Model comparison
Claude 2.1 vs Kimi K3
Kimi K3 is the stronger model overall, scoring 59.5 to 25.2 on the Noometry Index.
Last verified . 6 shared benchmarks.
Summary
- They share 6 benchmarks with published results for both. Claude 2.1 scores higher in 0 categories and Kimi K3 in 4 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where Kimi K3 leads 74.2 to 10.2.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 1.9% for Claude 2.1 and 97.2% for Kimi K3.
- Kimi K3 has downloadable open weights; the other is API-only.
Side by side
| Claude 2.1 | Kimi K3 | |
|---|---|---|
| Provider | Anthropic | Moonshot AI |
| Noometry Index | 25.2 | 59.5 |
| Released | 2023-11-21 | 2026-07-16 |
| Weights | Proprietary | Open |
| Context window | — | 1.05M |
| Max output | — | 1.05M |
| Input $ / M tokens | — | $3 |
| Output $ / M tokens | — | $15 |
| Results tracked | 7 | 53 |
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Category by category
Coding Kimi K3 leads
Claude 2.1: 26.2 (#327), Kimi K3: 61.0 (#10)
| Benchmark | Claude 2.1 | Kimi K3 |
|---|---|---|
| WeirdML | 7.1% | 82.6% |
| DeepSWE | — | 68.5% |
| FrontierCode | — | 44.2% |
| LMArena WebDev | — | 1654 |
| FrontierSWE | — | 25.9% |
| SciCode | — | 59.5% |
| LMArena Coding | — | 1508 |
| ALE-Bench | — | 1,524 |
Agentic & Tool Use Not comparable
Claude 2.1: —, Kimi K3: 41.8 (#20)
| Benchmark | Claude 2.1 | Kimi K3 |
|---|---|---|
| APEX-Agents | — | 50.6% |
| τ²-bench Banking | — | 37.1% |
| PostTrainBench | — | 32% |
| GBAEval | — | 48.3% |
| GDP.pdf | — | 19% |
| Vending-Bench 2 | — | 5,165 |
Reasoning Kimi K3 leads
Claude 2.1: 21.4 (#221), Kimi K3: 63.0 (#17)
| Benchmark | Claude 2.1 | Kimi K3 |
|---|---|---|
| DTBench | 51% | 91.2% |
| Epoch Capabilities Index | 119.27 | 157.45 |
| ForecastBench | 54.2 | 61.1 |
| ARC-AGI-2 | — | 60.4% |
| SimpleBench | — | 60.7% |
| NYT Connections (extended) | — | 93.6% |
| ARC-AGI-1 | — | 94.5% |
| CritPt | — | 23.4% |
| Chess Puzzles | — | 39% |
| LMArena Hard Prompts | — | 1496 |
| Mystery Game Puzzles | — | 26% |
| LMCA | — | 52.7% |
| Surface Evolver Bench | — | 95% |
Math Kimi K3 leads
Claude 2.1: 10.2 (#315), Kimi K3: 74.2 (#16)
| Benchmark | Claude 2.1 | Kimi K3 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.9% | 97.2% |
| FrontierMath (Tiers 1-3) | — | 72.2% |
| FrontierMath Tier 4 | — | 39% |
| MathArena Final-Answer Competitions | — | 87.8% |
| ProofBench | — | 87% |
| LMArena Math | — | 1491 |
Knowledge Kimi K3 leads
Claude 2.1: 15.4 (#292), Kimi K3: 63.2 (#21)
| Benchmark | Claude 2.1 | Kimi K3 |
|---|---|---|
| GPQA Diamond | 33% | 93.1% |
| SimpleQA Verified | — | 50.6% |
| LMArena Expert | — | 1521 |
| MMLU | 73.5% | — |
Multimodal Not comparable
Claude 2.1: —, Kimi K3: 37.8 (#70)
| Benchmark | Claude 2.1 | Kimi K3 |
|---|---|---|
| Blueprint-Bench 2 | — | 29.5% |
| Furniture Assembly | — | 34.2% |
Multilingual Not comparable
Claude 2.1: —, Kimi K3: 56.3 (#21)
| Benchmark | Claude 2.1 | Kimi K3 |
|---|---|---|
| LMArena Non-English | — | 1466 |
| LMArena Chinese | — | 1529 |
| LMArena French | — | 1491 |
| LMArena German | — | 1488 |
| LMArena Japanese | — | 1487 |
| LMArena Korean | — | 1458 |
| LMArena Russian | — | 1482 |
| LMArena Spanish | — | 1472 |
Instruction Following Not comparable
Claude 2.1: —, Kimi K3: 77.7 (#14)
| Benchmark | Claude 2.1 | Kimi K3 |
|---|---|---|
| LMArena Instruction Following | — | 1483 |
Long Context Not comparable
Claude 2.1: —, Kimi K3: 45.8 (#29)
| Benchmark | Claude 2.1 | Kimi K3 |
|---|---|---|
| LMArena Longer Query | — | 1494 |
Writing & Preference Not comparable
Claude 2.1: —, Kimi K3: 76.6 (#4)
| Benchmark | Claude 2.1 | Kimi K3 |
|---|---|---|
| LMArena Text | — | 1476 |
| LMArena Creative Writing | — | 1454 |
| EQ-Bench Creative Writing | — | 2082 |
| EQ-Bench 4 | — | 1339 |
| LMArena Multi-Turn | — | 1488 |
Frequently asked questions
Is Claude 2.1 better than Kimi K3?
Kimi K3 is the stronger model overall, scoring 59.5 to 25.2 on the Noometry Index.
Is Claude 2.1 or Kimi K3 better for coding?
Kimi K3 scores higher on coding benchmarks: 61.0 versus 26.2 in the Noometry coding category.
How many benchmarks do Claude 2.1 and Kimi K3 share?
6 benchmarks have published results for both models. Claude 2.1 has 7 scored results on Noometry and Kimi K3 has 53.