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Kimi K3 vs Solar Pro 4

Updated October 21, 2026. 45 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Kimi K3 Replace Solar Pro 4
Kimi K3Moonshot AI
Coding
61.8
Overall
43.6
Output $/M
$11.936
45
Solar Pro 4Upstage
Coding
24.4
Overall
28.2
Output $/M
$0.60
0
vs boards won of 45 shared

Decision reading

Pick Kimi K3 for coding: it scores 61.8 on the Vibe Coding Index against 24.4 for Solar Pro 4.

Pick Solar Pro 4 when output tokens cost 19.9x less.

Model AKimi K3Moonshot AI61.8/1002 independent benchmarks$0.81 per solved taskModel BSolar Pro 4Upstage24.4/1001 independent benchmarkNo cost per solved task
Shared results
45
Kimi K3 only
72
Solar Pro 4 only
0
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
Kimi K3 61.8 from 2 benchmarks, Solar Pro 4 24.4 from 1 benchmark.
Widest category
Coding, 27.7 points apart on average over 8 shared benchmarks.
Widest single gap
ALE-Bench: Kimi K3 1524.5 against Solar Pro 4 179.3, 44.8 points apart on a 0 to 100 scale.
Output price
Kimi K3 $11.936 against Solar Pro 4 $0.60 per million output tokens, 19.9x apart.
Context window
Kimi K3 takes 1.05M tokens, Solar Pro 4 524K.

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 K3BarsSolar Pro 4Ties
Coding80
Intelligence10
Agentic work10
Reasoning50
Math20
Knowledge40
Web design60
General180
All shared boards450
CodingLike-for-likeFour of these boards feed the Vibe Coding Index80
Coding benchmarks for Kimi K3 and Solar Pro 4
BenchmarkKimi K3Solar Pro 4Leader
LiveBench coding59.3%Not measuredOnly Kimi K3 measured
LMArena WebDev16551371Kimi K3
AA Coding Index76.252.7Kimi K3
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%Not measuredOnly Kimi K3 measured
Vibe Code Bench (Vals AI)85.0%Not measuredOnly Kimi K3 measured
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%Not measuredOnly Kimi K3 measured
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%48.0%Kimi K3
FrontierCode44.2%Not measuredOnly Kimi K3 measured
FrontierSWE25.9%Not measuredOnly Kimi K3 measured
WeirdML82.6%Not measuredOnly Kimi K3 measured
ALE-Bench1524.5179.3Kimi K3
LMArena Text: coding15081438Kimi K3
LMArena Text: software and IT14991431Kimi K3
LMArena WebDev: React16701363Kimi K3
LMArena WebDev: HTML16441371Kimi K3
LMArena WebDev: from an image1579Not measuredOnly Kimi K3 measured
Neither model has a result on the other 14 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
Intelligence benchmarks for Kimi K3 and Solar Pro 4
BenchmarkKimi K3Solar Pro 4Leader
AA Intelligence Index43.628.2Kimi K3
Epoch Capabilities Index157.9Not measuredOnly Kimi K3 measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for Kimi K3 and Solar Pro 4
BenchmarkKimi K3Solar Pro 4Leader
AA Agentic Index50.0Not measuredOnly Kimi K3 measured
Design Arena: agents building web apps12961105Kimi K3
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 apps1256Not measuredOnly Kimi K3 measured
Design Arena: agents building Godot games1223Not measuredOnly Kimi K3 measured
Design Arena: agents building games1252Not measuredOnly Kimi K3 measured
Design Arena: HTML slides1256Not measuredOnly Kimi K3 measured
Design Arena: PowerPoint slides1273Not measuredOnly Kimi K3 measured
Design Arena: spreadsheets1058Not measuredOnly Kimi K3 measured
LiveBench research79.0%Not measuredOnly Kimi K3 measured
LiveBench browser16.0%Not measuredOnly Kimi K3 measured
LiveBench long agentic42.8%Not measuredOnly Kimi K3 measured
Finance Agent (Vals AI)53.1%Not measuredOnly Kimi K3 measured
Tax Agent Bench (Vals AI)33.4%Not measuredOnly Kimi K3 measured
Legal Research Bench (Vals AI)46.1%Not measuredOnly Kimi K3 measured
Harvey's Legal Agent Benchmark (Vals AI)12.9%Not measuredOnly Kimi K3 measured
Excel Modeling Benchmark (Vals AI)66.7%Not measuredOnly Kimi K3 measured
BioMysteryBench (Vals AI)72.6%Not measuredOnly Kimi K3 measured
Terminal-Bench-Science (Vals AI)1.4%Not measuredOnly Kimi K3 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
Neither model has a result on the other 15 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index50
Reasoning benchmarks for Kimi K3 and Solar Pro 4
BenchmarkKimi K3Solar Pro 4Leader
GPQA Diamond92.9%Not measuredOnly Kimi K3 measured
LiveBench reasoning90.7%Not measuredOnly Kimi K3 measured
MMMU Pro (Vals AI)88.2%Not measuredOnly Kimi K3 measured
GPQA Diamond (Artificial Analysis run)93.5%89.1%Kimi K3
Humanity's Last Exam (Artificial Analysis run)46.9%29.8%Kimi K3
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 prompts14951400Kimi K3
LMArena Text: expert15201428Kimi K3
LMArena Text: hard prompts in English14961427Kimi K3
Neither model has a result on the other 7 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index20
Math benchmarks for Kimi K3 and Solar Pro 4
BenchmarkKimi K3Solar Pro 4Leader
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%Not measuredOnly Kimi K3 measured
LMArena Text: math14941421Kimi K3
LMArena Text: mathematical work15051427Kimi K3
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index40
Knowledge benchmarks for Kimi K3 and Solar Pro 4
BenchmarkKimi K3Solar Pro 4Leader
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: science15081404Kimi K3
LMArena Text: medicine and healthcare14891374Kimi K3
LMArena Text: legal and government15031383Kimi K3
LMArena Text: business and finance14701381Kimi K3
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index60
Web design benchmarks for Kimi K3 and Solar Pro 4
BenchmarkKimi K3Solar Pro 4Leader
Design Arena: websites13361176Kimi K3
Design Arena: UI components13451150Kimi K3
Design Arena: game dev13611170Kimi K3
Design Arena: data viz13501177Kimi K3
Design Arena: 3D13881178Kimi K3
Design Arena: all code categories13611182Kimi K3
Design Arena: SVG1301Not measuredOnly Kimi K3 measured
LiveBench design77.2%Not measuredOnly Kimi K3 measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index180
General benchmarks for Kimi K3 and Solar Pro 4
BenchmarkKimi K3Solar Pro 4Leader
Vals Index53.0%Not measuredOnly Kimi K3 measured
LiveBench data analysis78.7%Not measuredOnly Kimi K3 measured
Public Benefits Bench (Vals AI)68.2%Not measuredOnly Kimi K3 measured
SAGE (Vals AI)52.8%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%70.7%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 Text14761388Kimi K3
LMArena Text: instruction following14851375Kimi K3
LMArena Text: creative writing14571317Kimi K3
LMArena Text: English14811414Kimi K3
LMArena Text: non-English14661363Kimi K3
LMArena Text: Chinese15291422Kimi K3
LMArena Text: German14901358Kimi K3
LMArena Text: Japanese14941320Kimi K3
LMArena Text: Korean14601383Kimi K3
LMArena Text: French14921400Kimi K3
LMArena Text: Spanish14721409Kimi K3
LMArena Text: Russian14851357Kimi K3
LMArena Text: Polish14581304Kimi K3
LMArena Text: multi-turn14891385Kimi K3
LMArena Text: longer queries14941382Kimi K3
LMArena Text: writing and language14711344Kimi K3
LMArena Text: entertainment and media14531332Kimi K3
Neither model has a result on the other 18 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Kimi K3 and Solar Pro 4
BenchmarkKimi K3Solar Pro 4Leader
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$0.0062Fits in one request
Solar Pro 4$0.0004Fits in one request

Solar Pro 4 costs less

Repository review

50K input + 3K output tokens

Kimi K3$0.048Fits in one request
Solar Pro 4$0.0093Fits in one request

Solar Pro 4 costs less

Agent loop

200K input + 10K output tokens

Kimi K3$0.167Fits in one request
Solar Pro 4$0.036Fits in one request

Solar Pro 4 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 Solar Pro 4
SpecificationMoonshotAI Kimi K3Upstage Solar Pro 4
MakerMoonshot AIUpstage
WeightsOpen weightsNo public weights listed
ReleasedJuly 16, 2026August 10, 2026
Context window1.05M524K
Input $/Mtok$0.239$0.15
Output $/Mtok$11.936$0.60
Coding index61.824.4
Independent measurements behind it21
Cost per solved task$0.81Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Kimi K3 better than Solar Pro 4 for coding?

Pick Kimi K3 for coding: it scores 61.8 on the Vibe Coding Index against 24.4 for Solar Pro 4. Pick Solar Pro 4 when output tokens cost 19.9x less.

Which is cheaper, Kimi K3 or Solar Pro 4?

Kimi K3 costs $0.239 per million input tokens and $11.936 per million output tokens; Solar Pro 4 costs $0.15 and $0.60. Cost per solved task is known for Kimi K3 only.

Which has the bigger context window, Kimi K3 or Solar Pro 4?

Kimi K3, with 1.05M tokens against 524K.

How many benchmarks is the Kimi K3 vs Solar Pro 4 comparison based on?

45 benchmarks have a result for both models as of October 21, 2026. Kimi K3's coding index rests on 2 independent benchmarks and Solar Pro 4's on 1. Where only one model has a result, the page says so instead of naming a winner.

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