DeepSeek V4.1 Flash vs GPT-5.1
As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-5.1 in 7 of 7 shared categories: General LLM, Reasoning, Science, Coding › Web dev, 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.
GPT-5.1
#18 Best current rank: #18 in Math, as of Oct 14, 2026.
| Category | DeepSeek V4.1 Flash | GPT-5.1 |
|---|---|---|
| General LLM | #29 · #29 in General LLM Margin 19.72789115646259 LMArena leaderboard dataset · Oct 13, 2026 | #47 · #47 in General LLM Margin 31.972789115646265 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #27 · #27 in Reasoning Margin 19.178082191780817 LMArena leaderboard dataset · Oct 13, 2026 | #48 · #48 in Reasoning Margin 33.56164383561644 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #18 · #18 in Math Margin 37.77777777777778 Epoch AI benchmarking hub · Nov 13, 2025 |
| Science | #36 · #36 in Science Margin — Epoch AI benchmarking hub · Sep 9, 2026 | #48 · #48 in Science Margin — Epoch AI benchmarking hub · Nov 13, 2025 |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Nov 13, 2025 |
| Coding › Web dev | #19 · #19 in Coding › Web dev Margin 16.822429906542055 LMArena leaderboard dataset · Oct 13, 2026 | #75 · #75 in Coding › Web dev Margin 69.1588785046729 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #32 · #32 in Long context Margin 21.768707482993193 LMArena leaderboard dataset · Oct 13, 2026 | #54 · #54 in Long context Margin 36.73469387755103 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 | #37 · #37 in Factuality Margin 28.358208955223887 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #8 · #8 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 9, 2026 | #31 · #31 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Nov 13, 2025 |
DeepSeek V4.1 Flash: $0.16319999999999998 per 1M blended tokens.
GPT-5.1: $3.4375000000000004 per 1M blended tokens.
DeepSeek V4.1 Flash: open weights.
GPT-5.1: closed weights.
General LLM: As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-5.1 in General LLM at #29 against #47.
Reasoning: As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-5.1 in Reasoning at #27 against #48.
Science: As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-5.1 in Science at #36 against #48.
Coding › Web dev: As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-5.1 in Coding › Web dev at #19 against #75.
Long context: As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-5.1 in Long context at #32 against #54.
Factuality: As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-5.1 in Factuality at #22 against #37.
Abstraction (ARC): As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-5.1 in Abstraction (ARC) at #8 against #31.
DeepSeek V4.1 Flash or GPT-5.1?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-5.1 in 7 of 7 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, Factuality, and Abstraction (ARC).
DeepSeek V4.1 Flash or GPT-5.1 for General LLM?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-5.1 in General LLM at #29 against #47.
DeepSeek V4.1 Flash or GPT-5.1 for Reasoning?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-5.1 in Reasoning at #27 against #48.
DeepSeek V4.1 Flash or GPT-5.1 for Science?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-5.1 in Science at #36 against #48.