GPT-5.4 Pro vs Qwen3.5 Plus 2026-04-20
GPT-5.4 Pro 
Qwen3.5 Plus 2026-04-20 Verdict
- GPT-5.4 Pro leads on quality: 64.3 vs 57.3.
- GPT-5.4 Pro is stronger in instruction following, knowledge, multimodal, reasoning.
- Qwen3.5 Plus 2026-04-20 (thinking) is stronger in coding, maths.
- Qwen3.5 Plus 2026-04-20 (thinking) is 52× cheaper ($1.29 vs $67.50 per 1M blended).
- Qwen3.5 Plus 2026-04-20 (thinking) streams 52.0× faster (52 vs 1 tokens per second).
| Metric | GPT-5.4 Pro | Qwen3.5 Plus 2026-04-20 (thinking) |
|---|---|---|
| BenchLeader Index | 64.3 | 57.3 |
| Instruction following score | 67.3 | – |
| Knowledge score | 73.6 | 60.5 |
| Multimodal score | 69.8 | – |
| Reasoning score | 75.3 | – |
| Coding score | – | 61.8 |
| Maths score | – | 60.6 |
| Blended price $/M | $67.50 | $1.29 |
| Output speed | 1 tok/s | 52 tok/s |
| Time to first answer | 6.3 s | 0.9 s |
| Context window | 1.1M | 1M |
| Humanity's Last Exam | 44.3% | – |
| SimpleBench | 74.1% | – |
| Epoch Capabilities Index | 158.9 | – |
| AIME (Vals) | – | 86.0% |
| LiveCodeBench | – | 85.3% |
| MMLU-Pro | – | 87.2% |
| LegalBench | – | 85.1% |
| CorpFin | – | 65.3% |
| MedQA | – | 95.2% |
| SWE-bench (Vals) | – | 71.2% |
| GPQA Diamond (Vals) | – | 87.4% |
| MultiChallenge | 69.2% | – |
| VISTA | 53.9% | – |
| MultiNRC | 62.3% | – |
| TutorBench | 56.6% | – |
Data as of 2026-09-13. Best configuration of each model; every score links to its source on the model pages.
GPT-5.4 Pro vs Qwen3.5 Plus 2026-04-20: questions
- Is GPT-5.4 Pro better than Qwen3.5 Plus 2026-04-20?
- GPT-5.4 Pro leads on quality: 64.3 vs 57.3. The BenchLeader Index combines every independent quality benchmark; GPT-5.4 Pro is ahead overall as of 2026-09-13, but check the category scores for your use.
- Which is cheaper, GPT-5.4 Pro or Qwen3.5 Plus 2026-04-20?
- Qwen3.5 Plus 2026-04-20 is cheaper: $1.29 against $67.50 per million tokens, blended at three input tokens per output token.
- Which is faster, GPT-5.4 Pro or Qwen3.5 Plus 2026-04-20?
- Qwen3.5 Plus 2026-04-20 streams faster: 52 against 1 output tokens per second.
- Which has the larger context window?
- GPT-5.4 Pro accepts more context: 1.1M against 1M tokens.