feed the Vibe Coding Index102
Coding benchmarks for GPT-6 Sol and Kimi K2.6
BenchmarkGPT-6 SolKimi K2.6Leader
LiveBench coding93.1%Not measuredOnly GPT-6 Sol measured
LMArena WebDev16831509GPT-6 Sol
AA Coding IndexNot measured61.8Only Kimi K2.6 measured
LiveCodeBench (Vals AI)Not measured86.8%Only Kimi K2.6 measured
SWE-bench Verified (Vals AI)Not measured76.2%Only Kimi K2.6 measured
Terminal-Bench 4 (Vals AI)44.4%Not measuredOnly GPT-6 Sol measured
Vibe Code Bench (Vals AI)87.8%37.9%GPT-6 Sol
Code migration (Vals AI)57.2%27.8%GPT-6 Sol
ProgramBench (Vals AI)2.0%0.0%GPT-6 Sol
IOI (Vals AI)82.6%Not measuredOnly GPT-6 Sol measured
Terminal-Bench 2.1 (Vals AI)83.2%53.6%GPT-6 Sol
CyberBench (Vals AI)78.0%Not measuredOnly GPT-6 Sol measured
SciCode57.6%51.5%GPT-6 Sol
Terminal-Bench Hard (Artificial Analysis run)Not measured43.9%Only Kimi K2.6 measured
FrontierCode49.3%Not measuredOnly GPT-6 Sol measured
WeirdMLNot measured55.9%Only Kimi K2.6 measured
ALE-Bench2462.01092.7GPT-6 Sol
LMArena Text: coding14481489Kimi K2.6
LMArena Text: software and IT14331484Kimi K2.6
LMArena WebDev: React16851505GPT-6 Sol
LMArena WebDev: HTML16851485GPT-6 Sol
LMArena WebDev: from an image16601521GPT-6 Sol
Neither model has a result on the other 17 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for GPT-6 Sol and Kimi K2.6
BenchmarkGPT-6 SolKimi K2.6Leader
AA Intelligence Index47.627.0GPT-6 Sol
Epoch Capabilities Index163.7150.9GPT-6 Sol
Agentic workLike-for-likePublic boards, shown as published, kept out of the index71
Agentic work benchmarks for GPT-6 Sol and Kimi K2.6
BenchmarkGPT-6 SolKimi K2.6Leader
AA Agentic IndexNot measured20.5Only Kimi K2.6 measured
Design Arena: agents building web apps12311268Kimi K2.6
Design Arena: agents building full-stack apps12381155GPT-6 Sol
Design Arena: agents building mobile apps12141157GPT-6 Sol
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
LiveBench research69.3%Not measuredOnly GPT-6 Sol measured
LiveBench browser92.0%Not measuredOnly GPT-6 Sol measured
LiveBench long agentic66.9%Not measuredOnly GPT-6 Sol measured
SREBench (Vals AI)30.5%Not measuredOnly GPT-6 Sol measured
Finance Agent (Vals AI)49.0%44.9%GPT-6 Sol
Tax Agent Bench (Vals AI)15.0%12.4%GPT-6 Sol
Legal Research Bench (Vals AI)28.9%15.9%GPT-6 Sol
Excel Modeling Benchmark (Vals AI)71.5%57.9%GPT-6 Sol
BioMysteryBench (Vals AI)74.8%Not measuredOnly GPT-6 Sol measured
Terminal-Bench-Science (Vals AI)30.0%Not measuredOnly GPT-6 Sol measured
Vals Science Index45.0%Not measuredOnly GPT-6 Sol measured
τ²-Bench TelecomNot measured95.9%Only Kimi K2.6 measured
APEX-Agents54.3%Not measuredOnly GPT-6 Sol measured
OSWorld 2.0Not measured4.6%Only Kimi K2.6 measured
SpireClimb7.5%Not measuredOnly GPT-6 Sol measured
Vending-Bench 2$14,428$6,205GPT-6 Sol
Neither model has a result on the other 15 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index55
Reasoning benchmarks for GPT-6 Sol and Kimi K2.6
BenchmarkGPT-6 SolKimi K2.6Leader
GPQA DiamondNot measured89.1%Only Kimi K2.6 measured
LiveBench reasoning88.7%Not measuredOnly GPT-6 Sol measured
MysteryMechanism (Vals AI)30.2%Not measuredOnly GPT-6 Sol measured
MMMU Pro (Vals AI)Not measured86.3%Only Kimi K2.6 measured
GPQA Diamond (Artificial Analysis run)Not measured91.1%Only Kimi K2.6 measured
Humanity's Last Exam (Artificial Analysis run)47.9%37.5%GPT-6 Sol
GPQA Diamond (Epoch AI run)94.3%90.8%GPT-6 Sol
ARC-AGI95.5%Not measuredOnly GPT-6 Sol measured
ARC-AGI-289.6%Not measuredOnly GPT-6 Sol measured
Chess puzzles56.0%20.0%GPT-6 Sol
Mystery game puzzles56.0%18.0%GPT-6 Sol
EBR-bench53.3%2.4%GPT-6 Sol
LMArena Text: hard prompts14221470Kimi K2.6
LMArena Text: expert14371491Kimi K2.6
LMArena Text: hard prompts in English14201471Kimi K2.6
LMArena Vision: diagrams12701298Kimi K2.6
LMArena Vision: homework12861310Kimi K2.6
Neither model has a result on the other 5 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index42
Math benchmarks for GPT-6 Sol and Kimi K2.6
BenchmarkGPT-6 SolKimi K2.6Leader
OTIS Mock AIME100.0%96.1%GPT-6 Sol
FrontierMath, tiers 1 to 389.8%57.2%GPT-6 Sol
FrontierMath, tier 490.0%25.6%GPT-6 Sol
ProofBench83.0%16.0%GPT-6 Sol
LMArena Text: math14071474Kimi K2.6
LMArena Text: mathematical work14241480Kimi K2.6
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index24
Knowledge benchmarks for GPT-6 Sol and Kimi K2.6
BenchmarkGPT-6 SolKimi 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)47.1%40.1%GPT-6 Sol
SimpleQA Verified60.7%34.9%GPT-6 Sol
LMArena Text: science13891468Kimi K2.6
LMArena Text: medicine and healthcare13661457Kimi K2.6
LMArena Text: legal and government13961462Kimi K2.6
LMArena Text: business and finance13801445Kimi K2.6
FACTS Benchmark Suite72.5%Not measuredOnly GPT-6 Sol measured
Neither model has a result on the other 5 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index80
Web design benchmarks for GPT-6 Sol and Kimi K2.6
BenchmarkGPT-6 SolKimi K2.6Leader
Design Arena: websites12921269GPT-6 Sol
Design Arena: UI components12921266GPT-6 Sol
Design Arena: game dev13141251GPT-6 Sol
Design Arena: data viz12691249GPT-6 Sol
Design Arena: 3D13181268GPT-6 Sol
Design Arena: all code categories13011272GPT-6 Sol
Design Arena: SVG13161181GPT-6 Sol
Design Arena: ASCII art12251165GPT-6 Sol
LiveBench design82.2%Not measuredOnly GPT-6 Sol measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index522
General benchmarks for GPT-6 Sol and Kimi K2.6
BenchmarkGPT-6 SolKimi K2.6Leader
LiveBench data analysis81.2%Not measuredOnly GPT-6 Sol measured
Public Benefits Bench (Vals AI)56.6%56.6%Tie
SAGE (Vals AI)44.8%50.2%Kimi K2.6
MedScribe (Vals AI)82.0%78.2%GPT-6 Sol
Vals Multimodal IndexNot measured56.4%Only Kimi K2.6 measured
IFBenchNot measured76.0%Only Kimi K2.6 measured
Long context reasoning (AA-LCR)83.7%81.0%GPT-6 Sol
DTBench97.3%90.9%GPT-6 Sol
LMCA59.1%37.3%GPT-6 Sol
Furniture assembly58.3%21.7%GPT-6 Sol
ExploitBenchNot measured18.4%Only Kimi K2.6 measured
LMArena Text13981455Kimi K2.6
LMArena Text: instruction following14131451Kimi K2.6
LMArena Text: creative writing13781434Kimi K2.6
LMArena Vision12401282Kimi K2.6
LMArena Text: English13961460Kimi K2.6
LMArena Text: non-English13881446Kimi K2.6
LMArena Text: Chinese14121520Kimi K2.6
LMArena Text: German13791451Kimi K2.6
LMArena Text: Japanese13771443Kimi K2.6
LMArena Text: Korean13361427Kimi K2.6
LMArena Text: French13991471Kimi K2.6
LMArena Text: Spanish13871464Kimi K2.6
LMArena Text: Russian14021446Kimi K2.6
LMArena Text: Polish13721438Kimi K2.6
LMArena Text: multi-turn14141453Kimi K2.6
LMArena Text: longer queries14161468Kimi K2.6
LMArena Text: writing and language13891439Kimi K2.6
LMArena Text: entertainment and media13731428Kimi K2.6
LMArena Vision: English12291287Kimi K2.6
LMArena Vision: ChineseNot measured1346Only Kimi K2.6 measured
LMArena Vision: reading text12581291Kimi K2.6
LMArena Vision: humorNot measured1280Only Kimi K2.6 measured
LMArena Vision: creative writing12191273Kimi 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-6 Sol and Kimi K2.6
BenchmarkGPT-6 SolKimi 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-6 Sol$0.0070Fits in one request
Kimi K2.6$0.0029Fits in one request

Kimi K2.6 costs less

Repository review

50K input + 3K output tokens

GPT-6 Sol$0.130Fits in one request
Kimi K2.6$0.059Fits in one request

Kimi K2.6 costs less

Agent loop

200K input + 10K output tokens

GPT-6 Sol$0.500Fits 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-6 Sol and Kimi K2.6
SpecificationOpenAI GPT-6 SolMoonshotAI Kimi K2.6
MakerOpenAIMoonshot AI
WeightsNo public weights listedOpen weights
ReleasedSeptember 22, 2026April 20, 2026
Context window1.05M262K
Input $/Mtok$2.00$0.95
Output $/Mtok$10.00$4.00
Coding index76.052.1
Independent measurements behind it53
Cost per solved taskNot computable$0.35
SourceOpenRouter listingOpenRouter listing

Questions

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

Pick GPT-6 Sol for coding: it scores 76.0 on the Vibe Coding Index against 52.1 for Kimi K2.6. Pick Kimi K2.6 for output tokens 2.5x cheaper ($4.00 vs $10.00 per million) and work measured by LMArena Text: coding or LMArena Text: software and IT, where it leads.

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

GPT-6 Sol costs $2.00 per million input tokens and $10.00 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-6 Sol or Kimi K2.6?

GPT-6 Sol, with 1.05M tokens against 262K.

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

80 benchmarks have a result for both models as of October 21, 2026. GPT-6 Sol'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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<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/gpt-6-sol-vs-kimi-k2-6">LLMBenchmark.ai, GPT-6 Sol vs Kimi K2.6</a></p>