GLM 5.3 Flash vs GPT-5.6 Sol
GLM 5.3 Flash 
GPT-5.6 Sol Verdict
- GPT-5.6 Sol (high) leads on quality: 68.2 vs 61.1.
- GLM 5.3 Flash is stronger in human preference, reasoning.
- GPT-5.6 Sol (high) is stronger in agents & tools, coding, composite, knowledge, long context, multimodal, instruction following.
- GLM 5.3 Flash is 67× cheaper ($0.119 vs $8.00 per 1M blended).
- GLM 5.3 Flash streams 1.5× faster (90 vs 59 tokens per second).
| Metric | GLM 5.3 Flash | GPT-5.6 Sol (high) |
|---|---|---|
| BenchLeader Index | 61.1 | 68.2 |
| Agents & tools score | 52.1 | 87.9 |
| Coding score | 64.3 | 72.4 |
| Composite score | 61.7 | 82.7 |
| Human preference score | 67.6 | – |
| Knowledge score | 67.7 | 73.8 |
| Long context score | 66.6 | 67.4 |
| Multimodal score | 65.5 | 66.4 |
| Reasoning score | 67.5 | 63.3 |
| Instruction following score | – | 67.8 |
| Blended price $/M | $0.119 | $8.00 |
| Output speed | 90 tok/s | 59 tok/s |
| Time to first answer | 24.9 s | 31.0 s |
| Context window | 1M | 1M |
| SciCode | 46.1% | 56.9% |
| WeirdML | – | 88.8% |
| 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 | 42.5 |
| IFBench | – | 69.2% |
| AA-LCR | 80.0% | 81.7% |
| MMMU-Pro | – | 81.8% |
| AA-Omniscience | 7.5 | 20.4 |
| Terminal-Bench Hard | – | 62.1% |
| GPQA Diamond (AA) | 91.2% | 92.8% |
| Humanity's Last Exam (AA) | 39.9% | 46.0% |
| SciCode (AA) | 51.6% | 57.8% |
| τ²-Bench Telecom (AA) | – | 83.3% |
| EnigmaEval | – | 37.1% |
| ARC-AGI-1 | – | 97.0% |
| ARC-AGI-2 | – | 85.4% |
| ARC-AGI-3 | – | 2.2% |
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 GPT-5.6 Sol: questions
- Is GLM 5.3 Flash better than GPT-5.6 Sol?
- GPT-5.6 Sol (high) leads on quality: 68.2 vs 61.1. The BenchLeader Index combines every independent quality benchmark; GPT-5.6 Sol (high) is ahead overall as of 2026-09-10, but check the category scores for your use.
- Is GLM 5.3 Flash better than GPT-5.6 Sol for coding?
- GPT-5.6 Sol scores higher in coding (72 vs 64 on the category index, where 50 is average).
- Is GLM 5.3 Flash better than GPT-5.6 Sol for agentic tasks?
- GPT-5.6 Sol scores higher in agentic tasks (88 vs 52 on the category index, where 50 is average).
- Which is cheaper, GLM 5.3 Flash or GPT-5.6 Sol?
- GLM 5.3 Flash is cheaper: $0.119 against $8.00 per million tokens, blended at three input tokens per output token.
- Which is faster, GLM 5.3 Flash or GPT-5.6 Sol?
- GLM 5.3 Flash streams faster: 90 against 59 output tokens per second.
- Which has the larger context window?
- Both accept 1M tokens of context.