DeepSeek V4.1 Flash vs O3 Mini
As of Oct 14, 2026, DeepSeek V4.1 Flash leads O3 Mini in 4 of 5 shared categories: Reasoning, Science, Long context, and Abstraction (ARC).
DeepSeek V4.1 Flash
Yes. Yes on General LLM (best per dollar); Factuality (best per dollar). Not the overall leader.
O3 Mini
It used to be. Was SOTA in Reasoning.
| Category | DeepSeek V4.1 Flash | O3 Mini |
|---|---|---|
| General LLM | #29 · #29 in General LLM Margin 19.72789115646259 LMArena leaderboard dataset · Oct 13, 2026 | #7 · #7 in General LLM Margin — LMArena leaderboard dataset · Apr 16, 2025 |
| Reasoning | #27 · #27 in Reasoning Margin 19.178082191780817 LMArena leaderboard dataset · Oct 13, 2026 | #133 · Was SOTA · Reasoning Margin 91.78082191780823 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #36 · #36 in Science Margin — Epoch AI benchmarking hub · Sep 9, 2026 | #76 · #76 in Science Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| 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 | #145 · #145 in Long context Margin 98.63945578231292 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #21 · #21 in Vision Margin 57.89473684210526 Epoch AI benchmarking hub · Sep 9, 2026 | — |
| Factuality | #22 · #22 in Factuality Margin 17.164179104477626 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Abstraction (ARC) | #8 · #8 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 9, 2026 | #51 · #51 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
DeepSeek V4.1 Flash: $0.23787 per 1M blended tokens.
O3 Mini: $1.9250000000000003 per 1M blended tokens.
DeepSeek V4.1 Flash: open weights.
O3 Mini: closed weights.
General LLM: As of Oct 14, 2026, O3 Mini leads DeepSeek V4.1 Flash in General LLM at #7 against #29.
Reasoning: As of Oct 14, 2026, DeepSeek V4.1 Flash leads O3 Mini in Reasoning at #27 against #133.
Science: As of Oct 14, 2026, DeepSeek V4.1 Flash leads O3 Mini in Science at #36 against #76.
Long context: As of Oct 14, 2026, DeepSeek V4.1 Flash leads O3 Mini in Long context at #32 against #145.
Abstraction (ARC): As of Oct 14, 2026, DeepSeek V4.1 Flash leads O3 Mini in Abstraction (ARC) at #8 against #51.
DeepSeek V4.1 Flash or O3 Mini?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads O3 Mini in 4 of 5 shared categories: Reasoning, Science, Long context, and Abstraction (ARC).
DeepSeek V4.1 Flash or O3 Mini for General LLM?
As of Oct 14, 2026, O3 Mini leads DeepSeek V4.1 Flash in General LLM at #7 against #29.
DeepSeek V4.1 Flash or O3 Mini for Reasoning?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads O3 Mini in Reasoning at #27 against #133.
DeepSeek V4.1 Flash or O3 Mini for Science?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads O3 Mini in Science at #36 against #76.