GLM 5.3 Flash vs Kimi K3
GLM 5.3 Flash 
Kimi K3 Verdict
- Kimi K3 leads on quality: 66.5 vs 61.1.
- GLM 5.3 Flash is stronger in multimodal, reasoning.
- Kimi K3 is stronger in agents & tools, coding, composite, human preference, knowledge, long context, maths.
- GLM 5.3 Flash is 50× cheaper ($0.119 vs $6.00 per 1M blended).
- GLM 5.3 Flash streams 2.4× faster (90 vs 38 tokens per second).
| Metric | GLM 5.3 Flash | Kimi K3 |
|---|---|---|
| BenchLeader Index | 61.1 | 66.5 |
| Agents & tools score | 52.1 | 67.4 |
| Coding score | 64.3 | 65.0 |
| Composite score | 61.7 | 74.2 |
| Human preference score | 67.6 | 71.2 |
| Knowledge score | 67.7 | 68.2 |
| Long context score | 66.6 | 71.1 |
| Multimodal score | 65.5 | 65.0 |
| Reasoning score | 67.5 | – |
| Maths score | – | 78.1 |
| Blended price $/M | $0.119 | $6.00 |
| Output speed | 90 tok/s | 38 tok/s |
| Time to first answer | 24.9 s | 56.3 s |
| Context window | 1M | 1.0M |
| SciCode | 46.1% | 58.7% |
| APEX-Agents | – | 39.3% |
| FrontierCode | – | 44.2% |
| ProofBench | – | 87.0% |
| Epoch Capabilities Index | 151.4 | 157.6 |
| LMArena Text | 1474 | – |
| LMArena Hard Prompts | 1496 | – |
| LMArena Coding | 1534 | – |
| LMArena WebDev | 1605 | – |
| LMArena Vision | 1296 | – |
| LMArena Agent | 2 | – |
| LiveBench | 71.6% | 79.2% |
| LiveBench Reasoning | 77.6% | 90.7% |
| LiveBench Coding | 79.0% | 81.5% |
| LiveBench Agentic Coding | 56.8% | 62.2% |
| LiveBench Mathematics | 81.2% | 84.4% |
| LiveBench Data Analysis | 76.4% | 78.7% |
| LiveBench Language | 77.3% | 85.5% |
| AA Intelligence Index | 41.9 | 43.8 |
| AA-LCR | 80.0% | 88.7% |
| MMMU-Pro | – | 80.5% |
| AA-Omniscience | 7.5 | 19.7 |
| GPQA Diamond (AA) | 91.2% | 93.5% |
| Humanity's Last Exam (AA) | 39.9% | 46.9% |
| SciCode (AA) | 51.6% | 59.5% |
| LegalBench | – | 86.0% |
| CorpFin | – | 71.6% |
| TaxEval | – | 75.7% |
| Terminal-Bench 2.1 (Vals) | – | 80.9% |
| SWE-bench (Vals) | – | 93.4% |
| GPQA Diamond (Vals) | – | 92.9% |
| Vals Index | – | 57.8 |
| EQ-Bench 4 | – | 1339 |
Data as of 2026-09-10. Best configuration of each model; every score links to its source on the model pages.
GLM 5.3 Flash vs Kimi K3: questions
- Is GLM 5.3 Flash better than Kimi K3?
- Kimi K3 leads on quality: 66.5 vs 61.1. The BenchLeader Index combines every independent quality benchmark; Kimi K3 is ahead overall as of 2026-09-10, but check the category scores for your use.
- Is GLM 5.3 Flash better than Kimi K3 for coding?
- Kimi K3 scores higher in coding (65 vs 64 on the category index, where 50 is average).
- Is GLM 5.3 Flash better than Kimi K3 for agentic tasks?
- Kimi K3 scores higher in agentic tasks (67 vs 52 on the category index, where 50 is average).
- Which is cheaper, GLM 5.3 Flash or Kimi K3?
- GLM 5.3 Flash is cheaper: $0.119 against $6.00 per million tokens, blended at three input tokens per output token.
- Which is faster, GLM 5.3 Flash or Kimi K3?
- GLM 5.3 Flash streams faster: 90 against 38 output tokens per second.
- Which has the larger context window?
- Kimi K3 accepts more context: 1.0M against 1M tokens.