Kimi K2 0711 vs o3 Mini
Updated October 21, 2026. 27 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.
Decision reading
Pick Kimi K2 0711 for coding: it scores 64.7 on the Vibe Coding Index against 52.1 for o3 Mini.
Pick o3 Mini when the context window is larger, 200K against 131K tokens, or when what matters is Aider polyglot or LiveCodeBench (Vals AI), where it leads.
- Shared results
- 27
- Kimi K2 0711 only
- 9
- o3 Mini only
- 43
- Like-for-like categories
- 7 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
Kimi K2 0711
Kimi K2 0711 scores 64.7 against 52.1.
2 benchmarks behind each score
Intelligence
AA Intelligence Index
Kimi K2 0711
Kimi K2 0711 leads, 12.7 against 12.5.
Same board, both measured
Reasoning
GPQA Diamond
o3 Mini
o3 Mini leads, 75.5% against 71.5%.
Same board, both measured
Math
AIME
o3 Mini
o3 Mini leads, 86.5% against 62.7%.
Same board, both measured
Knowledge
MMLU Pro
Kimi K2 0711
Kimi K2 0711 leads, 79.4% against 78.7%.
Same board, both measured
Web design
Design Arena: websites
No call
Only Kimi K2 0711 has a Design Arena: websites result, 1050.
Directional only
Long documents
Listed context window
o3 Mini
o3 Mini takes 200K tokens against 131K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Kimi K2 0711
Kimi K2 0711 $0.0017, o3 Mini $0.0033 per turn.
List prices
At a glance
- Coding index
- Kimi K2 0711 64.7 from 2 benchmarks, o3 Mini 52.1 from 2 benchmarks.
- Widest category
- Agentic work, 29.8 points apart on average over 1 shared benchmark.
- Widest single gap
- τ²-Bench Telecom: Kimi K2 0711 61.1% against o3 Mini 31.3%, 29.8 points apart on a 0 to 100 scale.
- Output price
- Kimi K2 0711 $2.30 against o3 Mini $4.40 per million output tokens, 1.9x apart.
- Context window
- Kimi K2 0711 takes 131K tokens, o3 Mini 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 K2 0711 | Bars | o3 Mini | Ties |
|---|---|---|---|---|
| Coding | 3 | 4 | ||
| Intelligence | 1 | 1 | ||
| Agentic work | 1 | 0 | ||
| Reasoning | 1 | 3 | ||
| Math | 1 | 2 | ||
| Knowledge | 5 | 1 | ||
| General | 3 | 1 | ||
| All shared boards | 15 | 12 |
CodingLike-for-likeFour of these boards feed the Vibe Coding Index34
| Benchmark | Kimi K2 0711 | o3 Mini | Leader |
|---|---|---|---|
| Aider polyglot | 59.1% | 60.4% | o3 Mini |
| SWE-bench Verified | 71.2% | 42.4% | Kimi K2 0711 |
| SWE-bench Lite | Not measured | 32.3% | Only o3 Mini measured |
| LiveCodeBench (Vals AI) | 70.5% | 71.5% | o3 Mini |
| LiveCodeBench (Artificial Analysis run) | 55.6% | 73.4% | o3 Mini |
| SciCode | Not measured | 42.8% | Only o3 Mini measured |
| Terminal-Bench Hard (Artificial Analysis run) | 15.9% | 6.8% | Kimi K2 0711 |
| Terminal-Bench | 27.8% | Not measured | Only Kimi K2 0711 measured |
| GSO-Bench | 4.9% | 1.3% | Kimi K2 0711 |
| WeirdML | 39.4% | 43.7% | o3 Mini |
| Cybench | Not measured | 22.5% | Only o3 Mini measured |
| LMArena Text: coding | Not measured | 1378 | Only o3 Mini measured |
| LMArena Text: software and IT | Not measured | 1364 | Only o3 Mini measured |
| Neither model has a result on the other 25 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index11
| Benchmark | Kimi K2 0711 | o3 Mini | Leader |
|---|---|---|---|
| AA Intelligence Index | 12.7 | 12.5 | Kimi K2 0711 |
| Epoch Capabilities Index | 140.0 | 140.2 | o3 Mini |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Kimi K2 0711 | o3 Mini | Leader |
|---|---|---|---|
| τ²-Bench Telecom | 61.1% | 31.3% | Kimi K2 0711 |
| Neither model has a result on the other 38 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index13
| Benchmark | Kimi K2 0711 | o3 Mini | Leader |
|---|---|---|---|
| GPQA Diamond | 71.5% | 75.5% | o3 Mini |
| GPQA Diamond (Artificial Analysis run) | 76.6% | 77.3% | o3 Mini |
| Humanity's Last Exam (Artificial Analysis run) | 7.4% | 12.0% | o3 Mini |
| GPQA Diamond (Epoch AI run) | Not measured | 77.0% | Only o3 Mini measured |
| ARC-AGI | Not measured | 34.5% | Only o3 Mini measured |
| ARC-AGI-2 | Not measured | 3.0% | Only o3 Mini measured |
| SimpleBench | 26.3% | 22.8% | Kimi K2 0711 |
| Chess puzzles | Not measured | 15.0% | Only o3 Mini measured |
| Mystery game puzzles | Not measured | 7.0% | Only o3 Mini measured |
| LMArena Text: hard prompts | Not measured | 1365 | Only o3 Mini measured |
| LMArena Text: expert | Not measured | 1364 | Only o3 Mini measured |
| LMArena Text: hard prompts in English | Not measured | 1375 | Only o3 Mini measured |
| Neither model has a result on the other 9 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index12
| Benchmark | Kimi K2 0711 | o3 Mini | Leader |
|---|---|---|---|
| AIME | 62.7% | 86.5% | o3 Mini |
| MATH 500 (Vals AI) | 94.2% | 91.8% | Kimi K2 0711 |
| MGSM (Vals AI) | 91.0% | 91.3% | o3 Mini |
| AA Math Index | 57.0 | Not measured | Only Kimi K2 0711 measured |
| AIME 2025 (Artificial Analysis run) | 57.0% | Not measured | Only Kimi K2 0711 measured |
| OTIS Mock AIME | Not measured | 76.9% | Only o3 Mini measured |
| FrontierMath, tiers 1 to 3 | Not measured | 18.6% | Only o3 Mini measured |
| FrontierMath, tier 4 | Not measured | 0.0% | Only o3 Mini measured |
| MATH level 5 | Not measured | 96.5% | Only o3 Mini measured |
| LMArena Text: math | Not measured | 1396 | Only o3 Mini measured |
| LMArena Text: mathematical work | Not measured | 1399 | Only o3 Mini measured |
| Neither model has a result on the other 2 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index51
| Benchmark | Kimi K2 0711 | o3 Mini | Leader |
|---|---|---|---|
| MMLU Pro | 79.4% | 78.7% | Kimi K2 0711 |
| LegalBench (Vals AI) | 81.5% | 71.5% | Kimi K2 0711 |
| CorpFin (Vals AI) | 50.4% | 45.3% | Kimi K2 0711 |
| TaxEval (Vals AI) | 70.2% | 69.4% | Kimi K2 0711 |
| MedQA (Vals AI) | 84.0% | 94.8% | o3 Mini |
| MMLU Pro (Artificial Analysis run) | 82.4% | 80.2% | Kimi K2 0711 |
| SimpleQA Verified | Not measured | 15.3% | Only o3 Mini measured |
| LMArena Text: science | Not measured | 1339 | Only o3 Mini measured |
| LMArena Text: medicine and healthcare | Not measured | 1330 | Only o3 Mini measured |
| LMArena Text: legal and government | Not measured | 1328 | Only o3 Mini measured |
| LMArena Text: business and finance | Not measured | 1313 | Only o3 Mini measured |
| Neither model has a result on the other 6 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index5 boards, none shared
| Benchmark | Kimi K2 0711 | o3 Mini | Leader |
|---|---|---|---|
| Design Arena: websites | 1050 | Not measured | Only Kimi K2 0711 measured |
| Design Arena: UI components | 1030 | Not measured | Only Kimi K2 0711 measured |
| Design Arena: game dev | 974 | Not measured | Only Kimi K2 0711 measured |
| Design Arena: data viz | 1018 | Not measured | Only Kimi K2 0711 measured |
| Design Arena: all code categories | 1034 | Not measured | Only Kimi K2 0711 measured |
| Neither model has a result on the other 4 boards here | |||
GeneralLike-for-likePublic boards, shown as published, kept out of the index31
| Benchmark | Kimi K2 0711 | o3 Mini | Leader |
|---|---|---|---|
| IFBench | 41.5% | 67.1% | o3 Mini |
| Long context reasoning (AA-LCR) | 53.0% | 43.0% | Kimi K2 0711 |
| DTBench | Not measured | 68.8% | Only o3 Mini measured |
| LMCA | Not measured | 19.0% | Only o3 Mini measured |
| Fiction.LiveBench | 61.1% | 50.0% | Kimi K2 0711 |
| Creative writing (Lech Mazur) | 85.6% | 61.7% | Kimi K2 0711 |
| CL-bench | 11.9% | Not measured | Only Kimi K2 0711 measured |
| LMArena Text | Not measured | 1337 | Only o3 Mini measured |
| LMArena Text: instruction following | Not measured | 1337 | Only o3 Mini measured |
| LMArena Text: creative writing | Not measured | 1286 | Only o3 Mini measured |
| LMArena Text: English | Not measured | 1351 | Only o3 Mini measured |
| LMArena Text: non-English | Not measured | 1319 | Only o3 Mini measured |
| LMArena Text: Chinese | Not measured | 1379 | Only o3 Mini measured |
| LMArena Text: German | Not measured | 1303 | Only o3 Mini measured |
| LMArena Text: Japanese | Not measured | 1286 | Only o3 Mini measured |
| LMArena Text: Korean | Not measured | 1313 | Only o3 Mini measured |
| LMArena Text: French | Not measured | 1334 | Only o3 Mini measured |
| LMArena Text: Spanish | Not measured | 1321 | Only o3 Mini measured |
| LMArena Text: Russian | Not measured | 1304 | Only o3 Mini measured |
| LMArena Text: Polish | Not measured | 1294 | Only o3 Mini measured |
| LMArena Text: multi-turn | Not measured | 1320 | Only o3 Mini measured |
| LMArena Text: longer queries | Not measured | 1343 | Only o3 Mini measured |
| LMArena Text: writing and language | Not measured | 1313 | Only o3 Mini measured |
| LMArena Text: entertainment and media | Not measured | 1283 | Only o3 Mini measured |
| Neither model has a result on the other 22 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Kimi K2 0711 | o3 Mini | 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 K2 0711 costs less
Repository review
50K input + 3K output tokens
Kimi K2 0711 costs less
Agent loop
200K input + 10K output tokens
Kimi K2 0711 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 K2 0711 | OpenAI o3 Mini |
|---|---|---|
| Maker | Moonshot AI | OpenAI |
| Weights | Open weights | No public weights listed |
| Released | July 11, 2025 | January 31, 2025 |
| Context window | 131K | 200K |
| Input $/Mtok | $0.57 | $1.10 |
| Output $/Mtok | $2.30 | $4.40 |
| Coding index | 64.7 | 52.1 |
| Independent measurements behind it | 2 | 2 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Kimi K2 0711 better than o3 Mini for coding?
Pick Kimi K2 0711 for coding: it scores 64.7 on the Vibe Coding Index against 52.1 for o3 Mini. Pick o3 Mini when the context window is larger, 200K against 131K tokens, or when what matters is Aider polyglot or LiveCodeBench (Vals AI), where it leads.
Which is cheaper, Kimi K2 0711 or o3 Mini?
Kimi K2 0711 costs $0.57 per million input tokens and $2.30 per million output tokens; o3 Mini costs $1.10 and $4.40. Cost per solved task is known for neither of them.
Which has the bigger context window, Kimi K2 0711 or o3 Mini?
o3 Mini, with 200K tokens against 131K.
How many benchmarks is the Kimi K2 0711 vs o3 Mini comparison based on?
27 benchmarks have a result for both models as of October 21, 2026. Kimi K2 0711's coding index rests on 2 independent benchmarks and o3 Mini's on 2. Where only one model has a result, the page says so instead of naming a winner.