DeepSeek V4.1 Flash vs GPT-4.5 Preview
As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-4.5 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); Reasoning (best per dollar). Not the overall leader.
GPT-4.5 Preview
It used to be. Was SOTA in General LLM.
| Category | DeepSeek V4.1 Flash | GPT-4.5 Preview |
|---|---|---|
| General LLM | #29 · #29 in General LLM Margin 19.72789115646259 LMArena leaderboard dataset · Oct 13, 2026 | #62 · Was SOTA · General LLM Margin 42.17687074829932 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #27 · #27 in Reasoning Margin 19.178082191780817 LMArena leaderboard dataset · Oct 13, 2026 | #93 · Was SOTA · Reasoning Margin 64.38356164383562 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #38 · #38 in Math Margin 84.44444444444444 Epoch AI benchmarking hub · Feb 27, 2025 |
| Science | #36 · #36 in Science Margin — Epoch AI benchmarking hub · Sep 9, 2026 | #92 · #92 in Science Margin — Epoch AI benchmarking hub · Feb 27, 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 | #76 · Was SOTA · Long context Margin 51.70068027210884 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 | — |
| Abstraction (ARC) | #8 · #8 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 9, 2026 | #83 · #83 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Feb 27, 2025 |
DeepSeek V4.1 Flash: $0.26249999999999996 per 1M blended tokens.
GPT-4.5 Preview: price per 1M tokens is unset in the catalog.
DeepSeek V4.1 Flash: open weights.
GPT-4.5 Preview: closed weights.
General LLM: As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-4.5 Preview in General LLM at #29 against #62.
Reasoning: As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-4.5 Preview in Reasoning at #27 against #93.
Science: As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-4.5 Preview in Science at #36 against #92.
Long context: As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-4.5 Preview in Long context at #32 against #76.
Abstraction (ARC): As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-4.5 Preview in Abstraction (ARC) at #8 against #83.
DeepSeek V4.1 Flash · GPT-4.5 Preview
DeepSeek V4.1 Flash or GPT-4.5 Preview?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-4.5 Preview in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Abstraction (ARC).
DeepSeek V4.1 Flash or GPT-4.5 Preview for General LLM?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-4.5 Preview in General LLM at #29 against #62.
DeepSeek V4.1 Flash or GPT-4.5 Preview for Reasoning?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-4.5 Preview in Reasoning at #27 against #93.
DeepSeek V4.1 Flash or GPT-4.5 Preview for Science?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads GPT-4.5 Preview in Science at #36 against #92.