DeepSeek V4.1 Flash vs DeepSeek V4 Flash
DeepSeek V4.1 Flash Verdict
- DeepSeek V4.1 Flash (max) and DeepSeek V4 Flash (max) are level on quality (61.9 vs 62.1).
- DeepSeek V4.1 Flash (max) is stronger in coding, composite, knowledge, long context, multimodal.
- DeepSeek V4 Flash (max) is stronger in agents & tools, reasoning, instruction following, maths.
- They cost about the same ($0.262 per 1M blended).
| Metric | DeepSeek V4.1 Flash (max) | DeepSeek V4 Flash (max) |
|---|---|---|
| BenchLeader Index | 61.9 | 62.1 |
| Agents & tools score | 59.6 | 67.0 |
| Coding score | 68.9 | 49.1 |
| Composite score | 74.5 | 72.8 |
| Knowledge score | 61.7 | 57.4 |
| Long context score | 68.5 | 66.3 |
| Multimodal score | 61.4 | – |
| Reasoning score | 69.5 | 73.9 |
| Instruction following score | – | 76.7 |
| Maths score | – | 57.3 |
| Blended price $/M | $0.262 | $0.262 |
| Output speed | 215 tok/s | 212 tok/s |
| Time to first answer | 10.5 s | 10.6 s |
| Context window | 1M | 1M |
| SciCode | – | 44.9% |
| WeirdML | – | 45.6% |
| LMArena WebDev | 1614 | – |
| LMArena Agent | 4.9 | – |
| LiveBench | 81.1% | – |
| LiveBench Reasoning | 86.7% | – |
| LiveBench Coding | 80.0% | – |
| LiveBench Agentic Coding | 77.3% | – |
| LiveBench Mathematics | 93.3% | – |
| LiveBench Data Analysis | 79.3% | – |
| LiveBench Language | 81.2% | – |
| LiveBench Instruction Following | 70.0% | – |
| AA Intelligence Index | 39.5 | 34.5 |
| IFBench | – | 79.2% |
| AA-LCR | 84.0% | 79.7% |
| MMMU-Pro | 77.0% | – |
| AA-Omniscience | -5.3 | -14.3 |
| Terminal-Bench Hard | – | 35.6% |
| GPQA Diamond (AA) | – | 90.8% |
| Humanity's Last Exam (AA) | 39.3% | 38.5% |
| SciCode (AA) | 51.9% | 50.4% |
| τ²-Bench Telecom (AA) | – | 95.0% |
| AIME 2026 | – | 95.8% |
| HMMT February 2026 | – | 93.9% |
| MathArena Apex | – | 27.1% |
| CritPt | 14.3% | 16.6% |
| GDPval (AA) | 56.6% | 47.1% |
| τ²-Bench Banking (AA) | – | 39.4% |
| 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 V4.1 Flash vs DeepSeek V4 Flash: questions
- Is DeepSeek V4.1 Flash better than DeepSeek V4 Flash?
- DeepSeek V4.1 Flash (max) and DeepSeek V4 Flash (max) are level on quality (61.9 vs 62.1). 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 V4.1 Flash better than DeepSeek V4 Flash for coding?
- DeepSeek V4.1 Flash scores higher in coding (69 vs 49 on the category index, where 50 is average).
- Is DeepSeek V4.1 Flash better than DeepSeek V4 Flash for agentic tasks?
- DeepSeek V4 Flash scores higher in agentic tasks (67 vs 60 on the category index, where 50 is average).
- Which is cheaper, DeepSeek V4.1 Flash or DeepSeek V4 Flash?
- DeepSeek V4.1 Flash is cheaper: $0.262 against $0.262 per million tokens, blended at three input tokens per output token.
- Which is faster, DeepSeek V4.1 Flash or DeepSeek V4 Flash?
- DeepSeek V4.1 Flash streams faster: 215 against 212 output tokens per second.
- Which has the larger context window?
- Both accept 1M tokens of context.