GLM 5.3 Flash vs Grok 4.6
GLM 5.3 Flash 
Grok 4.6 Verdict
- Grok 4.6 (medium) leads on quality: 63.9 vs 61.1.
- GLM 5.3 Flash is stronger in agents & tools, coding, human preference, multimodal, reasoning.
- Grok 4.6 (medium) is stronger in composite, knowledge, long context.
- GLM 5.3 Flash is 25× cheaper ($0.119 vs $3.00 per 1M blended).
- GLM 5.3 Flash streams 1.7× faster (90 vs 53 tokens per second).
| Metric | GLM 5.3 Flash | Grok 4.6 (medium) |
|---|---|---|
| BenchLeader Index | 61.1 | 63.9 |
| Agents & tools score | 52.1 | – |
| Coding score | 64.3 | 64.1 |
| Composite score | 61.7 | 83.4 |
| Human preference score | 67.6 | – |
| Knowledge score | 67.7 | 77.5 |
| Long context score | 66.6 | 67.1 |
| Multimodal score | 65.5 | – |
| Reasoning score | 67.5 | 62.1 |
| Blended price $/M | $0.119 | $3.00 |
| Output speed | 90 tok/s | 53 tok/s |
| Time to first answer | 24.9 s | 33.4 s |
| Context window | 1M | 500k |
| SciCode | 46.1% | 54.6% |
| Epoch Capabilities Index | 151.4 | – |
| LMArena Text | 1474 | – |
| LMArena Hard Prompts | 1496 | – |
| LMArena Coding | 1534 | – |
| LMArena WebDev | 1605 | – |
| LMArena Vision | 1296 | – |
| LMArena Agent | 2 | – |
| LiveBench | 71.6% | – |
| LiveBench Reasoning | 77.6% | – |
| LiveBench Coding | 79.0% | – |
| LiveBench Agentic Coding | 56.8% | – |
| LiveBench Mathematics | 81.2% | – |
| LiveBench Data Analysis | 76.4% | – |
| LiveBench Language | 77.3% | – |
| AA Intelligence Index | 41.9 | 43.0 |
| AA-LCR | 80.0% | 81.0% |
| AA-Omniscience | 7.5 | 28 |
| GPQA Diamond (AA) | 91.2% | 93.5% |
| Humanity's Last Exam (AA) | 39.9% | 42.1% |
| SciCode (AA) | 51.6% | 55.9% |
| ARC-AGI-1 | – | 87.5% |
| ARC-AGI-2 | – | 61.3% |
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 Grok 4.6: questions
- Is GLM 5.3 Flash better than Grok 4.6?
- Grok 4.6 (medium) leads on quality: 63.9 vs 61.1. The BenchLeader Index combines every independent quality benchmark; Grok 4.6 (medium) is ahead overall as of 2026-09-10, but check the category scores for your use.
- Is GLM 5.3 Flash better than Grok 4.6 for coding?
- GLM 5.3 Flash scores higher in coding (64 vs 64 on the category index, where 50 is average).
- Which is cheaper, GLM 5.3 Flash or Grok 4.6?
- GLM 5.3 Flash is cheaper: $0.119 against $3.00 per million tokens, blended at three input tokens per output token.
- Which is faster, GLM 5.3 Flash or Grok 4.6?
- GLM 5.3 Flash streams faster: 90 against 53 output tokens per second.
- Which has the larger context window?
- GLM 5.3 Flash accepts more context: 1M against 500k tokens.