DeepSeek V4.1 Flash vs O1 Preview
As of Oct 14, 2026, DeepSeek V4.1 Flash leads O1 Preview in 5 of 5 shared categories: General LLM, 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.
O1 Preview
It used to be. Was SOTA in General LLM.
| Category | DeepSeek V4.1 Flash | O1 Preview |
|---|---|---|
| General LLM | #29 · #29 in General LLM Margin 19.72789115646259 LMArena leaderboard dataset · Oct 13, 2026 | #129 · Was SOTA · General LLM Margin 87.75510204081633 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #27 · #27 in Reasoning Margin 19.178082191780817 LMArena leaderboard dataset · Oct 13, 2026 | #137 · Was SOTA · Reasoning Margin 94.52054794520548 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 | #125 · #125 in Science Margin — Epoch AI benchmarking hub · Sep 12, 2024 |
| 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 | #135 · Was SOTA · Long context Margin 91.83673469387755 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 | — |
| Abstraction (ARC) | #8 · #8 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 9, 2026 | #73 · #73 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 12, 2024 |
DeepSeek V4.1 Flash: $0.23787 per 1M blended tokens.
O1 Preview: price per 1M tokens is unset in the catalog.
DeepSeek V4.1 Flash: open weights.
O1 Preview: closed weights.
General LLM: As of Oct 14, 2026, DeepSeek V4.1 Flash leads O1 Preview in General LLM at #29 against #129.
Reasoning: As of Oct 14, 2026, DeepSeek V4.1 Flash leads O1 Preview in Reasoning at #27 against #137.
Science: As of Oct 14, 2026, DeepSeek V4.1 Flash leads O1 Preview in Science at #36 against #125.
Long context: As of Oct 14, 2026, DeepSeek V4.1 Flash leads O1 Preview in Long context at #32 against #135.
Abstraction (ARC): As of Oct 14, 2026, DeepSeek V4.1 Flash leads O1 Preview in Abstraction (ARC) at #8 against #73.
DeepSeek V4.1 Flash · O1 Preview
DeepSeek V4.1 Flash or O1 Preview?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads O1 Preview in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Abstraction (ARC).
DeepSeek V4.1 Flash or O1 Preview for General LLM?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads O1 Preview in General LLM at #29 against #129.
DeepSeek V4.1 Flash or O1 Preview for Reasoning?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads O1 Preview in Reasoning at #27 against #137.
DeepSeek V4.1 Flash or O1 Preview for Science?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads O1 Preview in Science at #36 against #125.