GPT-5.2-Codex vs Qwen3 6
GPT-5.2-Codex 
Qwen3 6 Verdict
- Qwen3 6 (max) leads on quality: 63.3 vs 60.8.
- GPT-5.2-Codex is stronger in instruction following, long context, multimodal.
- Qwen3 6 (max) is stronger in agents & tools, coding, composite, knowledge, human preference, maths, reasoning.
- Qwen3 6 (max) is 1.6× cheaper ($2.96 vs $4.81 per 1M blended).
- Qwen3 6 (max) streams 2.4× faster (59 vs 25 tokens per second).
| Metric | GPT-5.2-Codex | Qwen3 6 (max) |
|---|---|---|
| BenchLeader Index | 60.8 | 63.3 |
| Agents & tools score | 63.5 | 72.0 |
| Coding score | 55.7 | 58.2 |
| Composite score | 56.8 | 64.9 |
| Instruction following score | 75.1 | 74.2 |
| Knowledge score | 63.1 | 64.0 |
| Long context score | 67.8 | 66.9 |
| Multimodal score | 60.7 | – |
| Human preference score | – | 65.9 |
| Maths score | – | 64.2 |
| Reasoning score | – | 63.2 |
| Blended price $/M | $4.81 | $2.96 |
| Output speed | 25 tok/s | 59 tok/s |
| Time to first answer | 6.7 s | 38.5 s |
| Context window | 400k | 246k |
| GPQA Diamond | – | 87.4% |
| OTIS Mock AIME | – | 91.1% |
| SWE-bench Verified (Epoch) | – | 76.7% |
| SimpleQA Verified | – | 52.0% |
| Terminal-Bench | 66.5% | – |
| SimpleBench | – | 63.0% |
| APEX-Agents | 27.6% | – |
| Epoch Capabilities Index | – | 149.3 |
| LMArena Text | – | 1460 |
| LMArena Hard Prompts | – | 1482 |
| LMArena Coding | – | 1509 |
| LMArena WebDev | 1339 | 1479 |
| LiveBench | 74.0% | – |
| LiveBench Reasoning | 77.7% | – |
| LiveBench Coding | 83.6% | – |
| LiveBench Agentic Coding | 49.4% | – |
| LiveBench Mathematics | 88.8% | – |
| LiveBench Data Analysis | 78.2% | – |
| LiveBench Language | 73.7% | – |
| AA Intelligence Index | 28.5 | 28.4 |
| IFBench | 77.6% | 76.6% |
| AA-LCR | 82.3% | 80.7% |
| MMMU-Pro | 76.3% | – |
| AA-Omniscience | -2.2 | 9.2 |
| Terminal-Bench Hard | 37.1% | 43.9% |
| GPQA Diamond (AA) | 89.9% | 88.8% |
| Humanity's Last Exam (AA) | 35.7% | 30.8% |
| τ²-Bench Telecom (AA) | 92.1% | 95.9% |
| LiveCodeBench | 88.0% | – |
| CorpFin | – | 66.5% |
| SWE-bench (Vals) | – | 72.8% |
| SWE-Bench Pro | 41.0% | – |
| SWE-bench Verified (bash only) | 72.8% | – |
| SWE-bench Verified (any scaffold) | 72.8% | – |
Data as of 2026-09-10. Best configuration of each model; every score links to its source on the model pages.
GPT-5.2-Codex vs Qwen3 6: questions
- Is GPT-5.2-Codex better than Qwen3 6?
- Qwen3 6 (max) leads on quality: 63.3 vs 60.8. The BenchLeader Index combines every independent quality benchmark; Qwen3 6 (max) is ahead overall as of 2026-09-10, but check the category scores for your use.
- Is GPT-5.2-Codex better than Qwen3 6 for coding?
- Qwen3 6 scores higher in coding (58 vs 56 on the category index, where 50 is average).
- Is GPT-5.2-Codex better than Qwen3 6 for agentic tasks?
- Qwen3 6 scores higher in agentic tasks (72 vs 64 on the category index, where 50 is average).
- Which is cheaper, GPT-5.2-Codex or Qwen3 6?
- Qwen3 6 is cheaper: $2.96 against $4.81 per million tokens, blended at three input tokens per output token.
- Which is faster, GPT-5.2-Codex or Qwen3 6?
- Qwen3 6 streams faster: 59 against 25 output tokens per second.
- Which has the larger context window?
- GPT-5.2-Codex accepts more context: 400k against 246k tokens.