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Grok 4.7 vs Kimi K3

Grok 4.7 leads Kimi K3 on coding, 66.7 to 62.3 on the Vibe Coding Index, and Grok 4.7 costs 2.5x less per output token ($6.00 vs $15.00 per million). Updated October 22, 2026; 88 benchmarks have a result for both.

Replace Grok 4.7 Replace Kimi K3
Grok 4.7xAI
Coding
66.7
Overall
66.6
Output $/M
$6.00
29
Kimi K3Moonshot AI
Coding
62.3
Overall
66.5
Output $/M
$15.00
59
vs boards won of 88 shared

Grok 4.7 or Kimi K3: which to pick

Pick Grok 4.7 for coding: it scores 66.7 on the Vibe Coding Index against 62.3 for Kimi K3, though on 5 benchmarks against 6.

Pick Kimi K3 for a larger context window (1.05M against 500K tokens) and work measured by LMArena WebDev or ProgramBench (Vals AI), where it leads.

Model AGrok 4.7xAI66.7/1005 independent benchmarksNo cost per solved taskModel BKimi K3Moonshot AI62.3/1006 independent benchmarks$0.81 per solved task
Shared results
88
Grok 4.7 only
11
Kimi K3 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
Grok 4.7 66.7 from 5 benchmarks, Kimi K3 62.3 from 6 benchmarks.
Widest category
Math, 21.4 points apart on average over 6 shared benchmarks.
Widest single gap
ProofBench: Grok 4.7 26.0% against Kimi K3 87.0%, 61.0 points apart on a 0 to 100 scale.
Output price
Grok 4.7 $6.00 against Kimi K3 $15.00 per million output tokens, 2.5x apart.
Context window
Grok 4.7 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 4.7BarsKimi K3Ties
Coding810
Intelligence11
Agentic work102
Reasoning37
Math15
Knowledge25
Web design16
General323
All shared boards2959
CodingLike-for-likeSix of these boards feed the Vibe Coding Index810
Coding benchmarks for Grok 4.7 and Kimi K3
BenchmarkGrok 4.7Kimi K3Leader
LiveBench coding84.5%59.3%Grok 4.7
LMArena WebDev16371655Kimi K3
AA Coding IndexNot measured76.2Only Kimi K3 measured
LiveCodeBench (Vals AI)Not measured87.2%Only Kimi K3 measured
SWE-bench Verified (Vals AI)Not measured93.4%Only Kimi K3 measured
Terminal-Bench 4 (Vals AI)28.8%17.2%Grok 4.7
Vibe Code Bench (Vals AI)86.2%85.0%Grok 4.7
Code migration (Vals AI)44.8%16.1%Grok 4.7
ProgramBench (Vals AI)0.5%2.0%Kimi K3
IOI (Vals AI)57.7%48.9%Grok 4.7
Terminal-Bench 2.1 (Vals AI)73.4%80.9%Kimi K3
SWE-bench Multimodal (Vals AI)42.9%44.2%Kimi K3
Vibe Code Bench 1-100 (Vals AI)Not measured18.2%Only Kimi K3 measured
CyberBench (Vals AI)69.5%75.2%Kimi K3
SciCode57.8%59.5%Kimi K3
FrontierCode47.6%44.2%Grok 4.7
FrontierSWE29.5%25.9%Grok 4.7
WeirdMLNot measured82.6%Only Kimi K3 measured
ALE-BenchNot measured1524.5Only Kimi K3 measured
LMArena Text: coding14321508Kimi K3
LMArena Text: software and IT14211499Kimi K3
LMArena WebDev: React16631670Kimi K3
LMArena WebDev: HTML16271644Kimi K3
LMArena WebDev: from an image15861579Grok 4.7
Neither model has a result on the other 15 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index11
Intelligence benchmarks for Grok 4.7 and Kimi K3
BenchmarkGrok 4.7Kimi K3Leader
AA Intelligence Index46.443.6Grok 4.7
Epoch Capabilities Index154.4157.9Kimi K3
Agentic workLike-for-likePublic boards, shown as published, kept out of the index102
Agentic work benchmarks for Grok 4.7 and Kimi K3
BenchmarkGrok 4.7Kimi K3Leader
AA Agentic IndexNot measured50.0Only Kimi K3 measured
Design Arena: agents building web appsNot measured1295Only Kimi K3 measured
Design Arena: agents building full-stack appsNot measured1315Only Kimi K3 measured
Design Arena: agents building mobile appsNot measured1269Only Kimi K3 measured
Design Arena: agents building Android appsNot measured1253Only Kimi K3 measured
Design Arena: agents building Godot gamesNot measured1223Only Kimi K3 measured
Design Arena: agents building gamesNot measured1252Only Kimi K3 measured
Design Arena: HTML slidesNot measured1206Only Kimi K3 measured
Design Arena: PowerPoint slidesNot measured1247Only Kimi K3 measured
Design Arena: spreadsheetsNot measured1070Only Kimi K3 measured
LiveBench research86.4%79.0%Grok 4.7
LiveBench browser60.0%16.0%Grok 4.7
LiveBench long agentic50.1%42.8%Grok 4.7
SREBench (Vals AI)3.8%Not measuredOnly Grok 4.7 measured
Finance Agent (Vals AI)52.3%53.1%Kimi K3
Tax Agent Bench (Vals AI)34.2%33.4%Grok 4.7
Legal Research Bench (Vals AI)47.1%46.1%Grok 4.7
Harvey's Legal Agent Benchmark (Vals AI)18.3%12.9%Grok 4.7
Excel Modeling Benchmark (Vals AI)67.0%66.7%Grok 4.7
BioMysteryBench (Vals AI)69.3%72.6%Kimi K3
Terminal-Bench-Science (Vals AI)10.0%1.4%Grok 4.7
Vals Science Index34.8%Not measuredOnly Grok 4.7 measured
Time Horizon Index (Vals AI)Not measured10.5%Only Kimi K3 measured
Robo-bench (Vals AI)0.2%Not measuredOnly Grok 4.7 measured
APEX-Agents54.6%47.8%Grok 4.7
PostTrainBenchNot measured32.0%Only Kimi K3 measured
Vending-Bench 2$10,537$5,165Grok 4.7
Neither model has a result on the other 14 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index37
Reasoning benchmarks for Grok 4.7 and Kimi K3
BenchmarkGrok 4.7Kimi K3Leader
GPQA DiamondNot measured92.9%Only Kimi K3 measured
LiveBench reasoning82.7%90.7%Kimi K3
MysteryMechanism (Vals AI)25.2%Not measuredOnly Grok 4.7 measured
MMMU Pro (Vals AI)Not measured88.2%Only Kimi K3 measured
GPQA Diamond (Artificial Analysis run)Not measured93.5%Only Kimi K3 measured
Humanity's Last Exam (Artificial Analysis run)43.1%46.9%Kimi K3
GPQA Diamond (Epoch AI run)92.7%93.1%Kimi K3
ARC-AGI90.2%94.5%Kimi K3
ARC-AGI-261.4%60.4%Grok 4.7
SimpleBenchNot measured60.7%Only Kimi K3 measured
Chess puzzles41.0%37.0%Grok 4.7
Mystery game puzzles29.0%26.0%Grok 4.7
LMArena Text: hard prompts14151495Kimi K3
LMArena Text: expert14391520Kimi K3
LMArena Text: hard prompts in English14271496Kimi K3
LMArena Vision: diagrams1254Not measuredOnly Grok 4.7 measured
LMArena Vision: homework1309Not measuredOnly Grok 4.7 measured
Neither model has a result on the other 5 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index15
Math benchmarks for Grok 4.7 and Kimi K3
BenchmarkGrok 4.7Kimi K3Leader
OTIS Mock AIME98.1%97.2%Grok 4.7
FrontierMath, tiers 1 to 353.0%72.2%Kimi K3
FrontierMath, tier 417.1%39.0%Kimi K3
ProofBench26.0%87.0%Kimi K3
LMArena Text: math14141494Kimi K3
LMArena Text: mathematical work14351505Kimi K3
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index25
Knowledge benchmarks for Grok 4.7 and Kimi K3
BenchmarkGrok 4.7Kimi K3Leader
MMLU ProNot measured88.0%Only Kimi K3 measured
LegalBench (Vals AI)84.4%86.2%Kimi K3
CorpFin (Vals AI)Not measured71.6%Only Kimi K3 measured
TaxEval (Vals AI)Not measured75.7%Only Kimi K3 measured
MortgageTax (Vals AI)Not measured66.3%Only Kimi K3 measured
MedCode (Vals AI)49.5%49.4%Grok 4.7
SimpleQA Verified56.0%50.6%Grok 4.7
LMArena Text: science14191508Kimi K3
LMArena Text: medicine and healthcare13951489Kimi K3
LMArena Text: legal and government14231503Kimi K3
LMArena Text: business and finance13891470Kimi K3
Neither model has a result on the other 7 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index16
Web design benchmarks for Grok 4.7 and Kimi K3
BenchmarkGrok 4.7Kimi K3Leader
Design Arena: websites12551334Kimi K3
Design Arena: UI components12751341Kimi K3
Design Arena: game dev13141358Kimi K3
Design Arena: data viz12381351Kimi K3
Design Arena: 3D12741387Kimi K3
Design Arena: all code categories12731360Kimi K3
Design Arena: SVGNot measured1302Only Kimi K3 measured
LiveBench design78.0%77.2%Grok 4.7
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index323
General benchmarks for Grok 4.7 and Kimi K3
BenchmarkGrok 4.7Kimi K3Leader
Vals Index58.6%53.0%Grok 4.7
LiveBench data analysis76.9%78.7%Kimi K3
Public Benefits Bench (Vals AI)65.6%68.2%Kimi K3
SAGE (Vals AI)40.8%52.8%Kimi K3
MedScribe (Vals AI)89.4%88.0%Grok 4.7
Vals Multimodal IndexNot measured73.4%Only Kimi K3 measured
Long context reasoning (AA-LCR)80.0%88.7%Kimi K3
DTBench96.0%91.2%Grok 4.7
LMCA49.4%52.7%Kimi K3
Surface Evolver BenchNot measured95.0%Only Kimi K3 measured
Furniture assembly20.8%34.2%Kimi K3
LMArena Text13991476Kimi K3
LMArena Text: instruction following14061485Kimi K3
LMArena Text: creative writing13811457Kimi K3
LMArena Vision1231Not measuredOnly Grok 4.7 measured
LMArena Text: English14111481Kimi K3
LMArena Text: non-English13861466Kimi K3
LMArena Text: Chinese14491529Kimi K3
LMArena Text: German13661490Kimi K3
LMArena Text: Japanese13591494Kimi K3
LMArena Text: Korean13831460Kimi K3
LMArena Text: French14311492Kimi K3
LMArena Text: Spanish14061472Kimi K3
LMArena Text: Russian13991485Kimi K3
LMArena Text: Polish14201458Kimi K3
LMArena Text: multi-turn13941489Kimi K3
LMArena Text: longer queries14161494Kimi K3
LMArena Text: writing and language13941471Kimi K3
LMArena Text: entertainment and media13761453Kimi K3
LMArena Vision: English1229Not measuredOnly Grok 4.7 measured
LMArena Vision: Chinese1250Not measuredOnly Grok 4.7 measured
LMArena Vision: reading text1241Not measuredOnly Grok 4.7 measured
LMArena Vision: creative writing1217Not measuredOnly Grok 4.7 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 Grok 4.7 and Kimi K3
BenchmarkGrok 4.7Kimi 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 4.7$0.0050Fits in one request
Kimi K3$0.011Fits in one request

Grok 4.7 costs less

Repository review

50K input + 3K output tokens

Grok 4.7$0.118Fits in one request
Kimi K3$0.195Fits in one request

Grok 4.7 costs less

Agent loop

200K input + 10K output tokens

Grok 4.7$0.460Fits in one request
Kimi K3$0.750Fits in one request

Grok 4.7 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 4.7 and Kimi K3
SpecificationSpaceXAI Grok 4.7MoonshotAI Kimi K3
MakerxAIMoonshot AI
WeightsNo public weights listedOpen weights
ReleasedSeptember 21, 2026July 16, 2026
Context window500K1.05M
Input $/Mtok$2.00$3.00
Output $/Mtok$6.00$15.00
Coding index66.762.3
Independent measurements behind it56
Cost per solved taskNot computable$0.81
SourceOpenRouter listingOpenRouter listing

Questions

Is Grok 4.7 better than Kimi K3 for coding?

Pick Grok 4.7 for coding: it scores 66.7 on the Vibe Coding Index against 62.3 for Kimi K3, though on 5 benchmarks against 6. Pick Kimi K3 for a larger context window (1.05M against 500K tokens) and work measured by LMArena WebDev or ProgramBench (Vals AI), where it leads.

Which is cheaper, Grok 4.7 or Kimi K3?

Grok 4.7 costs $2.00 per million input tokens and $6.00 per million output tokens; Kimi K3 costs $3.00 and $15.00. Cost per solved task is known for Kimi K3 only.

Which has the bigger context window, Grok 4.7 or Kimi K3?

Kimi K3, with 1.05M tokens against 500K.

How many benchmarks is the Grok 4.7 vs Kimi K3 comparison based on?

88 benchmarks have a result for both models as of October 22, 2026. Grok 4.7's coding index rests on 5 independent benchmarks and Kimi K3's on 6. 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/grok-4-7-vs-kimi-k3">LLMBenchmark.ai, Grok 4.7 vs Kimi K3</a></p>