Comparing 2 models
DeepSeek V4.1 Flash vs GPT-6 Astra
Benchmarks through
Verdict
GPT-6 Astra places higher on 3 of the 4 tasks where both are ranked. DeepSeek V4.1 Flash costs 71.4x less per input token. GPT-6 Astra accepts 1.0x more context. Only DeepSeek V4.1 Flash has open weights for self-hosting.
- Choose DeepSeek V4.1 Flash for Agentic Coding (#4), you need to self-host.
- Choose GPT-6 Astra for Autonomous Agents (#4), Debugging & Code Review (#4), AI Agents (#4).
Built from the published task rankings below; ranks come from each task's own weighted benchmarks, so a win on one task says nothing about another.
Measured head to head
Benchmarks both models were run on
| Evaluation | DeepSeek V4.1 Flash | GPT-6 Astra | Source |
|---|---|---|---|
| FrontierMath Tiers 1-3 (Epoch AI) | 67.4% ± 2.8 | 93.7% ± 1.4 | source · 2026-10-08 |
| GPQA Diamond (Epoch AI) | 89.8% ± 1.7 | 95.8% ± 1.4 | source · 2026-10-09 |
| LiveBench Agentic Coding | 77.3% | 57.3% | source · 2026-10-18 |
| LiveBench Coding | 80.0% | 80.4% | source · 2026-10-18 |
| LiveBench Data Analysis | 79.3% | 83.0% | source · 2026-10-18 |
| LiveBench Instruction Following | 70.0% | 75.6% | source · 2026-10-18 |
| LiveBench Language | 81.2% | 89.4% | source · 2026-10-18 |
| LiveBench Math | 93.3% | 96.8% | source · 2026-10-18 |
| LiveBench Reasoning | 86.7% | 92.7% | source · 2026-10-18 |
| LMArena Agent | 2.3 | 14 | source · 2026-10-23 |
| LMArena Agent Bash Recovery | 7.9 | 5.5 | source · 2026-10-08 |
| LMArena Agent Steerability | 1 | 14.5 | source · 2026-10-23 |
| LMArena Agent Task Outcome | 5.8 | 13.2 | source · 2026-10-23 |
| LMArena Agent Tool Hallucination | 0.6 | 0.7 | source · 2026-10-23 |
| LMArena Creative Writing | 1438 Elo | 1421 Elo | source · 2026-10-22 |
| LMArena Instruction Following | 1474 Elo | 1455 Elo | source · 2026-10-22 |
| LMArena Long Query | 1474 Elo | 1462 Elo | source · 2026-10-22 |
| LMArena Math | 1479 Elo | 1466 Elo | source · 2026-10-22 |
| LMArena Text | 1476 Elo | 1476 Elo | source · 2026-10-22 |
| LMArena Text Factuality | 1469 Elo | 1466 Elo | source · 2026-10-22 |
| LMArena Vision | 1261 Elo | 1285 Elo | source · 2026-10-19 |
| LMArena Vision Diagrams | 1293 Elo | 1310 Elo | source · 2026-10-19 |
| LMArena Vision OCR | 1272 Elo | 1299 Elo | source · 2026-10-19 |
| LMArena WebDev | 1619 Elo | 1774 Elo | source · 2026-10-27 |
| LMArena WebDev Image-to-Web | 1606 Elo | 1726 Elo | source · 2026-10-19 |
| OTIS Mock AIME (Epoch AI) | 98.3% ± 0.6 | 100% ± 0 | source · 2026-10-08 |
| SimpleQA Verified (Epoch AI) | 42.9% ± 1.6 | 75.6% ± 1.4 | source · 2026-10-13 |
Values are as published by each evaluator, in its own units; rows from different evaluators are not on a common scale.
task evidence
How they place when the question changes
Lower ranks are better. “Best” marks the strongest option in this shortlist for that task.