DeepSeek V4 Flash vs Qwen3.8-Flash-Next
DeepSeek V4 Flash 
Qwen3.8-Flash-Next Verdict
- DeepSeek V4 Flash (max) and Qwen3.8-Flash-Next are level on quality (62.1 vs 61.6).
- DeepSeek V4 Flash (max) is stronger in agents & tools, composite, instruction following, maths, reasoning.
- Qwen3.8-Flash-Next is stronger in coding, knowledge, multimodal.
- They cost about the same ($0.230 per 1M blended).
- DeepSeek V4 Flash (max) streams 3.8× faster (212 vs 55 tokens per second).
| Metric | DeepSeek V4 Flash (max) | Qwen3.8-Flash-Next |
|---|---|---|
| BenchLeader Index | 62.1 | 61.6 |
| Agents & tools score | 67.0 | 65.8 |
| Coding score | 49.1 | 71.2 |
| Composite score | 72.8 | 67.4 |
| Instruction following score | 76.7 | – |
| Knowledge score | 57.4 | 59.6 |
| Long context score | 66.3 | 66.3 |
| Maths score | 57.3 | – |
| Reasoning score | 73.9 | 63.4 |
| Multimodal score | – | 64.3 |
| Blended price $/M | $0.262 | $0.230 |
| Output speed | 212 tok/s | 55 tok/s |
| Time to first answer | 10.6 s | 39.0 s |
| Context window | 1M | 256k |
| SciCode | 44.9% | – |
| WeirdML | 45.6% | – |
| LMArena WebDev | – | 1635 |
| LMArena Agent | – | -0.1 |
| LiveBench | – | 76.2% |
| LiveBench Reasoning | – | 87.4% |
| LiveBench Coding | – | 72.5% |
| LiveBench Agentic Coding | – | 61.6% |
| LiveBench Mathematics | – | 85.8% |
| LiveBench Data Analysis | – | 74.2% |
| LiveBench Language | – | 74.6% |
| LiveBench Instruction Following | – | 77.1% |
| AA Intelligence Index | 34.5 | 39.9 |
| IFBench | 79.2% | – |
| AA-LCR | 79.7% | 79.7% |
| MMMU-Pro | – | 79.8% |
| AA-Omniscience | -14.3 | -9.7 |
| Terminal-Bench Hard | 35.6% | – |
| GPQA Diamond (AA) | 90.8% | 92.3% |
| Humanity's Last Exam (AA) | 38.5% | 38.0% |
| SciCode (AA) | 50.4% | 50.6% |
| τ²-Bench Telecom (AA) | 95.0% | – |
| AIME 2026 | 95.8% | – |
| HMMT February 2026 | 93.9% | – |
| MathArena Apex | 27.1% | – |
| CritPt | 16.6% | 11.1% |
| GDPval (AA) | 47.1% | 57.4% |
| τ²-Bench Banking (AA) | 39.4% | 45.4% |
| ITBench SRE (AA) | 31.5% | – |
| Analyst Agent (AA) | 25.0% | – |
| LMCA | 35.9% | – |
| DTBench | 86.4% | – |
Data as of 2026-09-19. Best configuration of each model; every score links to its source on the model pages.
DeepSeek V4 Flash vs Qwen3.8-Flash-Next: questions
- Is DeepSeek V4 Flash better than Qwen3.8-Flash-Next?
- DeepSeek V4 Flash (max) and Qwen3.8-Flash-Next are level on quality (62.1 vs 61.6). The BenchLeader Index combines every independent quality benchmark; DeepSeek V4 Flash (max) is ahead overall as of 2026-09-19, but check the category scores for your use.
- Is DeepSeek V4 Flash better than Qwen3.8-Flash-Next for coding?
- Qwen3.8-Flash-Next scores higher in coding (71 vs 49 on the category index, where 50 is average).
- Is DeepSeek V4 Flash better than Qwen3.8-Flash-Next for agentic tasks?
- DeepSeek V4 Flash scores higher in agentic tasks (67 vs 66 on the category index, where 50 is average).
- Which is cheaper, DeepSeek V4 Flash or Qwen3.8-Flash-Next?
- Qwen3.8-Flash-Next is cheaper: $0.230 against $0.262 per million tokens, blended at three input tokens per output token.
- Which is faster, DeepSeek V4 Flash or Qwen3.8-Flash-Next?
- DeepSeek V4 Flash streams faster: 212 against 55 output tokens per second.
- Which has the larger context window?
- DeepSeek V4 Flash accepts more context: 1M against 256k tokens.