GPT-6 Astra vs Qwen3.5 Plus 2026-04-20
GPT-6 Astra 
Qwen3.5 Plus 2026-04-20 Verdict
- GPT-6 Astra (max) leads on quality: 70.5 vs 57.3.
- GPT-6 Astra (max) is stronger in agents & tools, coding, composite, human preference, knowledge, maths, reasoning.
- Qwen3.5 Plus 2026-04-20 (thinking) is 16× cheaper ($1.29 vs $20.00 per 1M blended).
| Metric | GPT-6 Astra (max) | Qwen3.5 Plus 2026-04-20 (thinking) |
|---|---|---|
| BenchLeader Index | 70.5 | 57.3 |
| Agents & tools score | 68.2 | – |
| Coding score | 77.3 | 61.8 |
| Composite score | 72.9 | – |
| Human preference score | 67.9 | – |
| Knowledge score | 80.0 | 60.5 |
| Maths score | 77.2 | 60.6 |
| Reasoning score | 72.7 | – |
| Blended price $/M | $20.00 | $1.29 |
| Output speed | 60 tok/s | 52 tok/s |
| Time to first answer | 321.0 s | 0.9 s |
| Context window | 1.1M | 1M |
| GPQA Diamond | 95.8% | – |
| FrontierMath Tiers 1–3 | 93.7% | – |
| FrontierMath Tier 4 | 97.6% | – |
| OTIS Mock AIME | 100.0% | – |
| SimpleQA Verified | 75.6% | – |
| Terminal-Bench | 58.2% | – |
| SciCode | 56.5% | – |
| FrontierCode | 53.3% | – |
| LMArena Text | 1478 | – |
| LMArena Hard Prompts | 1495 | – |
| LMArena Coding | 1537 | – |
| LMArena WebDev | 1800 | – |
| LMArena Agent | 12.4 | – |
| LiveBench | 82.2% | – |
| LiveBench Reasoning | 92.7% | – |
| LiveBench Coding | 80.4% | – |
| LiveBench Agentic Coding | 57.3% | – |
| LiveBench Mathematics | 96.8% | – |
| LiveBench Data Analysis | 83.0% | – |
| LiveBench Language | 89.4% | – |
| AIME (Vals) | – | 86.0% |
| LiveCodeBench | – | 85.3% |
| MMLU-Pro | – | 87.2% |
| IOI | 100.0% | – |
| LegalBench | – | 85.1% |
| CorpFin | – | 65.3% |
| MedQA | – | 95.2% |
| Terminal-Bench 2.1 (Vals) | 87.3% | – |
| SWE-bench (Vals) | – | 71.2% |
| GPQA Diamond (Vals) | – | 87.4% |
| Vals Index | 66.6 | – |
| ARC-AGI-1 | 97.5% | – |
| ARC-AGI-2 | 95.0% | – |
| ARC-AGI-3 | 98.6% | – |
Data as of 2026-09-13. Best configuration of each model; every score links to its source on the model pages.
GPT-6 Astra vs Qwen3.5 Plus 2026-04-20: questions
- Is GPT-6 Astra better than Qwen3.5 Plus 2026-04-20?
- GPT-6 Astra (max) leads on quality: 70.5 vs 57.3. The BenchLeader Index combines every independent quality benchmark; GPT-6 Astra (max) is ahead overall as of 2026-09-13, but check the category scores for your use.
- Is GPT-6 Astra better than Qwen3.5 Plus 2026-04-20 for coding?
- GPT-6 Astra scores higher in coding (77 vs 62 on the category index, where 50 is average).
- Which is cheaper, GPT-6 Astra or Qwen3.5 Plus 2026-04-20?
- Qwen3.5 Plus 2026-04-20 is cheaper: $1.29 against $20.00 per million tokens, blended at three input tokens per output token.
- Which is faster, GPT-6 Astra or Qwen3.5 Plus 2026-04-20?
- GPT-6 Astra streams faster: 60 against 52 output tokens per second.
- Which has the larger context window?
- GPT-6 Astra accepts more context: 1.1M against 1M tokens.