GLM-5.3-Flash vs Step 5 Preview
GLM-5.3-Flash 
Step 5 Preview Verdict
- Step 5 Preview leads on quality: 65.0 vs 63.9.
- GLM-5.3-Flash is stronger in agents & tools, coding, human preference, maths, multimodal.
- Step 5 Preview is stronger in composite, knowledge, long context, reasoning.
- GLM-5.3-Flash is 12× cheaper ($0.119 vs $1.43 per 1M blended).
| Metric | GLM-5.3-Flash | Step 5 Preview |
|---|---|---|
| BenchLeader Index | 63.9 | 65.0 |
| Agents & tools score | 68.0 | – |
| Coding score | 64.0 | – |
| Composite score | 61.7 | 84.4 |
| Human preference score | 67.6 | – |
| Knowledge score | 67.8 | 72.0 |
| Long context score | 66.5 | 70.8 |
| Maths score | 71.0 | – |
| Multimodal score | 65.3 | 60.8 |
| Reasoning score | 70.3 | 82.1 |
| Blended price $/M | $0.119 | $1.43 |
| Output speed | 98 tok/s | – |
| Time to first answer | 22.9 s | – |
| Context window | 1M | 1M |
| SciCode | 46.1% | – |
| Epoch Capabilities Index | 151.4 | – |
| LMArena Text | 1475 | – |
| LMArena Hard Prompts | 1498 | – |
| LMArena Coding | 1525 | – |
| LMArena WebDev | 1607 | – |
| LMArena Vision | 1299 | – |
| LMArena Agent | 1.1 | – |
| 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% | – |
| LiveBench Instruction Following | 52.8% | – |
| AA Intelligence Index | 41.9 | 43.6 |
| AA-LCR | 80.0% | 88.3% |
| MMMU-Pro | – | 76.4% |
| AA-Omniscience | 7.5 | 16.4 |
| GPQA Diamond (AA) | 91.2% | – |
| Humanity's Last Exam (AA) | 39.9% | 46.5% |
| SciCode (AA) | 51.6% | 58.9% |
| CritPt | 15.4% | 20.9% |
| GDPval (AA) | 57.8% | 53.6% |
| τ²-Bench Banking (AA) | 47.2% | – |
| LMArena Maths | 1513 | – |
| LMArena Creative Writing | 1435 | – |
| LMArena Instruction Following | 1471 | – |
| LMArena Multi-turn | 1475 | – |
| LMArena Longer Queries | 1476 | – |
Data as of 2026-09-19. Best configuration of each model; every score links to its source on the model pages.
GLM-5.3-Flash vs Step 5 Preview: questions
- Is GLM-5.3-Flash better than Step 5 Preview?
- Step 5 Preview leads on quality: 65.0 vs 63.9. The BenchLeader Index combines every independent quality benchmark; Step 5 Preview is ahead overall as of 2026-09-19, but check the category scores for your use.
- Which is cheaper, GLM-5.3-Flash or Step 5 Preview?
- GLM-5.3-Flash is cheaper: $0.119 against $1.43 per million tokens, blended at three input tokens per output token.
- Which has the larger context window?
- Both accept 1M tokens of context.