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Grok 4.6 vs Kimi K2.5

Grok 4.6 leads Kimi K2.5 on coding, 65.7 to 38.6 on the Vibe Coding Index, and Kimi K2.5 costs 2.1x less per output token ($2.85 vs $6.00 per million). Updated October 22, 2026; 82 benchmarks have a result for both.

Replace Grok 4.6 Replace Kimi K2.5
Grok 4.6xAI
Coding
65.7
Overall
67.4
Output $/M
$6.00
50
Kimi K2.5Moonshot AI
Coding
38.6
Overall
44.8
Output $/M
$2.85
32
vs boards won of 82 shared

Grok 4.6 or Kimi K2.5: which to pick

Pick Grok 4.6 for coding: it scores 65.7 on the Vibe Coding Index against 38.6 for Kimi K2.5.

Pick Kimi K2.5 for output tokens 2.1x cheaper ($2.85 vs $6.00 per million) and a lower cost per solved task ($0.24 against $0.82).

Model AGrok 4.6xAI65.7/1006 independent benchmarks$0.82 per solved taskModel BKimi K2.5Moonshot AI38.6/1003 independent benchmarks$0.24 per solved task
Shared results
82
Grok 4.6 only
41
Kimi K2.5 only
17
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 4.6 65.7 from 6 benchmarks, Kimi K2.5 38.6 from 3 benchmarks.
Widest category
Coding, 25.1 points apart on average over 14 shared benchmarks.
Widest single gap
Vibe Code Bench (Vals AI): Grok 4.6 76.2% against Kimi K2.5 17.5%, 58.7 points apart on a 0 to 100 scale.
Output price
Grok 4.6 $6.00 against Kimi K2.5 $2.85 per million output tokens, 2.1x apart.
Context window
Grok 4.6 takes 500K tokens, Kimi K2.5 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
CategoryGrok 4.6BarsKimi K2.5Ties
Coding122
Intelligence20
Agentic work90
Reasoning83
Math02
Knowledge37
Web design80
General818
All shared boards5032
CodingLike-for-likeSix of these boards feed the Vibe Coding Index122
Coding benchmarks for Grok 4.6 and Kimi K2.5
BenchmarkGrok 4.6Kimi K2.5Leader
SWE-bench VerifiedNot measured70.8%Only Kimi K2.5 measured
SWE-bench MultilingualNot measured67.3%Only Kimi K2.5 measured
LiveBench coding89.1%Not measuredOnly Grok 4.6 measured
LMArena WebDev16171437Grok 4.6
AA Coding Index76.846.8Grok 4.6
LiveCodeBench (Vals AI)88.2%83.9%Grok 4.6
SWE-bench Verified (Vals AI)95.6%70.0%Grok 4.6
Terminal-Bench 4 (Vals AI)17.2%Not measuredOnly Grok 4.6 measured
Vibe Code Bench (Vals AI)76.2%17.5%Grok 4.6
Code migration (Vals AI)44.6%7.0%Grok 4.6
ProgramBench (Vals AI)1.0%Not measuredOnly Grok 4.6 measured
IOI (Vals AI)47.6%Not measuredOnly Grok 4.6 measured
Terminal-Bench 2.1 (Vals AI)78.3%42.0%Grok 4.6
Vibe Code Bench 1-100 (Vals AI)14.8%Not measuredOnly Grok 4.6 measured
SkillsBench (Vals AI)55.8%Not measuredOnly Grok 4.6 measured
CyberBench (Vals AI)67.7%Not measuredOnly Grok 4.6 measured
SciCode56.5%Not measuredOnly Grok 4.6 measured
Terminal-Bench Hard (Artificial Analysis run)Not measured34.8%Only Kimi K2.5 measured
Terminal-BenchNot measured43.2%Only Kimi K2.5 measured
FrontierCode48.0%Not measuredOnly Grok 4.6 measured
FrontierSWE25.3%Not measuredOnly Grok 4.6 measured
WeirdML67.3%45.6%Grok 4.6
ALE-Bench1508.1821.6Grok 4.6
LMArena Text: coding14661483Kimi K2.5
LMArena Text: software and IT14571471Kimi K2.5
LMArena WebDev: React16311429Grok 4.6
LMArena WebDev: HTML15971426Grok 4.6
LMArena WebDev: from an image16031439Grok 4.6
Neither model has a result on the other 11 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Grok 4.6 and Kimi K2.5
BenchmarkGrok 4.6Kimi K2.5Leader
AA Intelligence Index44.323.5Grok 4.6
Epoch Capabilities Index156.6148.1Grok 4.6
Agentic workLike-for-likePublic boards, shown as published, kept out of the index90
Agentic work benchmarks for Grok 4.6 and Kimi K2.5
BenchmarkGrok 4.6Kimi K2.5Leader
AA Agentic Index53.0Not measuredOnly Grok 4.6 measured
Design Arena: agents building web apps12481136Grok 4.6
Design Arena: agents building full-stack apps12641114Grok 4.6
Design Arena: agents building mobile apps12341147Grok 4.6
Design Arena: agents building Android apps12911118Grok 4.6
Design Arena: agents building Godot games12761219Grok 4.6
Design Arena: agents building games1209Not measuredOnly Grok 4.6 measured
Design Arena: HTML slides1250Not measuredOnly Grok 4.6 measured
Design Arena: PowerPoint slides1237Not measuredOnly Grok 4.6 measured
LiveBench research84.5%Not measuredOnly Grok 4.6 measured
LiveBench browser64.0%Not measuredOnly Grok 4.6 measured
LiveBench long agentic40.7%Not measuredOnly Grok 4.6 measured
Finance Agent (Vals AI)53.7%35.8%Grok 4.6
Tax Agent Bench (Vals AI)33.1%Not measuredOnly Grok 4.6 measured
Legal Research Bench (Vals AI)48.1%15.9%Grok 4.6
Excel Modeling Benchmark (Vals AI)62.7%28.5%Grok 4.6
BioMysteryBench (Vals AI)72.2%Not measuredOnly Grok 4.6 measured
Terminal-Bench-Science (Vals AI)11.4%Not measuredOnly Grok 4.6 measured
Vals Science Index38.1%Not measuredOnly Grok 4.6 measured
Time Horizon Index (Vals AI)5.8%Not measuredOnly Grok 4.6 measured
τ²-Bench TelecomNot measured95.9%Only Kimi K2.5 measured
APEX-Agents65.3%Not measuredOnly Grok 4.6 measured
OSWorldNot measured63.3%Only Kimi K2.5 measured
Vending-Bench 2$9,047$1,198Grok 4.6
Neither model has a result on the other 17 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index83
Reasoning benchmarks for Grok 4.6 and Kimi K2.5
BenchmarkGrok 4.6Kimi K2.5Leader
GPQA Diamond94.7%84.1%Grok 4.6
LiveBench reasoning91.2%Not measuredOnly Grok 4.6 measured
MysteryMechanism (Vals AI)30.6%Not measuredOnly Grok 4.6 measured
MMMU Pro (Vals AI)Not measured84.3%Only Kimi K2.5 measured
GPQA Diamond (Artificial Analysis run)94.9%87.9%Grok 4.6
Humanity's Last Exam (Artificial Analysis run)44.1%30.7%Grok 4.6
GPQA Diamond (Epoch AI run)94.0%Not measuredOnly Grok 4.6 measured
ARC-AGI87.5%65.3%Grok 4.6
ARC-AGI-267.1%11.8%Grok 4.6
SimpleBench75.9%46.8%Grok 4.6
Chess puzzles33.0%Not measuredOnly Grok 4.6 measured
Mystery game puzzles34.0%Not measuredOnly Grok 4.6 measured
EBR-bench30.5%Not measuredOnly Grok 4.6 measured
LMArena Text: hard prompts14481453Kimi K2.5
LMArena Text: expert14691466Grok 4.6
LMArena Text: hard prompts in English14451460Kimi K2.5
LMArena Vision: diagrams12851282Grok 4.6
LMArena Vision: homework12831297Kimi K2.5
Kagi LLM BenchmarkNot measured78.5%Only Kimi K2.5 measured
Neither model has a result on the other 3 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index02
Math benchmarks for Grok 4.6 and Kimi K2.5
BenchmarkGrok 4.6Kimi K2.5Leader
AIMENot measured95.6%Only Kimi K2.5 measured
OTIS Mock AIME99.2%Not measuredOnly Grok 4.6 measured
FrontierMath, tiers 1 to 366.0%Not measuredOnly Grok 4.6 measured
FrontierMath, tier 431.7%Not measuredOnly Grok 4.6 measured
ProofBench51.0%Not measuredOnly Grok 4.6 measured
LMArena Text: math14171470Kimi K2.5
LMArena Text: mathematical work14641473Kimi K2.5
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index37
Knowledge benchmarks for Grok 4.6 and Kimi K2.5
BenchmarkGrok 4.6Kimi K2.5Leader
MMLU Pro89.4%85.9%Grok 4.6
LegalBench (Vals AI)86.3%Not measuredOnly Grok 4.6 measured
CaseLaw (Vals AI)Not measured58.7%Only Kimi K2.5 measured
CorpFin (Vals AI)66.2%68.3%Kimi K2.5
TaxEval (Vals AI)71.1%74.2%Kimi K2.5
MortgageTax (Vals AI)64.2%66.5%Kimi K2.5
MedQA (Vals AI)Not measured94.4%Only Kimi K2.5 measured
MedCode (Vals AI)44.7%39.3%Grok 4.6
SimpleQA Verified49.3%34.3%Grok 4.6
LMArena Text: science14371459Kimi K2.5
LMArena Text: medicine and healthcare14201448Kimi K2.5
LMArena Text: legal and government14291441Kimi K2.5
LMArena Text: business and finance14161427Kimi K2.5
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 Grok 4.6 and Kimi K2.5
BenchmarkGrok 4.6Kimi K2.5Leader
Design Arena: websites12891248Grok 4.6
Design Arena: UI components12941234Grok 4.6
Design Arena: game dev12961206Grok 4.6
Design Arena: data viz12821219Grok 4.6
Design Arena: 3D12771204Grok 4.6
Design Arena: all code categories12921236Grok 4.6
Design Arena: SVG12401149Grok 4.6
Design Arena: ASCII art12791166Grok 4.6
LiveBench design79.8%Not measuredOnly Grok 4.6 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index818
General benchmarks for Grok 4.6 and Kimi K2.5
BenchmarkGrok 4.6Kimi K2.5Leader
LiveBench data analysis75.3%Not measuredOnly Grok 4.6 measured
Public Benefits Bench (Vals AI)66.8%Not measuredOnly Grok 4.6 measured
SAGE (Vals AI)28.9%49.9%Kimi K2.5
MedScribe (Vals AI)86.5%76.4%Grok 4.6
IFBenchNot measured70.2%Only Kimi K2.5 measured
Long context reasoning (AA-LCR)81.0%78.0%Grok 4.6
DTBench97.3%Not measuredOnly Grok 4.6 measured
LMCA48.5%Not measuredOnly Grok 4.6 measured
Fiction.LiveBenchNot measured86.1%Only Kimi K2.5 measured
CL-benchNot measured19.3%Only Kimi K2.5 measured
Furniture assembly40.0%Not measuredOnly Grok 4.6 measured
CL-bench LifeNot measured13.2%Only Kimi K2.5 measured
LMArena Text14291445Kimi K2.5
LMArena Text: instruction following14311431Grok 4.6
LMArena Text: creative writing14261422Grok 4.6
LMArena Vision12631269Kimi K2.5
LMArena Text: English14331453Kimi K2.5
LMArena Text: non-English14201433Kimi K2.5
LMArena Text: Chinese14761494Kimi K2.5
LMArena Text: German14261441Kimi K2.5
LMArena Text: Japanese13781423Kimi K2.5
LMArena Text: Korean13911412Kimi K2.5
LMArena Text: French14551454Grok 4.6
LMArena Text: Spanish14141450Kimi K2.5
LMArena Text: Russian14211435Kimi K2.5
LMArena Text: Polish14301445Kimi K2.5
LMArena Text: multi-turn14251444Kimi K2.5
LMArena Text: longer queries14561445Grok 4.6
LMArena Text: writing and language14291425Grok 4.6
LMArena Text: entertainment and media14211417Grok 4.6
LMArena Vision: English12701274Kimi K2.5
LMArena Vision: Chinese12891328Kimi K2.5
LMArena Vision: reading text12721276Kimi K2.5
LMArena Vision: humor12701284Kimi K2.5
LMArena Vision: captioningNot measured1257Only Kimi K2.5 measured
LMArena Vision: recognizing thingsNot measured1285Only Kimi K2.5 measured
LMArena Vision: creative writing12621269Kimi K2.5
LMArena Document1452Not measuredOnly Grok 4.6 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 Grok 4.6 and Kimi K2.5
BenchmarkGrok 4.6Kimi K2.5Leader
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 K2.5$0.0020Fits in one request

Kimi K2.5 costs less

Repository review

50K input + 3K output tokens

Grok 4.6$0.118Fits in one request
Kimi K2.5$0.035Fits in one request

Kimi K2.5 costs less

Agent loop

200K input + 10K output tokens

Grok 4.6$0.460Fits in one request
Kimi K2.5$0.135Fits in one request

Kimi K2.5 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 K2.5
SpecificationSpaceXAI Grok 4.6MoonshotAI Kimi K2.5
MakerxAIMoonshot AI
WeightsNo public weights listedOpen weights
ReleasedAugust 12, 2026January 27, 2026
Context window500K262K
Input $/Mtok$2.00$0.532
Output $/Mtok$6.00$2.85
Coding index65.738.6
Independent measurements behind it63
Cost per solved task$0.82$0.24
SourceOpenRouter listingOpenRouter listing

Questions

Is Grok 4.6 better than Kimi K2.5 for coding?

Pick Grok 4.6 for coding: it scores 65.7 on the Vibe Coding Index against 38.6 for Kimi K2.5. Pick Kimi K2.5 for output tokens 2.1x cheaper ($2.85 vs $6.00 per million) and a lower cost per solved task ($0.24 against $0.82).

Which is cheaper, Grok 4.6 or Kimi K2.5?

Grok 4.6 costs $2.00 per million input tokens and $6.00 per million output tokens; Kimi K2.5 costs $0.532 and $2.85. Per solved SWE-bench Verified task, Grok 4.6 costs $0.82 and Kimi K2.5 $0.24.

Which has the bigger context window, Grok 4.6 or Kimi K2.5?

Grok 4.6, with 500K tokens against 262K.

How many benchmarks is the Grok 4.6 vs Kimi K2.5 comparison based on?

82 benchmarks have a result for both models as of October 22, 2026. Grok 4.6's coding index rests on 6 independent benchmarks and Kimi K2.5's on 3. Where only one model has a result, the page says so instead of naming a winner.

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