Kimi K3 vs o1
Updated October 21, 2026. 49 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.
Decision reading
Kimi K3 and o1 are level for coding, 61.8 against 61.7 on the Vibe Coding Index, so price and context decide.
o1 is neither cheaper nor larger in context, and leads no benchmark both models were measured on. Pick Kimi K3 when output tokens cost 5.0x less, or when the context window is larger, 1.05M against 200K tokens.
- Shared results
- 49
- Kimi K3 only
- 68
- o1 only
- 19
- Like-for-like categories
- 6 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
No call
Level: 61.8 against 61.7, inside 2 points.
2 and 1 benchmarks behind the scores
Intelligence
AA Intelligence Index
Kimi K3
Kimi K3 leads, 43.6 against 15.2.
Same board, both measured
Agentic work
AA Agentic Index
No call
Only Kimi K3 has a AA Agentic Index result, 50.0.
Directional only
Reasoning
GPQA Diamond
Kimi K3
Kimi K3 leads, 92.9% against 73.2%.
Same board, both measured
Math
AIME
No call
Only o1 has a AIME result, 71.5%.
Directional only
Knowledge
MMLU Pro
Kimi K3
Kimi K3 leads, 88.0% against 83.5%.
Same board, both measured
Web design
Design Arena: websites
No call
Only Kimi K3 has a Design Arena: websites result, 1336.
Directional only
General
Vals Index
No call
Only Kimi K3 has a Vals Index result, 53.0%.
Directional only
Long documents
Listed context window
Kimi K3
Kimi K3 takes 1.05M tokens against 200K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Kimi K3
Kimi K3 $0.0062, o1 $0.045 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, o1 61.7 from 1 benchmark.
- Widest category
- Coding, 31.1 points apart on average over 5 shared benchmarks.
- Widest single gap
- ARC-AGI: Kimi K3 94.5% against o1 30.7%, 63.8 points apart on a 0 to 100 scale.
- Output price
- Kimi K3 $11.936 against o1 $60.00 per million output tokens, 5.0x apart.
- Context window
- Kimi K3 takes 1.05M tokens, o1 200K.
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 | o1 | Ties |
|---|---|---|---|---|
| Coding | 5 | 0 | ||
| Intelligence | 2 | 0 | ||
| Reasoning | 11 | 0 | ||
| Math | 4 | 0 | ||
| Knowledge | 8 | 0 | ||
| General | 19 | 0 | ||
| All shared boards | 49 | 0 |
CodingLike-for-likeFour of these boards feed the Vibe Coding Index50
| Benchmark | Kimi K3 | o1 | Leader |
|---|---|---|---|
| Aider polyglot | Not measured | 61.7% | Only o1 measured |
| LiveBench coding | 59.3% | Not measured | Only Kimi K3 measured |
| LMArena WebDev | 1655 | Not measured | Only Kimi K3 measured |
| AA Coding Index | 76.2 | 39.7 | Kimi K3 |
| LiveCodeBench (Vals AI) | 87.2% | 50.3% | Kimi K3 |
| SWE-bench Verified (Vals AI) | 93.4% | Not measured | Only Kimi K3 measured |
| Terminal-Bench 4 (Vals AI) | 17.2% | Not measured | Only Kimi K3 measured |
| Vibe Code Bench (Vals AI) | 85.0% | Not measured | Only Kimi K3 measured |
| Code migration (Vals AI) | 16.1% | Not measured | Only Kimi K3 measured |
| ProgramBench (Vals AI) | 2.0% | Not measured | Only Kimi K3 measured |
| IOI (Vals AI) | 48.9% | Not measured | Only Kimi K3 measured |
| Terminal-Bench 2.1 (Vals AI) | 80.9% | Not measured | Only Kimi K3 measured |
| SWE-bench Multimodal (Vals AI) | 44.2% | Not measured | Only Kimi K3 measured |
| Vibe Code Bench 1-100 (Vals AI) | 18.2% | Not measured | Only Kimi K3 measured |
| CyberBench (Vals AI) | 75.2% | Not measured | Only Kimi K3 measured |
| LiveCodeBench (Artificial Analysis run) | Not measured | 67.9% | Only o1 measured |
| SciCode | 59.5% | Not measured | Only Kimi K3 measured |
| Terminal-Bench Hard (Artificial Analysis run) | Not measured | 12.9% | Only o1 measured |
| FrontierCode | 44.2% | Not measured | Only Kimi K3 measured |
| FrontierSWE | 25.9% | Not measured | Only Kimi K3 measured |
| WeirdML | 82.6% | 46.1% | Kimi K3 |
| ALE-Bench | 1524.5 | Not measured | Only Kimi K3 measured |
| LMArena Text: coding | 1508 | 1367 | Kimi K3 |
| LMArena Text: software and IT | 1499 | 1366 | Kimi K3 |
| LMArena WebDev: React | 1670 | Not measured | Only Kimi K3 measured |
| LMArena WebDev: HTML | 1644 | Not measured | Only Kimi K3 measured |
| LMArena WebDev: from an image | 1579 | Not measured | Only Kimi K3 measured |
| Neither model has a result on the other 11 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
| Benchmark | Kimi K3 | o1 | Leader |
|---|---|---|---|
| AA Intelligence Index | 43.6 | 15.2 | Kimi K3 |
| Epoch Capabilities Index | 157.9 | 141.7 | Kimi K3 |
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index26 boards, none shared
| Benchmark | Kimi K3 | o1 | 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 | Not measured | Only Kimi K3 measured |
| 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% | Not measured | Only Kimi K3 measured |
| Tax Agent Bench (Vals AI) | 33.4% | Not measured | Only Kimi K3 measured |
| Legal Research Bench (Vals AI) | 46.1% | Not measured | Only Kimi K3 measured |
| Harvey's Legal Agent Benchmark (Vals AI) | 12.9% | Not measured | Only Kimi K3 measured |
| Excel Modeling Benchmark (Vals AI) | 66.7% | Not measured | Only Kimi K3 measured |
| BioMysteryBench (Vals AI) | 72.6% | Not measured | Only Kimi K3 measured |
| Terminal-Bench-Science (Vals AI) | 1.4% | Not measured | Only Kimi K3 measured |
| Time Horizon Index (Vals AI) | 10.5% | Not measured | Only Kimi K3 measured |
| τ²-Bench Telecom | Not measured | 62.6% | Only o1 measured |
| APEX-Agents | 47.8% | Not measured | Only Kimi K3 measured |
| METR time horizons | Not measured | 51.1% | Only o1 measured |
| PostTrainBench | 32.0% | Not measured | Only Kimi K3 measured |
| Vending-Bench 2 | $5,165 | Not measured | Only Kimi K3 measured |
| Neither model has a result on the other 13 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index110
| Benchmark | Kimi K3 | o1 | Leader |
|---|---|---|---|
| GPQA Diamond | 92.9% | 73.2% | Kimi K3 |
| LiveBench reasoning | 90.7% | Not measured | Only Kimi K3 measured |
| MMMU Pro (Vals AI) | 88.2% | 77.4% | Kimi K3 |
| GPQA Diamond (Artificial Analysis run) | 93.5% | 74.7% | Kimi K3 |
| Humanity's Last Exam (Artificial Analysis run) | 46.9% | 7.0% | Kimi K3 |
| GPQA Diamond (Epoch AI run) | 93.1% | 76.8% | Kimi K3 |
| ARC-AGI | 94.5% | 30.7% | Kimi K3 |
| ARC-AGI-2 | 60.4% | Not measured | Only Kimi K3 measured |
| SimpleBench | 60.7% | 40.1% | Kimi K3 |
| Chess puzzles | 37.0% | 10.0% | Kimi K3 |
| Mystery game puzzles | 26.0% | Not measured | Only Kimi K3 measured |
| VPCT | Not measured | 37.0% | Only o1 measured |
| LMArena Text: hard prompts | 1495 | 1371 | Kimi K3 |
| LMArena Text: expert | 1520 | 1361 | Kimi K3 |
| LMArena Text: hard prompts in English | 1496 | 1372 | Kimi K3 |
| Neither model has a result on the other 6 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index40
| Benchmark | Kimi K3 | o1 | Leader |
|---|---|---|---|
| AIME | Not measured | 71.5% | Only o1 measured |
| MATH 500 (Vals AI) | Not measured | 90.4% | Only o1 measured |
| MGSM (Vals AI) | Not measured | 89.3% | Only o1 measured |
| OTIS Mock AIME | 97.2% | 73.3% | Kimi K3 |
| FrontierMath, tiers 1 to 3 | 72.2% | 14.7% | Kimi K3 |
| FrontierMath, tier 4 | 39.0% | Not measured | Only Kimi K3 measured |
| ProofBench | 87.0% | Not measured | Only Kimi K3 measured |
| MATH level 5 | Not measured | 94.7% | Only o1 measured |
| LMArena Text: math | 1494 | 1388 | Kimi K3 |
| LMArena Text: mathematical work | 1505 | 1390 | Kimi K3 |
| Neither model has a result on the other 3 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index80
| Benchmark | Kimi K3 | o1 | Leader |
|---|---|---|---|
| MMLU Pro | 88.0% | 83.5% | Kimi K3 |
| LegalBench (Vals AI) | 86.2% | 80.4% | Kimi K3 |
| CorpFin (Vals AI) | 71.6% | Not measured | Only Kimi K3 measured |
| TaxEval (Vals AI) | 75.7% | 74.3% | Kimi K3 |
| MortgageTax (Vals AI) | 66.3% | Not measured | Only Kimi K3 measured |
| MedQA (Vals AI) | Not measured | 96.5% | Only o1 measured |
| MedCode (Vals AI) | 49.4% | Not measured | Only Kimi K3 measured |
| MMLU Pro (Artificial Analysis run) | Not measured | 84.1% | Only o1 measured |
| SimpleQA Verified | 50.6% | 41.1% | Kimi K3 |
| GeoBench | Not measured | 80.0% | Only o1 measured |
| LMArena Text: science | 1508 | 1369 | Kimi K3 |
| LMArena Text: medicine and healthcare | 1489 | 1355 | Kimi K3 |
| LMArena Text: legal and government | 1503 | 1368 | Kimi K3 |
| LMArena Text: business and finance | 1470 | 1328 | Kimi K3 |
| Neither model has a result on the other 3 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
| Benchmark | Kimi K3 | o1 | Leader |
|---|---|---|---|
| Design Arena: websites | 1336 | Not measured | Only Kimi K3 measured |
| Design Arena: UI components | 1345 | Not measured | Only Kimi K3 measured |
| Design Arena: game dev | 1361 | Not measured | Only Kimi K3 measured |
| Design Arena: data viz | 1350 | Not measured | Only Kimi K3 measured |
| Design Arena: 3D | 1388 | Not measured | Only Kimi K3 measured |
| Design Arena: all code categories | 1361 | Not measured | Only Kimi K3 measured |
| 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 index190
| Benchmark | Kimi K3 | o1 | Leader |
|---|---|---|---|
| Vals Index | 53.0% | Not measured | Only Kimi K3 measured |
| LiveBench data analysis | 78.7% | Not measured | Only Kimi K3 measured |
| Public Benefits Bench (Vals AI) | 68.2% | Not measured | Only Kimi K3 measured |
| 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 |
| IFBench | Not measured | 70.3% | Only o1 measured |
| Long context reasoning (AA-LCR) | 88.7% | 65.0% | Kimi K3 |
| DTBench | 91.2% | 74.7% | Kimi K3 |
| LMCA | 52.7% | 22.3% | Kimi K3 |
| Fiction.LiveBench | Not measured | 83.3% | Only o1 measured |
| Creative writing (Lech Mazur) | Not measured | 70.2% | Only o1 measured |
| Surface Evolver Bench | 95.0% | Not measured | Only Kimi K3 measured |
| Furniture assembly | 34.2% | Not measured | Only Kimi K3 measured |
| LMArena Text | 1476 | 1366 | Kimi K3 |
| LMArena Text: instruction following | 1485 | 1367 | Kimi K3 |
| LMArena Text: creative writing | 1457 | 1347 | Kimi K3 |
| LMArena Vision | Not measured | 1168 | Only o1 measured |
| LMArena Text: English | 1481 | 1372 | Kimi K3 |
| LMArena Text: non-English | 1466 | 1358 | Kimi K3 |
| LMArena Text: Chinese | 1529 | 1394 | Kimi K3 |
| LMArena Text: German | 1490 | 1337 | Kimi K3 |
| LMArena Text: Japanese | 1494 | 1346 | Kimi K3 |
| LMArena Text: Korean | 1460 | 1396 | Kimi K3 |
| LMArena Text: French | 1492 | 1344 | Kimi K3 |
| LMArena Text: Spanish | 1472 | 1345 | Kimi K3 |
| LMArena Text: Russian | 1485 | 1356 | Kimi K3 |
| LMArena Text: Polish | 1458 | Not measured | Only Kimi K3 measured |
| LMArena Text: multi-turn | 1489 | 1355 | Kimi K3 |
| LMArena Text: longer queries | 1494 | 1378 | Kimi K3 |
| LMArena Text: writing and language | 1471 | 1360 | Kimi K3 |
| LMArena Text: entertainment and media | 1453 | 1358 | Kimi K3 |
| LMArena Vision: English | Not measured | 1162 | Only o1 measured |
| LMArena Vision: Chinese | Not measured | 1235 | Only o1 measured |
| Neither model has a result on the other 12 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Kimi K3 | o1 | 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 | OpenAI o1 |
|---|---|---|
| Maker | Moonshot AI | OpenAI |
| Weights | Open weights | No public weights listed |
| Released | July 16, 2026 | December 17, 2024 |
| Context window | 1.05M | 200K |
| Input $/Mtok | $0.239 | $15.00 |
| Output $/Mtok | $11.936 | $60.00 |
| Coding index | 61.8 | 61.7 |
| 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 o1 for coding?
Kimi K3 and o1 are level for coding, 61.8 against 61.7 on the Vibe Coding Index, so price and context decide. o1 is neither cheaper nor larger in context, and leads no benchmark both models were measured on. Pick Kimi K3 when output tokens cost 5.0x less, or when the context window is larger, 1.05M against 200K tokens.
Which is cheaper, Kimi K3 or o1?
Kimi K3 costs $0.239 per million input tokens and $11.936 per million output tokens; o1 costs $15.00 and $60.00. Cost per solved task is known for Kimi K3 only.
Which has the bigger context window, Kimi K3 or o1?
Kimi K3, with 1.05M tokens against 200K.
How many benchmarks is the Kimi K3 vs o1 comparison based on?
49 benchmarks have a result for both models as of October 21, 2026. Kimi K3's coding index rests on 2 independent benchmarks and o1's on 1. Where only one model has a result, the page says so instead of naming a winner.