GPT-5.5 vs Qwen3.5 397B A17B
GPT-5.5 
Qwen3.5 397B A17B Verdict
- GPT-5.5 leads on quality: 66.7 vs 58.7.
- GPT-5.5 is stronger in coding, composite, human preference, knowledge, long context, multimodal, reasoning.
- Qwen3.5 397B A17B is stronger in agents & tools, instruction following, maths.
- Qwen3.5 397B A17B is 29× cheaper ($0.387 vs $11.25 per 1M blended).
| Metric | GPT-5.5 | Qwen3.5 397B A17B |
|---|---|---|
| BenchLeader Index | 66.7 | 58.7 |
| Agents & tools score | 68.5 | 69.4 |
| Coding score | 57.2 | 51.7 |
| Composite score | 77.8 | 53.1 |
| Human preference score | 67.9 | 63.6 |
| Instruction following score | 73.6 | 76.1 |
| Knowledge score | 73.9 | 49.5 |
| Long context score | 68.8 | 65.2 |
| Multimodal score | 64.9 | 61.6 |
| Reasoning score | 70.1 | 63.0 |
| Maths score | – | 50.1 |
| Blended price $/M | $11.25 | $0.387 |
| Output speed | 85 tok/s | 78 tok/s |
| Time to first answer | 58.6 s | 42.7 s |
| Context window | 1.1M | 262k |
| GPQA Diamond | – | 85.9% |
| FrontierMath Tiers 1–3 | – | 29.5% |
| OTIS Mock AIME | – | 88.9% |
| Terminal-Bench | 84.7% | – |
| SimpleBench | 69.0% | – |
| Remote Labor Index | 6.3% | – |
| APEX-Agents | 38.5% | – |
| FrontierCode | 43.0% | – |
| Epoch Capabilities Index | 159.1 | 147.0 |
| LMArena Text | 1477 | 1441 |
| LMArena Hard Prompts | 1498 | 1463 |
| LMArena Coding | 1509 | 1491 |
| LMArena WebDev | 1458 | 1399 |
| LMArena Vision | 1296 | 1265 |
| LMArena Agent | 3 | – |
| AA Intelligence Index | 38.6 | 19.1 |
| IFBench | 75.8% | 78.8% |
| AA-LCR | 84.3% | 77.3% |
| MMMU-Pro | 79.9% | 77.3% |
| AA-Omniscience | 20.5 | -30.8 |
| Terminal-Bench Hard | 60.6% | 40.9% |
| GPQA Diamond (AA) | 93.5% | 89.3% |
| Humanity's Last Exam (AA) | 45.8% | 29.0% |
| SciCode (AA) | 55.8% | 44.8% |
| τ²-Bench Telecom (AA) | 93.9% | 95.6% |
| AIME 2026 | – | 94.2% |
| HMMT February 2026 | – | 87.9% |
| HiL-Bench | 39.7% | – |
| EQ-Bench 4 | 1315 | – |
| Kagi LLM Benchmark | 88.8% | – |
Data as of 2026-09-10. Best configuration of each model; every score links to its source on the model pages.
GPT-5.5 vs Qwen3.5 397B A17B: questions
- Is GPT-5.5 better than Qwen3.5 397B A17B?
- GPT-5.5 leads on quality: 66.7 vs 58.7. The BenchLeader Index combines every independent quality benchmark; GPT-5.5 is ahead overall as of 2026-09-10, but check the category scores for your use.
- Is GPT-5.5 better than Qwen3.5 397B A17B for coding?
- GPT-5.5 scores higher in coding (57 vs 52 on the category index, where 50 is average).
- Is GPT-5.5 better than Qwen3.5 397B A17B for agentic tasks?
- Qwen3.5 397B A17B scores higher in agentic tasks (69 vs 69 on the category index, where 50 is average).
- Which is cheaper, GPT-5.5 or Qwen3.5 397B A17B?
- Qwen3.5 397B A17B is cheaper: $0.387 against $11.25 per million tokens, blended at three input tokens per output token.
- Which is faster, GPT-5.5 or Qwen3.5 397B A17B?
- GPT-5.5 streams faster: 85 against 78 output tokens per second.
- Which has the larger context window?
- GPT-5.5 accepts more context: 1.1M against 262k tokens.