GLM 5 Turbo vs GPT-5.5
GLM 5 Turbo 
GPT-5.5 Verdict
- GPT-5.5 leads on quality: 66.8 vs 58.4.
- GPT-5.5 is stronger in agents & tools, composite, instruction following, knowledge, long context, coding, human preference, multimodal, reasoning.
- GLM 5 Turbo is 5.9× cheaper ($1.90 vs $11.25 per 1M blended).
- GPT-5.5 streams 5.3× faster (96 vs 18 tokens per second).
| Metric | GLM 5 Turbo | GPT-5.5 |
|---|---|---|
| BenchLeader Index | 58.4 | 66.8 |
| Agents & tools score | 63.1 | 68.4 |
| Composite score | 62.9 | 78.2 |
| Instruction following score | 71.8 | 74.1 |
| Knowledge score | 56.6 | 74.2 |
| Long context score | 62.4 | 68.9 |
| Coding score | – | 57.2 |
| Human preference score | – | 67.7 |
| Multimodal score | – | 65.1 |
| Reasoning score | – | 70.0 |
| Blended price $/M | $1.90 | $11.25 |
| Output speed | 18 tok/s | 96 tok/s |
| Time to first answer | 7.9 s | 52.1 s |
| Context window | 200k | 1.1M |
| Terminal-Bench | – | 84.7% |
| SimpleBench | – | 69.0% |
| Remote Labor Index | – | 6.3% |
| APEX-Agents | – | 38.5% |
| FrontierCode | – | 43.0% |
| Epoch Capabilities Index | – | 159.1 |
| LMArena Text | – | 1476 |
| LMArena Hard Prompts | – | 1498 |
| LMArena Coding | – | 1509 |
| LMArena WebDev | – | 1458 |
| LMArena Vision | – | 1296 |
| LMArena Agent | – | 2.8 |
| AA Intelligence Index | 26.6 | 38.6 |
| IFBench | 73.2% | 75.8% |
| AA-LCR | 71.7% | 84.3% |
| MMMU-Pro | – | 79.9% |
| AA-Omniscience | -16.4 | 20.5 |
| Terminal-Bench Hard | 33.3% | 60.6% |
| GPQA Diamond (AA) | 84.8% | 93.5% |
| Humanity's Last Exam (AA) | 27.8% | 45.8% |
| SciCode (AA) | – | 55.8% |
| τ²-Bench Telecom (AA) | 98.5% | 93.9% |
| HiL-Bench | – | 39.7% |
| EQ-Bench 4 | – | 1315 |
| Kagi LLM Benchmark | – | 88.8% |
Data as of 2026-09-13. Best configuration of each model; every score links to its source on the model pages.
GLM 5 Turbo vs GPT-5.5: questions
- Is GLM 5 Turbo better than GPT-5.5?
- GPT-5.5 leads on quality: 66.8 vs 58.4. The BenchLeader Index combines every independent quality benchmark; GPT-5.5 is ahead overall as of 2026-09-13, but check the category scores for your use.
- Is GLM 5 Turbo better than GPT-5.5 for agentic tasks?
- GPT-5.5 scores higher in agentic tasks (68 vs 63 on the category index, where 50 is average).
- Which is cheaper, GLM 5 Turbo or GPT-5.5?
- GLM 5 Turbo is cheaper: $1.90 against $11.25 per million tokens, blended at three input tokens per output token.
- Which is faster, GLM 5 Turbo or GPT-5.5?
- GPT-5.5 streams faster: 96 against 18 output tokens per second.
- Which has the larger context window?
- GPT-5.5 accepts more context: 1.1M against 200k tokens.