Enter opens the highlighted result. Esc closes.

Kimi K3 vs Kimi K3.1 Pro

Kimi K3.1 Pro leads Kimi K3 on coding, 82.2 to 62.3 on the Vibe Coding Index, and Kimi K3.1 Pro costs 1.5x less per output token ($10.00 vs $15.00 per million). Updated October 29, 2026; 32 benchmarks have a result for both.

Replace Kimi K3 Replace Kimi K3.1 Pro
Kimi K3Moonshot AI
Coding
62.3
Overall
68.4
Output $/M
$15.00
9
Kimi K3.1 ProMoonshot AI
Coding
82.2
Overall
74.4
Output $/M
$10.00
23
vs boards won of 32 shared

Kimi K3 or Kimi K3.1 Pro: which to pick

Pick Kimi K3.1 Pro for coding: it scores 82.2 on the Vibe Coding Index against 62.3 for Kimi K3, though on 4 benchmarks against 6.

Pick Kimi K3 for work measured by Vibe Code Bench (Vals AI) or LiveBench research, where it leads.

Model AKimi K3Moonshot AI62.3/1006 independent benchmarks$0.81 per solved taskModel BKimi K3.1 ProMoonshot AI82.2/1004 independent benchmarksNo cost per solved task
Shared results
32
Kimi K3 only
89
Kimi K3.1 Pro only
3
Like-for-like categories
6 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
Kimi K3 62.3 from 6 benchmarks, Kimi K3.1 Pro 82.2 from 4 benchmarks.
Widest category
Coding, 15.3 points apart on average over 9 shared benchmarks.
Widest single gap
Terminal-Bench 4 (Vals AI): Kimi K3 17.2% against Kimi K3.1 Pro 63.6%, 62.0 points apart on a 0 to 100 scale.
Output price
Kimi K3 $15.00 against Kimi K3.1 Pro $10.00 per million output tokens, 1.5x apart.
Context window
Both take 1.05M tokens.

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
CategoryKimi K3BarsKimi K3.1 ProTies
Coding18
Agentic work44
Reasoning02
Math02
Web design35
General12
All shared boards923
CodingLike-for-likeSix of these boards feed the Vibe Coding Index18
Coding benchmarks for Kimi K3 and Kimi K3.1 Pro
BenchmarkKimi K3Kimi K3.1 ProLeader
LiveBench coding59.3%81.8%Kimi K3.1 Pro
LMArena WebDev16561695Kimi K3.1 Pro
AA Coding Index76.2Not measuredOnly Kimi K3 measured
LiveCodeBench (Vals AI)87.2%Not measuredOnly Kimi K3 measured
SWE-bench Verified (Vals AI)93.4%Not measuredOnly Kimi K3 measured
Terminal-Bench 4 (Vals AI)17.2%63.6%Kimi K3.1 Pro
Vibe Code Bench (Vals AI)85.0%84.9%Kimi K3
Code migration (Vals AI)16.1%Not measuredOnly Kimi K3 measured
ProgramBench (Vals AI)2.0%Not measuredOnly Kimi K3 measured
IOI (Vals AI)48.9%81.9%Kimi K3.1 Pro
Terminal-Bench 2.1 (Vals AI)80.9%Not measuredOnly Kimi K3 measured
SWE-bench Multimodal (Vals AI)44.2%Not measuredOnly Kimi K3 measured
Vibe Code Bench 1-100 (Vals AI)18.2%Not measuredOnly Kimi K3 measured
CyberBench (Vals AI)75.2%Not measuredOnly Kimi K3 measured
SciCode59.5%60.8%Kimi K3.1 Pro
FrontierCode44.2%Not measuredOnly Kimi K3 measured
FrontierSWE25.9%Not measuredOnly Kimi K3 measured
WeirdML82.6%Not measuredOnly Kimi K3 measured
ALE-Bench1524.51932.8Kimi K3.1 Pro
LMArena Text: coding1508Not measuredOnly Kimi K3 measured
LMArena Text: software and IT1499Not measuredOnly Kimi K3 measured
LMArena WebDev: React16721701Kimi K3.1 Pro
LMArena WebDev: HTML16411706Kimi K3.1 Pro
LMArena WebDev: from an image1579Not measuredOnly Kimi K3 measured
SWE-Bench Pro V297.7%Not measuredOnly Kimi K3 measured
Neither model has a result on the other 18 boards here
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index2 boards, none shared
Intelligence benchmarks for Kimi K3 and Kimi K3.1 Pro
BenchmarkKimi K3Kimi K3.1 ProLeader
AA Intelligence IndexNot measured46.0Only Kimi K3.1 Pro measured
Epoch Capabilities Index157.9Not measuredOnly Kimi K3 measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index44
Agentic work benchmarks for Kimi K3 and Kimi K3.1 Pro
BenchmarkKimi K3Kimi K3.1 ProLeader
AA Agentic Index50.0Not measuredOnly Kimi K3 measured
Design Arena: agents building web apps1296Not measuredOnly Kimi K3 measured
Design Arena: agents building full-stack apps1315Not measuredOnly Kimi K3 measured
Design Arena: agents building mobile apps1267Not measuredOnly Kimi K3 measured
Design Arena: agents building Android apps1255Not measuredOnly Kimi K3 measured
Design Arena: agents building Godot games1223Not measuredOnly Kimi K3 measured
Design Arena: agents building games1217Not measuredOnly Kimi K3 measured
Design Arena: HTML slides1153Not measuredOnly Kimi K3 measured
Design Arena: PowerPoint slides1219Not measuredOnly Kimi K3 measured
Design Arena: spreadsheets1114Not measuredOnly Kimi K3 measured
LiveBench research79.0%77.9%Kimi K3
LiveBench browser75.2%75.9%Kimi K3.1 Pro
LiveBench long agentic26.4%39.1%Kimi K3.1 Pro
Finance Agent (Vals AI)53.1%Not measuredOnly Kimi K3 measured
Tax Agent Bench (Vals AI)33.4%24.9%Kimi K3
Legal Research Bench (Vals AI)46.1%37.5%Kimi K3
Harvey's Legal Agent Benchmark (Vals AI)12.9%11.7%Kimi K3
Excel Modeling Benchmark (Vals AI)66.7%Not measuredOnly Kimi K3 measured
BioMysteryBench (Vals AI)72.6%75.6%Kimi K3.1 Pro
Terminal-Bench-Science (Vals AI)1.4%31.4%Kimi K3.1 Pro
Vals Science IndexNot measured44.4%Only Kimi K3.1 Pro measured
Time Horizon Index (Vals AI)10.5%Not measuredOnly Kimi K3 measured
APEX-Agents47.8%Not measuredOnly Kimi K3 measured
PostTrainBench32.0%Not measuredOnly Kimi K3 measured
Vending-Bench 2$5,165Not measuredOnly Kimi K3 measured
MCP Atlas82.3%Not measuredOnly Kimi K3 measured
Neither model has a result on the other 16 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index02
Reasoning benchmarks for Kimi K3 and Kimi K3.1 Pro
BenchmarkKimi K3Kimi K3.1 ProLeader
GPQA Diamond92.9%Not measuredOnly Kimi K3 measured
LiveBench reasoning90.7%91.1%Kimi K3.1 Pro
MysteryMechanism (Vals AI)Not measured26.1%Only Kimi K3.1 Pro measured
MMMU Pro (Vals AI)88.2%Not measuredOnly Kimi K3 measured
GPQA Diamond (Artificial Analysis run)93.5%Not measuredOnly Kimi K3 measured
Humanity's Last Exam (Artificial Analysis run)46.9%52.5%Kimi K3.1 Pro
GPQA Diamond (Epoch AI run)93.1%Not measuredOnly Kimi K3 measured
ARC-AGI94.5%Not measuredOnly Kimi K3 measured
ARC-AGI-260.4%Not measuredOnly Kimi K3 measured
SimpleBench60.7%Not measuredOnly Kimi K3 measured
Chess puzzles37.0%Not measuredOnly Kimi K3 measured
Mystery game puzzles26.0%Not measuredOnly Kimi K3 measured
LMArena Text: hard prompts1496Not measuredOnly Kimi K3 measured
LMArena Text: expert1520Not measuredOnly Kimi K3 measured
LMArena Text: hard prompts in English1496Not measuredOnly Kimi K3 measured
Humanity's Last Exam (Scale run)22.2%Not measuredOnly Kimi K3 measured
Neither model has a result on the other 7 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index02
Math benchmarks for Kimi K3 and Kimi K3.1 Pro
BenchmarkKimi K3Kimi K3.1 ProLeader
OTIS Mock AIME97.2%Not measuredOnly Kimi K3 measured
FrontierMath, tiers 1 to 372.2%Not measuredOnly Kimi K3 measured
FrontierMath, tier 439.0%Not measuredOnly Kimi K3 measured
ProofBench87.0%91.0%Kimi K3.1 Pro
LMArena Text: math1492Not measuredOnly Kimi K3 measured
LMArena Text: mathematical work1504Not measuredOnly Kimi K3 measured
MathArena47.5%59.6%Kimi K3.1 Pro
Neither model has a result on the other 7 boards here
KnowledgeDirectional onlyPublic boards, shown as published, kept out of the index11 boards, none shared
Knowledge benchmarks for Kimi K3 and Kimi K3.1 Pro
BenchmarkKimi K3Kimi K3.1 ProLeader
MMLU Pro88.0%Not measuredOnly Kimi K3 measured
LegalBench (Vals AI)86.2%Not measuredOnly Kimi K3 measured
CorpFin (Vals AI)71.6%Not measuredOnly Kimi K3 measured
TaxEval (Vals AI)75.7%Not measuredOnly Kimi K3 measured
MortgageTax (Vals AI)66.3%Not measuredOnly Kimi K3 measured
MedCode (Vals AI)49.4%Not measuredOnly Kimi K3 measured
SimpleQA Verified50.6%Not measuredOnly Kimi K3 measured
LMArena Text: science1508Not measuredOnly Kimi K3 measured
LMArena Text: medicine and healthcare1487Not measuredOnly Kimi K3 measured
LMArena Text: legal and government1502Not measuredOnly Kimi K3 measured
LMArena Text: business and finance1469Not measuredOnly Kimi K3 measured
Neither model has a result on the other 9 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index35
Web design benchmarks for Kimi K3 and Kimi K3.1 Pro
BenchmarkKimi K3Kimi K3.1 ProLeader
Design Arena: websites13351325Kimi K3
Design Arena: UI components13351400Kimi K3.1 Pro
Design Arena: game dev13631410Kimi K3.1 Pro
Design Arena: data viz13511300Kimi K3
Design Arena: 3D13841451Kimi K3.1 Pro
Design Arena: all code categories13591354Kimi K3
Design Arena: SVG13021328Kimi K3.1 Pro
LiveBench design77.2%77.8%Kimi K3.1 Pro
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index12
General benchmarks for Kimi K3 and Kimi K3.1 Pro
BenchmarkKimi K3Kimi K3.1 ProLeader
Vals Index53.0%62.5%Kimi K3.1 Pro
LiveBench data analysis78.7%79.1%Kimi K3.1 Pro
Public Benefits Bench (Vals AI)68.2%Not measuredOnly Kimi K3 measured
SAGE (Vals AI)86.8%Not measuredOnly Kimi K3 measured
MedScribe (Vals AI)88.0%Not measuredOnly Kimi K3 measured
Vals Multimodal Index73.4%Not measuredOnly Kimi K3 measured
Long context reasoning (AA-LCR)88.7%86.3%Kimi K3
DTBench91.2%Not measuredOnly Kimi K3 measured
LMCA52.7%Not measuredOnly Kimi K3 measured
Surface Evolver Bench95.0%Not measuredOnly Kimi K3 measured
Furniture assembly34.2%Not measuredOnly Kimi K3 measured
LMArena Text1476Not measuredOnly Kimi K3 measured
LMArena Text: instruction following1485Not measuredOnly Kimi K3 measured
LMArena Text: creative writing1457Not measuredOnly Kimi K3 measured
LMArena Text: English1481Not measuredOnly Kimi K3 measured
LMArena Text: non-English1466Not measuredOnly Kimi K3 measured
LMArena Text: Chinese1531Not measuredOnly Kimi K3 measured
LMArena Text: German1489Not measuredOnly Kimi K3 measured
LMArena Text: Japanese1495Not measuredOnly Kimi K3 measured
LMArena Text: Korean1459Not measuredOnly Kimi K3 measured
LMArena Text: French1486Not measuredOnly Kimi K3 measured
LMArena Text: Spanish1477Not measuredOnly Kimi K3 measured
LMArena Text: Russian1484Not measuredOnly Kimi K3 measured
LMArena Text: Polish1462Not measuredOnly Kimi K3 measured
LMArena Text: multi-turn1490Not measuredOnly Kimi K3 measured
LMArena Text: longer queries1493Not measuredOnly Kimi K3 measured
LMArena Text: writing and language1471Not measuredOnly Kimi K3 measured
LMArena Text: entertainment and media1452Not measuredOnly Kimi K3 measured
EQ-Bench 41319Not measuredOnly Kimi K3 measured
Neither model has a result on the other 19 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Kimi K3 and Kimi K3.1 Pro
BenchmarkKimi K3Kimi K3.1 ProLeader
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

Kimi K3$0.011Fits in one request
Kimi K3.1 Pro$0.0070Fits in one request

Kimi K3.1 Pro costs less

Repository review

50K input + 3K output tokens

Kimi K3$0.195Fits in one request
Kimi K3.1 Pro$0.130Fits in one request

Kimi K3.1 Pro costs less

Agent loop

200K input + 10K output tokens

Kimi K3$0.750Fits in one request
Kimi K3.1 Pro$0.500Fits in one request

Kimi K3.1 Pro 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 Kimi K3 and Kimi K3.1 Pro
SpecificationMoonshotAI Kimi K3MoonshotAI Kimi K3.1 Pro
MakerMoonshot AIMoonshot AI
WeightsOpen weightsNo public weights listed
ReleasedJuly 16, 2026October 23, 2026
Context window1.05M1.05M
Input $/Mtok$3.00$2.00
Output $/Mtok$15.00$10.00
Coding index62.382.2
Independent measurements behind it64
Cost per solved task$0.81Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Kimi K3 better than Kimi K3.1 Pro for coding?

Pick Kimi K3.1 Pro for coding: it scores 82.2 on the Vibe Coding Index against 62.3 for Kimi K3, though on 4 benchmarks against 6. Pick Kimi K3 for work measured by Vibe Code Bench (Vals AI) or LiveBench research, where it leads.

Which is cheaper, Kimi K3 or Kimi K3.1 Pro?

Kimi K3 costs $3.00 per million input tokens and $15.00 per million output tokens; Kimi K3.1 Pro costs $2.00 and $10.00. Cost per solved task is known for Kimi K3 only.

Which has the bigger context window, Kimi K3 or Kimi K3.1 Pro?

Neither: both take 1.05M tokens.

How many benchmarks is the Kimi K3 vs Kimi K3.1 Pro comparison based on?

32 benchmarks have a result for both models as of October 29, 2026. Kimi K3's coding index rests on 6 independent benchmarks and Kimi K3.1 Pro's on 4. Where only one model has a result, the page says so instead of naming a winner.

Compare next

Embed this comparison on your site

Free under CC BY 4.0, while the source link stays visible. Preview the frame · Terms and other embeds

<iframe src="https://llmbenchmark.ai/embed/compare/kimi-k3-vs-kimi-k3-1-pro" title="Kimi K3 vs Kimi K3.1 Pro, LLMBenchmark.ai" width="100%" height="360" style="border:0;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/kimi-k3-vs-kimi-k3-1-pro">LLMBenchmark.ai, Kimi K3 vs Kimi K3.1 Pro</a></p>