GLM 5.3 vs Grok 4.5
GLM 5.3 
Grok 4.5 Verdict
- Grok 4.5 leads on quality: 62.4 vs 60.0.
- GLM 5.3 (max) is stronger in coding, human preference, maths.
- Grok 4.5 is stronger in agents & tools, knowledge, reasoning, composite, long context, multimodal.
- GLM 5.3 (max) is 1.4× cheaper ($2.15 vs $3.00 per 1M blended).
| Metric | GLM 5.3 (max) | Grok 4.5 |
|---|---|---|
| BenchLeader Index | 60.0 | 62.4 |
| Agents & tools score | 52.8 | 58.4 |
| Coding score | 64.3 | 59.6 |
| Human preference score | 68.9 | 66.9 |
| Knowledge score | 55.8 | 72.8 |
| Maths score | 60.0 | – |
| Reasoning score | 66.9 | 69.1 |
| Composite score | – | 62.8 |
| Long context score | – | 63.7 |
| Multimodal score | – | 64.3 |
| Blended price $/M | $2.15 | $3.00 |
| Output speed | 66 tok/s | 56 tok/s |
| Time to first answer | 33.5 s | 6.6 s |
| Context window | 1M | 500k |
| GPQA Diamond | 90.9% | – |
| FrontierMath Tiers 1–3 | 68.8% | – |
| FrontierMath Tier 4 | 29.3% | – |
| OTIS Mock AIME | 91.1% | – |
| SimpleQA Verified | 41.0% | – |
| Terminal-Bench | 41.8% | – |
| SimpleBench | – | 70.0% |
| SciCode | 56.5% | – |
| WeirdML | 75.4% | 46.4% |
| APEX-Agents | – | 34.2% |
| FrontierCode | – | 42.4% |
| ProofBench | 49.0% | – |
| Epoch Capabilities Index | – | 153.9 |
| LMArena Text | 1486 | 1469 |
| LMArena Hard Prompts | 1509 | 1493 |
| LMArena Coding | 1526 | 1519 |
| LMArena WebDev | 1614 | 1555 |
| LMArena Vision | – | 1291 |
| LMArena Agent | 2.6 | 3.8 |
| LiveBench | – | 75.8% |
| LiveBench Reasoning | – | 87.2% |
| LiveBench Coding | – | 68.6% |
| LiveBench Agentic Coding | – | 56.5% |
| LiveBench Mathematics | – | 90.8% |
| LiveBench Data Analysis | – | 73.0% |
| LiveBench Language | – | 82.8% |
| AA Intelligence Index | – | 39.1 |
| AA-LCR | – | 79.3% |
| MMMU-Pro | – | 80.4% |
| AA-Omniscience | – | 25.3 |
| GPQA Diamond (AA) | – | 93.1% |
| Humanity's Last Exam (AA) | – | 42.7% |
| SciCode (AA) | – | 55.0% |
| LiveCodeBench | 80.5% | – |
| MMLU-Pro | 86.8% | – |
| IOI | 68.4% | – |
| LegalBench | 84.8% | – |
| TaxEval | 72.4% | – |
| Terminal-Bench 2.1 (Vals) | 71.5% | – |
| SWE-bench (Vals) | 95.4% | – |
| GPQA Diamond (Vals) | 88.1% | – |
| Vals Index | 57.0 | – |
| Kagi LLM Benchmark | – | 83.5% |
Data as of 2026-09-13. Best configuration of each model; every score links to its source on the model pages.
GLM 5.3 vs Grok 4.5: questions
- Is GLM 5.3 better than Grok 4.5?
- Grok 4.5 leads on quality: 62.4 vs 60.0. The BenchLeader Index combines every independent quality benchmark; Grok 4.5 is ahead overall as of 2026-09-13, but check the category scores for your use.
- Is GLM 5.3 better than Grok 4.5 for coding?
- GLM 5.3 scores higher in coding (64 vs 60 on the category index, where 50 is average).
- Is GLM 5.3 better than Grok 4.5 for agentic tasks?
- Grok 4.5 scores higher in agentic tasks (58 vs 53 on the category index, where 50 is average).
- Which is cheaper, GLM 5.3 or Grok 4.5?
- GLM 5.3 is cheaper: $2.15 against $3.00 per million tokens, blended at three input tokens per output token.
- Which is faster, GLM 5.3 or Grok 4.5?
- GLM 5.3 streams faster: 66 against 56 output tokens per second.
- Which has the larger context window?
- GLM 5.3 accepts more context: 1M against 500k tokens.