GPT-5.3 Codex vs Qwen3.8 2.4T A95B
GPT-5.3 Codex 
Qwen3.8 2.4T A95B Verdict
- GPT-5.3 Codex (xhigh) and Qwen3.8 2.4T A95B are level on quality (65.4 vs 65.2).
- GPT-5.3 Codex (xhigh) is stronger in agents & tools, coding, instruction following, knowledge, long context, multimodal.
- Qwen3.8 2.4T A95B is stronger in composite, reasoning.
- Qwen3.8 2.4T A95B is 1.6× cheaper ($3.00 vs $4.81 per 1M blended).
- GPT-5.3 Codex (xhigh) streams 3.3× faster (125 vs 38 tokens per second).
| Metric | GPT-5.3 Codex (xhigh) | Qwen3.8 2.4T A95B |
|---|---|---|
| BenchLeader Index | 65.4 | 65.2 |
| Agents & tools score | 79.8 | 78.3 |
| Coding score | 61.7 | – |
| Composite score | 70.2 | 79.8 |
| Instruction following score | 73.4 | – |
| Knowledge score | 69.4 | 66.3 |
| Long context score | 68.2 | 66.6 |
| Multimodal score | 63.0 | – |
| Reasoning score | 74.4 | 80.5 |
| Blended price $/M | $4.81 | $3.00 |
| Output speed | 125 tok/s | 38 tok/s |
| Time to first answer | 50.8 s | 55.2 s |
| Context window | 400k | 984k |
| WeirdML | 77.9% | – |
| AA Intelligence Index | 32.5 | 40.0 |
| IFBench | 75.4% | – |
| AA-LCR | 83.3% | 80.3% |
| MMMU-Pro | 78.5% | – |
| AA-Omniscience | 10.9 | 4.3 |
| Terminal-Bench Hard | 53.0% | – |
| GPQA Diamond (AA) | 91.5% | 93.5% |
| Humanity's Last Exam (AA) | 42.5% | 42.5% |
| SciCode (AA) | – | 54.0% |
| τ²-Bench Telecom (AA) | 86.0% | – |
| LiveCodeBench | 87.3% | – |
| IOI | 53.8% | – |
| SWE-bench (Vals) | 78.0% | – |
| CritPt | 16.9% | 20.0% |
| GDPval (AA) | – | 56.4% |
| τ²-Bench Banking (AA) | – | 49.1% |
| Vibe Code Bench v1.1 | 61.8% | – |
| ALE-Bench | 1655.2 | – |
Data as of 2026-09-19. Best configuration of each model; every score links to its source on the model pages.
GPT-5.3 Codex vs Qwen3.8 2.4T A95B: questions
- Is GPT-5.3 Codex better than Qwen3.8 2.4T A95B?
- GPT-5.3 Codex (xhigh) and Qwen3.8 2.4T A95B are level on quality (65.4 vs 65.2). The BenchLeader Index combines every independent quality benchmark; GPT-5.3 Codex (xhigh) is ahead overall as of 2026-09-19, but check the category scores for your use.
- Is GPT-5.3 Codex better than Qwen3.8 2.4T A95B for agentic tasks?
- GPT-5.3 Codex scores higher in agentic tasks (80 vs 78 on the category index, where 50 is average).
- Which is cheaper, GPT-5.3 Codex or Qwen3.8 2.4T A95B?
- Qwen3.8 2.4T A95B is cheaper: $3.00 against $4.81 per million tokens, blended at three input tokens per output token.
- Which is faster, GPT-5.3 Codex or Qwen3.8 2.4T A95B?
- GPT-5.3 Codex streams faster: 125 against 38 output tokens per second.
- Which has the larger context window?
- Qwen3.8 2.4T A95B accepts more context: 984k against 400k tokens.