DeepSeek V4.1 Flash vs O3
As of Oct 14, 2026, DeepSeek V4.1 Flash leads O3 in 6 of 6 shared categories: General LLM, Reasoning, Science, Long context, Factuality, and Abstraction (ARC).
DeepSeek V4.1 Flash
Yes. Yes on General LLM (best per dollar); Reasoning (best per dollar). Not the overall leader.
O3
It used to be. Was SOTA in General LLM.
| Category | DeepSeek V4.1 Flash | O3 |
|---|---|---|
| General LLM | #29 · #29 in General LLM Margin 19.72789115646259 LMArena leaderboard dataset · Oct 13, 2026 | #78 · Was SOTA · General LLM Margin 53.06122448979592 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #27 · #27 in Reasoning Margin 19.178082191780817 LMArena leaderboard dataset · Oct 13, 2026 | #90 · Was SOTA · Reasoning Margin 62.32876712328767 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #20 · Was SOTA · Math Margin 42.22222222222222 Epoch AI benchmarking hub · Apr 16, 2025 |
| Science | #36 · #36 in Science Margin — Epoch AI benchmarking hub · Sep 9, 2026 | #67 · #67 in Science Margin — Epoch AI benchmarking hub · Apr 16, 2025 |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Apr 16, 2025 |
| Coding › Web dev | #19 · #19 in Coding › Web dev Margin 16.822429906542055 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #32 · #32 in Long context Margin 21.768707482993193 LMArena leaderboard dataset · Oct 13, 2026 | #110 · Was SOTA · Long context Margin 74.82993197278913 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #21 · #21 in Vision Margin 57.89473684210526 Epoch AI benchmarking hub · Sep 9, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #22 · #22 in Factuality Margin 17.164179104477626 LMArena leaderboard dataset · Oct 13, 2026 | #105 · #105 in Factuality Margin 79.1044776119403 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #8 · #8 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 9, 2026 | #37 · #37 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Apr 16, 2025 |
DeepSeek V4.1 Flash: $0.16319999999999998 per 1M blended tokens.
O3: $3.5 per 1M blended tokens.
DeepSeek V4.1 Flash: open weights.
O3: closed weights.
General LLM: As of Oct 14, 2026, DeepSeek V4.1 Flash leads O3 in General LLM at #29 against #78.
Reasoning: As of Oct 14, 2026, DeepSeek V4.1 Flash leads O3 in Reasoning at #27 against #90.
Science: As of Oct 14, 2026, DeepSeek V4.1 Flash leads O3 in Science at #36 against #67.
Long context: As of Oct 14, 2026, DeepSeek V4.1 Flash leads O3 in Long context at #32 against #110.
Factuality: As of Oct 14, 2026, DeepSeek V4.1 Flash leads O3 in Factuality at #22 against #105.
Abstraction (ARC): As of Oct 14, 2026, DeepSeek V4.1 Flash leads O3 in Abstraction (ARC) at #8 against #37.
DeepSeek V4.1 Flash or O3?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads O3 in 6 of 6 shared categories: General LLM, Reasoning, Science, Long context, Factuality, and Abstraction (ARC).
DeepSeek V4.1 Flash or O3 for General LLM?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads O3 in General LLM at #29 against #78.
DeepSeek V4.1 Flash or O3 for Reasoning?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads O3 in Reasoning at #27 against #90.
DeepSeek V4.1 Flash or O3 for Science?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads O3 in Science at #36 against #67.