GPT-5.5 Instant vs Qwen3 8
GPT-5.5 Instant 
Qwen3 8 Verdict
- Qwen3 8 (max) leads on quality: 63.6 vs 60.5.
- GPT-5.5 Instant is stronger in agents & tools, instruction following, knowledge.
- Qwen3 8 (max) is stronger in coding, composite, human preference, long context, maths, multimodal, reasoning.
- Qwen3 8 (max) is 4.2× cheaper ($2.67 vs $11.25 per 1M blended).
- GPT-5.5 Instant streams 3.4× faster (129 vs 38 tokens per second).
| Metric | GPT-5.5 Instant | Qwen3 8 (max) |
|---|---|---|
| BenchLeader Index | 60.5 | 63.6 |
| Agents & tools score | 70.7 | 56.0 |
| Coding score | 61.1 | 69.7 |
| Composite score | 62.9 | 70.9 |
| Human preference score | 67.5 | 68.3 |
| Instruction following score | 69.8 | – |
| Knowledge score | 69.4 | 62.3 |
| Long context score | 61.4 | 65.7 |
| Maths score | 42.5 | 62.4 |
| Multimodal score | 59.7 | 67.2 |
| Reasoning score | 62.6 | 68.1 |
| Blended price $/M | $11.25 | $2.67 |
| Output speed | 129 tok/s | 38 tok/s |
| Time to first answer | 16.8 s | 55.3 s |
| Context window | 400k | 1M |
| GPQA Diamond | 82.5% | – |
| FrontierMath Tiers 1–3 | 26.3% | – |
| FrontierMath Tier 4 | 2.4% | – |
| OTIS Mock AIME | 68.1% | – |
| SciCode | 48.6% | 52.9% |
| ProofBench | – | 58.0% |
| Epoch Capabilities Index | 142.5 | 156.6 |
| LMArena Text | 1474 | 1480 |
| LMArena Hard Prompts | 1491 | 1502 |
| LMArena Coding | 1514 | 1520 |
| LMArena WebDev | – | 1670 |
| LMArena Vision | 1251 | 1313 |
| LMArena Agent | – | 3.9 |
| LiveBench | – | 78.5% |
| LiveBench Reasoning | – | 88.2% |
| LiveBench Coding | – | 72.9% |
| LiveBench Agentic Coding | – | 64.7% |
| LiveBench Mathematics | – | 91.3% |
| LiveBench Data Analysis | – | 78.4% |
| LiveBench Language | – | 79.7% |
| AA Intelligence Index | 26.8 | 40.3 |
| IFBench | 71.5% | – |
| AA-LCR | 70.0% | 78.3% |
| MMMU-Pro | – | 82.3% |
| AA-Omniscience | 11.2 | 3.4 |
| Terminal-Bench Hard | 42.4% | – |
| GPQA Diamond (AA) | 84.7% | 92.7% |
| Humanity's Last Exam (AA) | 21.6% | 43.0% |
| SciCode (AA) | 52.5% | 53.2% |
| τ²-Bench Telecom (AA) | 49.4% | – |
| LiveCodeBench | – | 87.8% |
| MMLU-Pro | – | 88.6% |
| IOI | – | 73.0% |
| LegalBench | – | 83.6% |
| CorpFin | – | 65.8% |
| TaxEval | – | 75.5% |
| Terminal-Bench 2.1 (Vals) | – | 67.4% |
| SWE-bench (Vals) | – | 85.6% |
| GPQA Diamond (Vals) | – | 93.7% |
| Vals Index | – | 51.8 |
Data as of 2026-09-10. Best configuration of each model; every score links to its source on the model pages.
GPT-5.5 Instant vs Qwen3 8: questions
- Is GPT-5.5 Instant better than Qwen3 8?
- Qwen3 8 (max) leads on quality: 63.6 vs 60.5. The BenchLeader Index combines every independent quality benchmark; Qwen3 8 (max) is ahead overall as of 2026-09-10, but check the category scores for your use.
- Is GPT-5.5 Instant better than Qwen3 8 for coding?
- Qwen3 8 scores higher in coding (70 vs 61 on the category index, where 50 is average).
- Is GPT-5.5 Instant better than Qwen3 8 for agentic tasks?
- GPT-5.5 Instant scores higher in agentic tasks (71 vs 56 on the category index, where 50 is average).
- Which is cheaper, GPT-5.5 Instant or Qwen3 8?
- Qwen3 8 is cheaper: $2.67 against $11.25 per million tokens, blended at three input tokens per output token.
- Which is faster, GPT-5.5 Instant or Qwen3 8?
- GPT-5.5 Instant streams faster: 129 against 38 output tokens per second.
- Which has the larger context window?
- Qwen3 8 accepts more context: 1M against 400k tokens.