GLM 5.3 vs GLM 5.3 Flash
GLM 5.3 Verdict
- GLM 5.3 (max) and GLM 5.3 Flash are level on quality (60.0 vs 60.1).
- GLM 5.3 (max) is stronger in agents & tools, coding, human preference, maths.
- GLM 5.3 Flash is stronger in knowledge, reasoning, composite, long context, multimodal.
- GLM 5.3 Flash is 18× cheaper ($0.119 vs $2.15 per 1M blended).
- GLM 5.3 Flash streams 1.6× faster (107 vs 66 tokens per second).
| Metric | GLM 5.3 (max) | GLM 5.3 Flash |
|---|---|---|
| BenchLeader Index | 60.0 | 60.1 |
| Agents & tools score | 52.8 | 51.5 |
| Coding score | 64.3 | 64.0 |
| Human preference score | 68.9 | 67.6 |
| Knowledge score | 55.8 | 64.3 |
| Maths score | 60.0 | – |
| Reasoning score | 66.9 | 67.5 |
| Composite score | – | 58.2 |
| Long context score | – | 64.1 |
| Multimodal score | – | 65.5 |
| Blended price $/M | $2.15 | $0.119 |
| Output speed | 66 tok/s | 107 tok/s |
| Time to first answer | 33.5 s | 21.1 s |
| Context window | 1M | 1M |
| 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% | – |
| SciCode | 56.5% | 46.1% |
| WeirdML | 75.4% | – |
| ProofBench | 49.0% | – |
| Epoch Capabilities Index | – | 151.4 |
| LMArena Text | 1486 | 1475 |
| LMArena Hard Prompts | 1509 | 1497 |
| LMArena Coding | 1526 | 1524 |
| LMArena WebDev | 1614 | 1607 |
| LMArena Vision | – | 1296 |
| LMArena Agent | 2.6 | 1.9 |
| 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 |
| AA-LCR | – | 80.0% |
| AA-Omniscience | – | 7.5 |
| GPQA Diamond (AA) | – | 91.2% |
| Humanity's Last Exam (AA) | – | 39.9% |
| SciCode (AA) | – | 51.6% |
| 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 | – |
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 GLM 5.3 Flash: questions
- Is GLM 5.3 better than GLM 5.3 Flash?
- GLM 5.3 (max) and GLM 5.3 Flash are level on quality (60.0 vs 60.1). The BenchLeader Index combines every independent quality benchmark; GLM 5.3 Flash is ahead overall as of 2026-09-13, but check the category scores for your use.
- Is GLM 5.3 better than GLM 5.3 Flash for coding?
- GLM 5.3 scores higher in coding (64 vs 64 on the category index, where 50 is average).
- Is GLM 5.3 better than GLM 5.3 Flash for agentic tasks?
- GLM 5.3 scores higher in agentic tasks (53 vs 52 on the category index, where 50 is average).
- Which is cheaper, GLM 5.3 or GLM 5.3 Flash?
- GLM 5.3 Flash is cheaper: $0.119 against $2.15 per million tokens, blended at three input tokens per output token.
- Which is faster, GLM 5.3 or GLM 5.3 Flash?
- GLM 5.3 Flash streams faster: 107 against 66 output tokens per second.
- Which has the larger context window?
- Both accept 1M tokens of context.