Kimi K3 vs Muse Wonder
Updated October 21, 2026. 57 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.
Decision reading
Pick Muse Wonder for coding: it scores 64.5 on the Vibe Coding Index against 61.8 for Kimi K3, though on 1 benchmark against 2.
Pick Kimi K3 when output tokens cost 1.7x less, or when what matters is LMArena WebDev or Vibe Code Bench (Vals AI), where it leads.
- Shared results
- 57
- Kimi K3 only
- 60
- Muse Wonder only
- 3
- 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.
Coding
Vibe Coding Index, four public coding benchmarks
Muse Wonder
Muse Wonder scores 64.5 against 61.8.
2 and 1 benchmarks behind the scores
Intelligence
AA Intelligence Index
No call
Only Kimi K3 has a AA Intelligence Index result, 43.6.
Directional only
Agentic work
AA Agentic Index
No call
Only Kimi K3 has a AA Agentic Index result, 50.0.
Directional only
Reasoning
GPQA Diamond
No call
Only Kimi K3 has a GPQA Diamond result, 92.9%.
Directional only
Knowledge
MMLU Pro
No call
Only Kimi K3 has a MMLU Pro result, 88.0%.
Directional only
Web design
Design Arena: websites
Muse Wonder
Muse Wonder leads, 1361 against 1336.
Same board, both measured
General
Vals Index
Muse Wonder
Muse Wonder leads, 64.9% against 53.0%.
Same board, both measured
Long documents
Listed context window
No call
Both take 1.05M tokens.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Kimi K3
Kimi K3 $0.0062, Muse Wonder $0.014 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only Kimi K3 has the number, $0.81.
Directional only
At a glance
- Coding index
- Kimi K3 61.8 from 2 benchmarks, Muse Wonder 64.5 from 1 benchmark.
- Widest category
- Agentic work, 10.9 points apart on average over 9 shared benchmarks.
- Widest single gap
- Code migration (Vals AI): Kimi K3 16.1% against Muse Wonder 62.5%, 46.4 points apart on a 0 to 100 scale.
- Output price
- Kimi K3 $11.936 against Muse Wonder $20.00 per million output tokens, 1.7x 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.
| Category | Kimi K3 | Bars | Muse Wonder | Ties |
|---|---|---|---|---|
| Coding | 3 | 10 | ||
| Intelligence | 0 | 1 | ||
| Agentic work | 1 | 8 | ||
| Reasoning | 1 | 3 | ||
| Math | 2 | 1 | ||
| Knowledge | 1 | 3 | ||
| Web design | 1 | 5 | ||
| General | 2 | 15 | ||
| All shared boards | 11 | 46 |
CodingLike-for-likeFour of these boards feed the Vibe Coding Index310
| Benchmark | Kimi K3 | Muse Wonder | Leader |
|---|---|---|---|
| LiveBench coding | 59.3% | Not measured | Only Kimi K3 measured |
| LMArena WebDev | 1655 | 1652 | Kimi K3 |
| AA Coding Index | 76.2 | Not measured | Only Kimi K3 measured |
| LiveCodeBench (Vals AI) | 87.2% | Not measured | Only Kimi K3 measured |
| SWE-bench Verified (Vals AI) | 93.4% | Not measured | Only Kimi K3 measured |
| Terminal-Bench 4 (Vals AI) | 17.2% | 49.5% | Muse Wonder |
| Vibe Code Bench (Vals AI) | 85.0% | 83.1% | Kimi K3 |
| Code migration (Vals AI) | 16.1% | 62.5% | Muse Wonder |
| ProgramBench (Vals AI) | 2.0% | Not measured | Only Kimi K3 measured |
| IOI (Vals AI) | 48.9% | 66.9% | Muse Wonder |
| Terminal-Bench 2.1 (Vals AI) | 80.9% | Not measured | Only Kimi K3 measured |
| SWE-bench Multimodal (Vals AI) | 44.2% | 45.6% | Muse Wonder |
| Vibe Code Bench 1-100 (Vals AI) | 18.2% | 26.6% | Muse Wonder |
| CyberBench (Vals AI) | 75.2% | 80.4% | Muse Wonder |
| SciCode | 59.5% | 60.3% | Muse Wonder |
| FrontierCode | 44.2% | Not measured | Only Kimi K3 measured |
| FrontierSWE | 25.9% | Not measured | Only Kimi K3 measured |
| WeirdML | 82.6% | Not measured | Only Kimi K3 measured |
| ALE-Bench | 1524.5 | Not measured | Only Kimi K3 measured |
| LMArena Text: coding | 1508 | 1522 | Muse Wonder |
| LMArena Text: software and IT | 1499 | 1515 | Muse Wonder |
| LMArena WebDev: React | 1670 | 1641 | Kimi K3 |
| LMArena WebDev: HTML | 1644 | 1694 | Muse Wonder |
| LMArena WebDev: from an image | 1579 | Not measured | Only 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 index01
| Benchmark | Kimi K3 | Muse Wonder | Leader |
|---|---|---|---|
| AA Intelligence Index | 43.6 | Not measured | Only Kimi K3 measured |
| Epoch Capabilities Index | 157.9 | 161.8 | Muse Wonder |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index18
| Benchmark | Kimi K3 | Muse Wonder | Leader |
|---|---|---|---|
| AA Agentic Index | 50.0 | Not measured | Only Kimi K3 measured |
| Design Arena: agents building web apps | 1296 | Not measured | Only Kimi K3 measured |
| Design Arena: agents building full-stack apps | 1315 | Not measured | Only Kimi K3 measured |
| Design Arena: agents building mobile apps | 1267 | Not measured | Only Kimi K3 measured |
| Design Arena: agents building Android apps | 1256 | Not measured | Only Kimi K3 measured |
| Design Arena: agents building Godot games | 1223 | Not measured | Only Kimi K3 measured |
| Design Arena: agents building games | 1252 | Not measured | Only Kimi K3 measured |
| Design Arena: HTML slides | 1256 | Not measured | Only Kimi K3 measured |
| Design Arena: PowerPoint slides | 1273 | Not measured | Only Kimi K3 measured |
| Design Arena: spreadsheets | 1058 | 1236 | Muse Wonder |
| LiveBench research | 79.0% | Not measured | Only Kimi K3 measured |
| LiveBench browser | 16.0% | Not measured | Only Kimi K3 measured |
| LiveBench long agentic | 42.8% | Not measured | Only Kimi K3 measured |
| Finance Agent (Vals AI) | 53.1% | 56.6% | Muse Wonder |
| Tax Agent Bench (Vals AI) | 33.4% | 36.3% | Muse Wonder |
| Legal Research Bench (Vals AI) | 46.1% | 50.5% | Muse Wonder |
| Harvey's Legal Agent Benchmark (Vals AI) | 12.9% | 23.8% | Muse Wonder |
| Excel Modeling Benchmark (Vals AI) | 66.7% | 67.1% | Muse Wonder |
| BioMysteryBench (Vals AI) | 72.6% | 67.0% | Kimi K3 |
| Terminal-Bench-Science (Vals AI) | 1.4% | 22.9% | Muse Wonder |
| Vals Science Index | Not measured | 39.1% | Only Muse Wonder measured |
| Time Horizon Index (Vals AI) | 10.5% | Not measured | Only Kimi K3 measured |
| CUA-bench (Vals AI) | Not measured | 7.2% | Only Muse Wonder measured |
| APEX-Agents | 47.8% | Not measured | Only Kimi K3 measured |
| PostTrainBench | 32.0% | Not measured | Only Kimi K3 measured |
| Vending-Bench 2 | $5,165 | $9,432 | Muse Wonder |
| Neither model has a result on the other 13 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index13
| Benchmark | Kimi K3 | Muse Wonder | Leader |
|---|---|---|---|
| GPQA Diamond | 92.9% | Not measured | Only Kimi K3 measured |
| LiveBench reasoning | 90.7% | Not measured | Only Kimi K3 measured |
| MysteryMechanism (Vals AI) | Not measured | 27.5% | Only Muse Wonder measured |
| MMMU Pro (Vals AI) | 88.2% | Not measured | Only Kimi K3 measured |
| GPQA Diamond (Artificial Analysis run) | 93.5% | Not measured | Only Kimi K3 measured |
| Humanity's Last Exam (Artificial Analysis run) | 46.9% | 50.1% | Muse Wonder |
| GPQA Diamond (Epoch AI run) | 93.1% | Not measured | Only Kimi K3 measured |
| ARC-AGI | 94.5% | Not measured | Only Kimi K3 measured |
| ARC-AGI-2 | 60.4% | Not measured | Only Kimi K3 measured |
| SimpleBench | 60.7% | Not measured | Only Kimi K3 measured |
| Chess puzzles | 37.0% | Not measured | Only Kimi K3 measured |
| Mystery game puzzles | 26.0% | Not measured | Only Kimi K3 measured |
| LMArena Text: hard prompts | 1495 | 1506 | Muse Wonder |
| LMArena Text: expert | 1520 | 1513 | Kimi K3 |
| LMArena Text: hard prompts in English | 1496 | 1506 | Muse Wonder |
| Neither model has a result on the other 6 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index21
| Benchmark | Kimi K3 | Muse Wonder | Leader |
|---|---|---|---|
| OTIS Mock AIME | 97.2% | Not measured | Only Kimi K3 measured |
| FrontierMath, tiers 1 to 3 | 72.2% | Not measured | Only Kimi K3 measured |
| FrontierMath, tier 4 | 39.0% | Not measured | Only Kimi K3 measured |
| ProofBench | 87.0% | 84.0% | Kimi K3 |
| LMArena Text: math | 1494 | 1486 | Kimi K3 |
| LMArena Text: mathematical work | 1505 | 1514 | Muse Wonder |
| Neither model has a result on the other 7 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index13
| Benchmark | Kimi K3 | Muse Wonder | Leader |
|---|---|---|---|
| MMLU Pro | 88.0% | Not measured | Only Kimi K3 measured |
| LegalBench (Vals AI) | 86.2% | Not measured | Only Kimi K3 measured |
| CorpFin (Vals AI) | 71.6% | Not measured | Only Kimi K3 measured |
| TaxEval (Vals AI) | 75.7% | Not measured | Only Kimi K3 measured |
| MortgageTax (Vals AI) | 66.3% | Not measured | Only Kimi K3 measured |
| MedCode (Vals AI) | 49.4% | Not measured | Only Kimi K3 measured |
| SimpleQA Verified | 50.6% | Not measured | Only Kimi K3 measured |
| LMArena Text: science | 1508 | 1506 | Kimi K3 |
| LMArena Text: medicine and healthcare | 1489 | 1512 | Muse Wonder |
| LMArena Text: legal and government | 1503 | 1505 | Muse Wonder |
| LMArena Text: business and finance | 1470 | 1483 | Muse Wonder |
| Neither model has a result on the other 6 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index15
| Benchmark | Kimi K3 | Muse Wonder | Leader |
|---|---|---|---|
| Design Arena: websites | 1336 | 1361 | Muse Wonder |
| Design Arena: UI components | 1345 | 1371 | Muse Wonder |
| Design Arena: game dev | 1361 | 1380 | Muse Wonder |
| Design Arena: data viz | 1350 | 1330 | Kimi K3 |
| Design Arena: 3D | 1388 | 1425 | Muse Wonder |
| Design Arena: all code categories | 1361 | 1370 | Muse Wonder |
| Design Arena: SVG | 1301 | Not measured | Only Kimi K3 measured |
| LiveBench design | 77.2% | Not measured | Only 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 index215
| Benchmark | Kimi K3 | Muse Wonder | Leader |
|---|---|---|---|
| Vals Index | 53.0% | 64.9% | Muse Wonder |
| LiveBench data analysis | 78.7% | Not measured | Only Kimi K3 measured |
| Public Benefits Bench (Vals AI) | 68.2% | 70.2% | Muse Wonder |
| SAGE (Vals AI) | 52.8% | Not measured | Only Kimi K3 measured |
| MedScribe (Vals AI) | 88.0% | Not measured | Only Kimi K3 measured |
| Vals Multimodal Index | 73.4% | Not measured | Only Kimi K3 measured |
| Long context reasoning (AA-LCR) | 88.7% | 80.7% | Kimi K3 |
| DTBench | 91.2% | 95.2% | Muse Wonder |
| LMCA | 52.7% | 56.8% | Muse Wonder |
| Surface Evolver Bench | 95.0% | Not measured | Only Kimi K3 measured |
| Furniture assembly | 34.2% | Not measured | Only Kimi K3 measured |
| LMArena Text | 1476 | 1502 | Muse Wonder |
| LMArena Text: instruction following | 1485 | 1491 | Muse Wonder |
| LMArena Text: creative writing | 1457 | 1491 | Muse Wonder |
| LMArena Text: English | 1481 | 1507 | Muse Wonder |
| LMArena Text: non-English | 1466 | 1492 | Muse Wonder |
| LMArena Text: Chinese | 1529 | 1537 | Muse Wonder |
| LMArena Text: German | 1490 | Not measured | Only Kimi K3 measured |
| LMArena Text: Japanese | 1494 | Not measured | Only Kimi K3 measured |
| LMArena Text: Korean | 1460 | Not measured | Only Kimi K3 measured |
| LMArena Text: French | 1492 | 1523 | Muse Wonder |
| LMArena Text: Spanish | 1472 | Not measured | Only Kimi K3 measured |
| LMArena Text: Russian | 1485 | 1522 | Muse Wonder |
| LMArena Text: Polish | 1458 | Not measured | Only Kimi K3 measured |
| LMArena Text: multi-turn | 1489 | 1510 | Muse Wonder |
| LMArena Text: longer queries | 1494 | 1493 | Kimi K3 |
| LMArena Text: writing and language | 1471 | 1496 | Muse Wonder |
| LMArena Text: entertainment and media | 1453 | 1482 | Muse Wonder |
| 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
| Benchmark | Kimi K3 | Muse Wonder | Leader |
|---|---|---|---|
| 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 costs less
Repository review
50K input + 3K output tokens
Kimi K3 costs less
Agent loop
200K input + 10K output tokens
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.
| Specification | MoonshotAI Kimi K3 | Meta Muse Wonder |
|---|---|---|
| Maker | Moonshot AI | Meta |
| Weights | Open weights | No public weights listed |
| Released | July 16, 2026 | October 12, 2026 |
| Context window | 1.05M | 1.05M |
| Input $/Mtok | $0.239 | $4.00 |
| Output $/Mtok | $11.936 | $20.00 |
| Coding index | 61.8 | 64.5 |
| Independent measurements behind it | 2 | 1 |
| Cost per solved task | $0.81 | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Kimi K3 better than Muse Wonder for coding?
Pick Muse Wonder for coding: it scores 64.5 on the Vibe Coding Index against 61.8 for Kimi K3, though on 1 benchmark against 2. Pick Kimi K3 when output tokens cost 1.7x less, or when what matters is LMArena WebDev or Vibe Code Bench (Vals AI), where it leads.
Which is cheaper, Kimi K3 or Muse Wonder?
Kimi K3 costs $0.239 per million input tokens and $11.936 per million output tokens; Muse Wonder costs $4.00 and $20.00. Cost per solved task is known for Kimi K3 only.
Which has the bigger context window, Kimi K3 or Muse Wonder?
Neither: both take 1.05M tokens.
How many benchmarks is the Kimi K3 vs Muse Wonder comparison based on?
57 benchmarks have a result for both models as of October 21, 2026. Kimi K3's coding index rests on 2 independent benchmarks and Muse Wonder's on 1. Where only one model has a result, the page says so instead of naming a winner.