Model comparison
Claude 3 Opus vs Kimi K3
Kimi K3 is the stronger model overall, scoring 59.5 to 29.5 on the Noometry Index.
Last verified . 27 shared benchmarks.
Summary
- They share 27 benchmarks with published results for both. Claude 3 Opus scores higher in 0 categories and Kimi K3 in 10 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in math, where Kimi K3 leads 74.2 to 14.8.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 4.7% for Claude 3 Opus and 97.2% for Kimi K3.
- Kimi K3 has downloadable open weights; the other is API-only.
Side by side
| Claude 3 Opus | Kimi K3 | |
|---|---|---|
| Provider | Anthropic | Moonshot AI |
| Noometry Index | 29.5 | 59.5 |
| Released | 2024-02-29 | 2026-07-16 |
| Weights | Proprietary | Open |
| Context window | — | 1.05M |
| Max output | — | 1.05M |
| Input $ / M tokens | — | $3 |
| Output $ / M tokens | — | $15 |
| Results tracked | 46 | 53 |
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Category by category
Coding Kimi K3 leads
Claude 3 Opus: 32.9 (#267), Kimi K3: 61.0 (#10)
| Benchmark | Claude 3 Opus | Kimi K3 |
|---|---|---|
| WeirdML | 19.2% | 82.6% |
| LMArena Coding | 1264 | 1508 |
| DeepSWE | — | 68.5% |
| FrontierCode | — | 44.2% |
| LMArena WebDev | — | 1654 |
| FrontierSWE | — | 25.9% |
| SciCode | — | 59.5% |
| BigCodeBench Instruct | 45.5% | — |
| LiveBench Coding | 38.6% | — |
| BigCodeBench Complete | 57.4% | — |
| ALE-Bench | — | 1,524 |
| HumanEval+ | 77.4% | — |
| MBPP+ | 73.3% | — |
Agentic & Tool Use Kimi K3 leads
Claude 3 Opus: 24.6 (#116), Kimi K3: 41.8 (#20)
| Benchmark | Claude 3 Opus | Kimi K3 |
|---|---|---|
| APEX-Agents | — | 50.6% |
| τ²-bench Banking | — | 37.1% |
| Cybench | 10% | — |
| PostTrainBench | — | 32% |
| GBAEval | — | 48.3% |
| GDP.pdf | — | 19% |
| METR Time Horizons | 29.5% | — |
| Vending-Bench 2 | — | 5,165 |
Reasoning Kimi K3 leads
Claude 3 Opus: 14.6 (#324), Kimi K3: 63.0 (#17)
| Benchmark | Claude 3 Opus | Kimi K3 |
|---|---|---|
| SimpleBench | 23.5% | 60.7% |
| Chess Puzzles | 5% | 39% |
| LMArena Hard Prompts | 1245 | 1496 |
| DTBench | 61.6% | 91.2% |
| LMCA | 17% | 52.7% |
| Epoch Capabilities Index | 126.91 | 157.45 |
| ForecastBench | 58.4 | 61.1 |
| ARC-AGI-2 | — | 60.4% |
| NYT Connections (extended) | — | 93.6% |
| ARC-AGI-1 | — | 94.5% |
| CritPt | — | 23.4% |
| EnigmaEval | 0.8% | — |
| LiveBench Reasoning | 40.6% | — |
| Mystery Game Puzzles | — | 26% |
| LiveBench Data Analysis | 57.9% | — |
| Surface Evolver Bench | — | 95% |
| LiveBench | 49.2% | — |
| WinoGrande | 88.5% | — |
Math Kimi K3 leads
Claude 3 Opus: 14.8 (#299), Kimi K3: 74.2 (#16)
| Benchmark | Claude 3 Opus | Kimi K3 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 4.7% | 97.2% |
| LMArena Math | 1273 | 1491 |
| FrontierMath (Tiers 1-3) | — | 72.2% |
| FrontierMath Tier 4 | — | 39% |
| MathArena Final-Answer Competitions | — | 87.8% |
| ProofBench | — | 87% |
| LiveBench Math | 43.6% | — |
| MATH Level 5 | 37.5% | — |
Knowledge Kimi K3 leads
Claude 3 Opus: 24.5 (#267), Kimi K3: 63.2 (#21)
| Benchmark | Claude 3 Opus | Kimi K3 |
|---|---|---|
| GPQA Diamond | 47.2% | 93.1% |
| SimpleQA Verified | 12.6% | 50.6% |
| LMArena Expert | 1223 | 1521 |
| Confabulations | 22.7% | — |
| MMLU | 84.6% | — |
Multimodal Kimi K3 leads
Claude 3 Opus: 27.1 (#116), Kimi K3: 37.8 (#70)
| Benchmark | Claude 3 Opus | Kimi K3 |
|---|---|---|
| LMArena Vision | 1023 | — |
| Blueprint-Bench 2 | — | 29.5% |
| Furniture Assembly | — | 34.2% |
Multilingual Kimi K3 leads
Claude 3 Opus: 41.4 (#207), Kimi K3: 56.3 (#21)
| Benchmark | Claude 3 Opus | Kimi K3 |
|---|---|---|
| LMArena Non-English | 1258 | 1466 |
| LMArena Chinese | 1248 | 1529 |
| LMArena French | 1275 | 1491 |
| LMArena German | 1258 | 1488 |
| LMArena Japanese | 1204 | 1487 |
| LMArena Korean | 1187 | 1458 |
| LMArena Russian | 1280 | 1482 |
| LMArena Spanish | 1246 | 1472 |
Instruction Following Kimi K3 leads
Claude 3 Opus: 64.1 (#228), Kimi K3: 77.7 (#14)
| Benchmark | Claude 3 Opus | Kimi K3 |
|---|---|---|
| LMArena Instruction Following | 1248 | 1483 |
| LiveBench Instruction Following | 63.9% | — |
Long Context Kimi K3 leads
Claude 3 Opus: 38.2 (#202), Kimi K3: 45.8 (#29)
| Benchmark | Claude 3 Opus | Kimi K3 |
|---|---|---|
| LMArena Longer Query | 1259 | 1494 |
Writing & Preference Kimi K3 leads
Claude 3 Opus: 47.2 (#213), Kimi K3: 76.6 (#4)
| Benchmark | Claude 3 Opus | Kimi K3 |
|---|---|---|
| LMArena Text | 1262 | 1476 |
| LMArena Creative Writing | 1235 | 1454 |
| LMArena Multi-Turn | 1275 | 1488 |
| EQ-Bench Creative Writing | — | 2082 |
| EQ-Bench 4 | — | 1339 |
| LiveBench Language | 50.4% | — |
Frequently asked questions
Is Claude 3 Opus better than Kimi K3?
Kimi K3 is the stronger model overall, scoring 59.5 to 29.5 on the Noometry Index.
Is Claude 3 Opus or Kimi K3 better for coding?
Kimi K3 scores higher on coding benchmarks: 61.0 versus 32.9 in the Noometry coding category.
How many benchmarks do Claude 3 Opus and Kimi K3 share?
27 benchmarks have published results for both models. Claude 3 Opus has 46 scored results on Noometry and Kimi K3 has 53.