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Grok 4.6 vs Kimi K3

Updated October 21, 2026. 109 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Grok 4.6 Replace Kimi K3
Grok 4.6xAI
Coding
76.4
Overall
44.3
Output $/M
$6.00
31
Kimi K3Moonshot AI
Coding
61.8
Overall
43.6
Output $/M
$11.936
77
vs boards won of 109 shared, 1 tied

Decision reading

Pick Grok 4.6 for coding: it scores 76.4 on the Vibe Coding Index against 61.8 for Kimi K3.

Pick Kimi K3 when a solved task costs $0.81 against $0.82, or when the context window is larger, 1.05M against 500K tokens.

Model AGrok 4.6xAI76.4/1002 independent benchmarks$0.82 per solved taskModel BKimi K3Moonshot AI61.8/1002 independent benchmarks$0.81 per solved task
Shared results
109
Grok 4.6 only
14
Kimi K3 only
8
Like-for-like categories
8 of 9

Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.

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
Grok 4.6 76.4 from 2 benchmarks, Kimi K3 61.8 from 2 benchmarks.
Widest category
Math, 11.9 points apart on average over 6 shared benchmarks.
Widest single gap
LiveBench browser: Grok 4.6 64.0% against Kimi K3 16.0%, 48.0 points apart on a 0 to 100 scale.
Output price
Grok 4.6 $6.00 against Kimi K3 $11.936 per million output tokens, 2.0x apart.
Context window
Grok 4.6 takes 500K tokens, Kimi K3 1.05M.

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
CategoryGrok 4.6BarsKimi K3Ties
Coding7151 tie
Intelligence11
Agentic work1011
Reasoning76
Math15
Knowledge29
Web design17
General223
All shared boards31771 tie
CodingLike-for-likeFour of these boards feed the Vibe Coding Index715
Coding benchmarks for Grok 4.6 and Kimi K3
BenchmarkGrok 4.6Kimi K3Leader
LiveBench coding89.1%59.3%Grok 4.6
LMArena WebDev16171655Kimi K3
AA Coding Index76.876.2Grok 4.6
LiveCodeBench (Vals AI)88.2%87.2%Grok 4.6
SWE-bench Verified (Vals AI)95.6%93.4%Grok 4.6
Terminal-Bench 4 (Vals AI)17.2%17.2%Tie
Vibe Code Bench (Vals AI)76.2%85.0%Kimi K3
Code migration (Vals AI)44.6%16.1%Grok 4.6
ProgramBench (Vals AI)1.0%2.0%Kimi K3
IOI (Vals AI)47.6%48.9%Kimi K3
Terminal-Bench 2.1 (Vals AI)78.3%80.9%Kimi K3
SWE-bench Multimodal (Vals AI)Not measured44.2%Only Kimi K3 measured
Vibe Code Bench 1-100 (Vals AI)14.8%18.2%Kimi K3
SkillsBench (Vals AI)55.8%Not measuredOnly Grok 4.6 measured
CyberBench (Vals AI)67.7%75.2%Kimi K3
SciCode56.5%59.5%Kimi K3
FrontierCode48.0%44.2%Grok 4.6
FrontierSWE25.3%25.9%Kimi K3
WeirdML67.3%82.6%Kimi K3
ALE-Bench1508.11524.5Kimi K3
LMArena Text: coding14661508Kimi K3
LMArena Text: software and IT14571499Kimi K3
LMArena WebDev: React16311670Kimi K3
LMArena WebDev: HTML15971644Kimi K3
LMArena WebDev: from an image16031579Grok 4.6
Neither model has a result on the other 13 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index11
Intelligence benchmarks for Grok 4.6 and Kimi K3
BenchmarkGrok 4.6Kimi K3Leader
AA Intelligence Index44.343.6Grok 4.6
Epoch Capabilities Index156.6157.9Kimi K3
Agentic workLike-for-likePublic boards, shown as published, kept out of the index1011
Agentic work benchmarks for Grok 4.6 and Kimi K3
BenchmarkGrok 4.6Kimi K3Leader
AA Agentic Index53.050.0Grok 4.6
Design Arena: agents building web apps12471296Kimi K3
Design Arena: agents building full-stack apps12641315Kimi K3
Design Arena: agents building mobile apps12341267Kimi K3
Design Arena: agents building Android apps12971256Grok 4.6
Design Arena: agents building Godot games12761223Grok 4.6
Design Arena: agents building games12081252Kimi K3
Design Arena: HTML slides12491256Kimi K3
Design Arena: PowerPoint slides12411273Kimi K3
Design Arena: spreadsheetsNot measured1058Only Kimi K3 measured
LiveBench research84.5%79.0%Grok 4.6
LiveBench browser64.0%16.0%Grok 4.6
LiveBench long agentic40.7%42.8%Kimi K3
Finance Agent (Vals AI)53.7%53.1%Grok 4.6
Tax Agent Bench (Vals AI)33.1%33.4%Kimi K3
Legal Research Bench (Vals AI)48.1%46.1%Grok 4.6
Harvey's Legal Agent Benchmark (Vals AI)Not measured12.9%Only Kimi K3 measured
Excel Modeling Benchmark (Vals AI)62.7%66.7%Kimi K3
BioMysteryBench (Vals AI)72.2%72.6%Kimi K3
Terminal-Bench-Science (Vals AI)11.4%1.4%Grok 4.6
Vals Science Index38.1%Not measuredOnly Grok 4.6 measured
Time Horizon Index (Vals AI)5.8%10.5%Kimi K3
APEX-Agents65.3%47.8%Grok 4.6
PostTrainBenchNot measured32.0%Only Kimi K3 measured
Vending-Bench 2$9,047$5,165Grok 4.6
Neither model has a result on the other 14 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index76
Reasoning benchmarks for Grok 4.6 and Kimi K3
BenchmarkGrok 4.6Kimi K3Leader
GPQA Diamond94.7%92.9%Grok 4.6
LiveBench reasoning91.2%90.7%Grok 4.6
MysteryMechanism (Vals AI)30.6%Not measuredOnly Grok 4.6 measured
MMMU Pro (Vals AI)Not measured88.2%Only Kimi K3 measured
GPQA Diamond (Artificial Analysis run)94.9%93.5%Grok 4.6
Humanity's Last Exam (Artificial Analysis run)44.1%46.9%Kimi K3
GPQA Diamond (Epoch AI run)94.0%93.1%Grok 4.6
ARC-AGI87.5%94.5%Kimi K3
ARC-AGI-267.1%60.4%Grok 4.6
SimpleBench75.9%60.7%Grok 4.6
Chess puzzles33.0%37.0%Kimi K3
Mystery game puzzles34.0%26.0%Grok 4.6
EBR-bench30.5%Not measuredOnly Grok 4.6 measured
LMArena Text: hard prompts14481495Kimi K3
LMArena Text: expert14691520Kimi K3
LMArena Text: hard prompts in English14451496Kimi K3
LMArena Vision: diagrams1285Not measuredOnly Grok 4.6 measured
LMArena Vision: homework1283Not measuredOnly Grok 4.6 measured
Neither model has a result on the other 3 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index15
Math benchmarks for Grok 4.6 and Kimi K3
BenchmarkGrok 4.6Kimi K3Leader
OTIS Mock AIME99.2%97.2%Grok 4.6
FrontierMath, tiers 1 to 366.0%72.2%Kimi K3
FrontierMath, tier 431.7%39.0%Kimi K3
ProofBench51.0%87.0%Kimi K3
LMArena Text: math14171494Kimi K3
LMArena Text: mathematical work14641505Kimi K3
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index29
Knowledge benchmarks for Grok 4.6 and Kimi K3
BenchmarkGrok 4.6Kimi K3Leader
MMLU Pro89.4%88.0%Grok 4.6
LegalBench (Vals AI)86.3%86.2%Grok 4.6
CorpFin (Vals AI)66.2%71.6%Kimi K3
TaxEval (Vals AI)71.1%75.7%Kimi K3
MortgageTax (Vals AI)64.2%66.3%Kimi K3
MedCode (Vals AI)44.7%49.4%Kimi K3
SimpleQA Verified49.3%50.6%Kimi K3
LMArena Text: science14371508Kimi K3
LMArena Text: medicine and healthcare14201489Kimi K3
LMArena Text: legal and government14291503Kimi K3
LMArena Text: business and finance14161470Kimi K3
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index17
Web design benchmarks for Grok 4.6 and Kimi K3
BenchmarkGrok 4.6Kimi K3Leader
Design Arena: websites12891336Kimi K3
Design Arena: UI components12941345Kimi K3
Design Arena: game dev12961361Kimi K3
Design Arena: data viz12831350Kimi K3
Design Arena: 3D12771388Kimi K3
Design Arena: all code categories12921361Kimi K3
Design Arena: SVG12391301Kimi K3
Design Arena: ASCII art1278Not measuredOnly Grok 4.6 measured
LiveBench design79.8%77.2%Grok 4.6
GeneralLike-for-likePublic boards, shown as published, kept out of the index223
General benchmarks for Grok 4.6 and Kimi K3
BenchmarkGrok 4.6Kimi K3Leader
Vals IndexNot measured53.0%Only Kimi K3 measured
LiveBench data analysis75.3%78.7%Kimi K3
Public Benefits Bench (Vals AI)66.8%68.2%Kimi K3
SAGE (Vals AI)28.9%52.8%Kimi K3
MedScribe (Vals AI)86.5%88.0%Kimi K3
Vals Multimodal IndexNot measured73.4%Only Kimi K3 measured
Long context reasoning (AA-LCR)81.0%88.7%Kimi K3
DTBench97.3%91.2%Grok 4.6
LMCA48.5%52.7%Kimi K3
Surface Evolver BenchNot measured95.0%Only Kimi K3 measured
Furniture assembly40.0%34.2%Grok 4.6
LMArena Text14291476Kimi K3
LMArena Text: instruction following14311485Kimi K3
LMArena Text: creative writing14261457Kimi K3
LMArena Vision1263Not measuredOnly Grok 4.6 measured
LMArena Text: English14331481Kimi K3
LMArena Text: non-English14201466Kimi K3
LMArena Text: Chinese14761529Kimi K3
LMArena Text: German14261490Kimi K3
LMArena Text: Japanese13781494Kimi K3
LMArena Text: Korean13911460Kimi K3
LMArena Text: French14551492Kimi K3
LMArena Text: Spanish14141472Kimi K3
LMArena Text: Russian14211485Kimi K3
LMArena Text: Polish14301458Kimi K3
LMArena Text: multi-turn14251489Kimi K3
LMArena Text: longer queries14561494Kimi K3
LMArena Text: writing and language14291471Kimi K3
LMArena Text: entertainment and media14211453Kimi K3
LMArena Vision: English1270Not measuredOnly Grok 4.6 measured
LMArena Vision: Chinese1289Not measuredOnly Grok 4.6 measured
LMArena Vision: reading text1272Not measuredOnly Grok 4.6 measured
LMArena Vision: humor1270Not measuredOnly Grok 4.6 measured
LMArena Vision: creative writing1262Not measuredOnly Grok 4.6 measured
LMArena Document1452Not measuredOnly Grok 4.6 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 Grok 4.6 and Kimi K3
BenchmarkGrok 4.6Kimi K3Leader
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

Grok 4.6$0.0050Fits in one request
Kimi K3$0.0062Fits in one request

Grok 4.6 costs less

Repository review

50K input + 3K output tokens

Grok 4.6$0.118Fits in one request
Kimi K3$0.048Fits in one request

Kimi K3 costs less

Agent loop

200K input + 10K output tokens

Grok 4.6$0.460Fits in one request
Kimi K3$0.167Fits in one request

Kimi K3 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 Grok 4.6 and Kimi K3
SpecificationSpaceXAI Grok 4.6MoonshotAI Kimi K3
MakerxAIMoonshot AI
WeightsNo public weights listedOpen weights
ReleasedAugust 12, 2026July 16, 2026
Context window500K1.05M
Input $/Mtok$2.00$0.239
Output $/Mtok$6.00$11.936
Coding index76.461.8
Independent measurements behind it22
Cost per solved task$0.82$0.81
SourceOpenRouter listingOpenRouter listing

Questions

Is Grok 4.6 better than Kimi K3 for coding?

Pick Grok 4.6 for coding: it scores 76.4 on the Vibe Coding Index against 61.8 for Kimi K3. Pick Kimi K3 when a solved task costs $0.81 against $0.82, or when the context window is larger, 1.05M against 500K tokens.

Which is cheaper, Grok 4.6 or Kimi K3?

Grok 4.6 costs $2.00 per million input tokens and $6.00 per million output tokens; Kimi K3 costs $0.239 and $11.936. Per solved SWE-bench Verified task, Grok 4.6 costs $0.82 and Kimi K3 $0.81.

Which has the bigger context window, Grok 4.6 or Kimi K3?

Kimi K3, with 1.05M tokens against 500K.

How many benchmarks is the Grok 4.6 vs Kimi K3 comparison based on?

109 benchmarks have a result for both models as of October 21, 2026. Grok 4.6's coding index rests on 2 independent benchmarks and Kimi K3's on 2. Where only one model has a result, the page says so instead of naming a winner.

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