Model comparison
Kimi K3 vs Qwen3.5 Plus
Kimi K3 is the stronger model overall, scoring 59.5 to 42.9 on the Noometry Index. Qwen3.5 Plus costs 6.7× less per token, which makes it the better buy when Kimi K3's lead doesn't matter for your workload.
Last verified . 10 shared benchmarks.
Alibaba (Qwen)Summary
- They share 10 benchmarks with published results for both. Kimi K3 scores higher in 4 categories and Qwen3.5 Plus in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Kimi K3 leads 63.0 to 32.8.
- The biggest single-benchmark swing is SimpleQA Verified: 50.6% for Kimi K3 and 25.4% for Qwen3.5 Plus.
- Qwen3.5 Plus is cheaper at $0.40 / $2.40 per million input/output tokens, against $3 / $15 for Kimi K3.
- Kimi K3 accepts more context: 1.05M tokens versus 1M.
- Kimi K3 has downloadable open weights; the other is API-only.
Side by side
| Kimi K3 | Qwen3.5 Plus | |
|---|---|---|
| Provider | Moonshot AI | Alibaba (Qwen) |
| Noometry Index | 59.5 | 42.9 |
| Released | 2026-07-16 | 2026-02-16 |
| Weights | Open | Proprietary |
| Context window | 1.05M | 1M |
| Max output | 1.05M | 66K |
| Input $ / M tokens | $3 | $0.40 |
| Output $ / M tokens | $15 | $2.40 |
| Results tracked | 53 | 15 |
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Category by category
Coding Not comparable
Kimi K3: 61.0 (#10), Qwen3.5 Plus: —
| Benchmark | Kimi K3 | Qwen3.5 Plus |
|---|---|---|
| ALE-Bench | 1,524 | 621.92 |
| DeepSWE | 68.5% | — |
| FrontierCode | 44.2% | — |
| LMArena WebDev | 1654 | — |
| FrontierSWE | 25.9% | — |
| SciCode | 59.5% | — |
| WeirdML | 82.6% | — |
| LMArena Coding | 1508 | — |
Agentic & Tool Use Not comparable
Kimi K3: 41.8 (#20), Qwen3.5 Plus: —
| Benchmark | Kimi K3 | Qwen3.5 Plus |
|---|---|---|
| Vending-Bench 2 | 5,165 | 0.54 |
| APEX-Agents | 50.6% | — |
| τ²-bench Banking | 37.1% | — |
| PostTrainBench | 32% | — |
| GBAEval | 48.3% | — |
| GDP.pdf | 19% | — |
Reasoning Kimi K3 leads
Kimi K3: 63.0 (#17), Qwen3.5 Plus: 32.8 (#74)
| Benchmark | Kimi K3 | Qwen3.5 Plus |
|---|---|---|
| Chess Puzzles | 39% | 22% |
| Mystery Game Puzzles | 26% | 17% |
| DTBench | 91.2% | 80.5% |
| LMCA | 52.7% | 36.4% |
| Epoch Capabilities Index | 157.45 | 146.78 |
| ARC-AGI-2 | 60.4% | — |
| SimpleBench | 60.7% | — |
| NYT Connections (extended) | 93.6% | — |
| ARC-AGI-1 | 94.5% | — |
| CritPt | 23.4% | — |
| LMArena Hard Prompts | 1496 | — |
| Surface Evolver Bench | 95% | — |
| ForecastBench | 61.1 | — |
Math Kimi K3 leads
Kimi K3: 74.2 (#16), Qwen3.5 Plus: 49.6 (#61)
| Benchmark | Kimi K3 | Qwen3.5 Plus |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 97.2% | 86.7% |
| FrontierMath (Tiers 1-3) | 72.2% | — |
| FrontierMath Tier 4 | 39% | — |
| MathArena Final-Answer Competitions | 87.8% | — |
| ProofBench | 87% | — |
| LMArena Math | 1491 | — |
| FrontierMath (Feb 2025 set) | — | 21% |
| FrontierMath Tier 4 (v1) | — | 2.1% |
Knowledge Kimi K3 leads
Kimi K3: 63.2 (#21), Qwen3.5 Plus: 46.0 (#83)
| Benchmark | Kimi K3 | Qwen3.5 Plus |
|---|---|---|
| GPQA Diamond | 93.1% | 84.8% |
| SimpleQA Verified | 50.6% | 25.4% |
| Vectara Hallucination Rate | — | 10.7% |
| LMArena Expert | 1521 | — |
Multimodal Not comparable
Kimi K3: 37.8 (#70), Qwen3.5 Plus: —
| Benchmark | Kimi K3 | Qwen3.5 Plus |
|---|---|---|
| Blueprint-Bench 2 | 29.5% | — |
| Furniture Assembly | 34.2% | — |
Multilingual Not comparable
Kimi K3: 56.3 (#21), Qwen3.5 Plus: —
| Benchmark | Kimi K3 | Qwen3.5 Plus |
|---|---|---|
| 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
Kimi K3: 77.7 (#14), Qwen3.5 Plus: —
| Benchmark | Kimi K3 | Qwen3.5 Plus |
|---|---|---|
| LMArena Instruction Following | 1483 | — |
Long Context Kimi K3 leads
Kimi K3: 45.8 (#29), Qwen3.5 Plus: 43.0 (#113)
| Benchmark | Kimi K3 | Qwen3.5 Plus |
|---|---|---|
| CL-bench | — | 19.8% |
| CL-bench Life | — | 12.4% |
| LMArena Longer Query | 1494 | — |
Writing & Preference Not comparable
Kimi K3: 76.6 (#4), Qwen3.5 Plus: —
| Benchmark | Kimi K3 | Qwen3.5 Plus |
|---|---|---|
| LMArena Text | 1476 | — |
| LMArena Creative Writing | 1454 | — |
| EQ-Bench Creative Writing | 2082 | — |
| EQ-Bench 4 | 1339 | — |
| LMArena Multi-Turn | 1488 | — |
Frequently asked questions
Is Kimi K3 better than Qwen3.5 Plus?
Kimi K3 is the stronger model overall, scoring 59.5 to 42.9 on the Noometry Index. Qwen3.5 Plus costs 6.7× less per token, which makes it the better buy when Kimi K3's lead doesn't matter for your workload.
Which is cheaper, Kimi K3 or Qwen3.5 Plus?
Qwen3.5 Plus is cheaper. It lists at $0.40 per million input tokens and $2.40 per million output tokens; Kimi K3 lists at $3 and $15.
Which has the bigger context window?
Kimi K3 does, with 1.05M tokens against 1M.
How many benchmarks do Kimi K3 and Qwen3.5 Plus share?
10 benchmarks have published results for both models. Kimi K3 has 53 scored results on Noometry and Qwen3.5 Plus has 15.