DeepSeek V4.1 Flash vs GPT-6 Astra
DeepSeek V4.1 Flash 
GPT-6 Astra Verdict
- GPT-6 Astra (high) leads on quality: 71.9 vs 61.9.
- DeepSeek V4.1 Flash (max) is stronger in long context.
- GPT-6 Astra (high) is stronger in agents & tools, coding, composite, knowledge, multimodal, reasoning, maths.
- DeepSeek V4.1 Flash (max) is 76× cheaper ($0.262 vs $20.00 per 1M blended).
- DeepSeek V4.1 Flash (max) streams 4.6× faster (215 vs 47 tokens per second).
| Metric | DeepSeek V4.1 Flash (max) | GPT-6 Astra (high) |
|---|---|---|
| BenchLeader Index | 61.9 | 71.9 |
| Agents & tools score | 59.6 | 64.9 |
| Coding score | 68.9 | 72.8 |
| Composite score | 74.5 | 93.8 |
| Knowledge score | 61.7 | 85.1 |
| Long context score | 68.5 | 66.5 |
| Multimodal score | 61.4 | 71.2 |
| Reasoning score | 69.5 | 81.9 |
| Maths score | – | 79.5 |
| Blended price $/M | $0.262 | $20.00 |
| Output speed | 215 tok/s | 47 tok/s |
| Time to first answer | 10.5 s | 49.2 s |
| Context window | 1M | 1.1M |
| FrontierMath Tier 4 | – | 97.6% |
| Terminal-Bench | – | 57.9% |
| SciCode | – | 55.4% |
| WeirdML | – | 92.9% |
| 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 | 51.0 |
| AA-LCR | 84.0% | 80.0% |
| MMMU-Pro | 77.0% | 86.4% |
| AA-Omniscience | -5.3 | 43.7 |
| GPQA Diamond (AA) | – | 95.0% |
| Humanity's Last Exam (AA) | 39.3% | 53.1% |
| SciCode (AA) | 51.9% | 55.4% |
| ARC-AGI-1 | – | 98.5% |
| ARC-AGI-2 | – | 92.1% |
| ARC-AGI-3 | – | 99.9% |
| CritPt | 14.3% | 28.9% |
| GDPval (AA) | 56.6% | 51.5% |
| τ²-Bench Banking (AA) | – | 40.0% |
| MirrorCode | – | 46.7% |
| DeepSWE | – | 73.2% |
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 GPT-6 Astra: questions
- Is DeepSeek V4.1 Flash better than GPT-6 Astra?
- GPT-6 Astra (high) leads on quality: 71.9 vs 61.9. The BenchLeader Index combines every independent quality benchmark; GPT-6 Astra (high) is ahead overall as of 2026-09-19, but check the category scores for your use.
- Is DeepSeek V4.1 Flash better than GPT-6 Astra for coding?
- GPT-6 Astra scores higher in coding (73 vs 69 on the category index, where 50 is average).
- Is DeepSeek V4.1 Flash better than GPT-6 Astra for agentic tasks?
- GPT-6 Astra scores higher in agentic tasks (65 vs 60 on the category index, where 50 is average).
- Which is cheaper, DeepSeek V4.1 Flash or GPT-6 Astra?
- DeepSeek V4.1 Flash is cheaper: $0.262 against $20.00 per million tokens, blended at three input tokens per output token.
- Which is faster, DeepSeek V4.1 Flash or GPT-6 Astra?
- DeepSeek V4.1 Flash streams faster: 215 against 47 output tokens per second.
- Which has the larger context window?
- GPT-6 Astra accepts more context: 1.1M against 1M tokens.