Claude Opus 4 vs DeepSeek V4.1 Flash
As of Oct 14, 2026, Claude Opus 4 leads DeepSeek V4.1 Flash in 0 of 5 shared categories.
Claude Opus 4
It used to be. Was SOTA in Reasoning.
DeepSeek V4.1 Flash
Yes. Yes on General LLM (best per dollar); Reasoning (best per dollar). Not the overall leader.
| Category | Claude Opus 4 | DeepSeek V4.1 Flash |
|---|---|---|
| General LLM | #102 · #102 in General LLM Margin 69.38775510204081 LMArena leaderboard dataset · Oct 13, 2026 | #29 · #29 in General LLM Margin 19.72789115646259 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #97 · Was SOTA · Reasoning Margin 67.12328767123287 LMArena leaderboard dataset · Oct 13, 2026 | #27 · #27 in Reasoning Margin 19.178082191780817 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #29 · #29 in Math Margin 62.22222222222222 Epoch AI benchmarking hub · May 22, 2025 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #91 · #91 in Science Margin — Epoch AI benchmarking hub · May 22, 2025 | #36 · #36 in Science Margin — Epoch AI benchmarking hub · Sep 9, 2026 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · May 22, 2025 | #— · 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 | #70 · #70 in Long context Margin 47.61904761904762 LMArena leaderboard dataset · Oct 13, 2026 | #32 · #32 in Long context Margin 21.768707482993193 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | #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) | #69 · #69 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · May 22, 2025 | #8 · #8 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 9, 2026 |
Claude Opus 4: price per 1M tokens is unset in the catalog.
DeepSeek V4.1 Flash: $0.16319999999999998 per 1M blended tokens.
Claude Opus 4: closed weights.
DeepSeek V4.1 Flash: open weights.
General LLM: As of Oct 14, 2026, DeepSeek V4.1 Flash leads Claude Opus 4 in General LLM at #29 against #102.
Reasoning: As of Oct 14, 2026, DeepSeek V4.1 Flash leads Claude Opus 4 in Reasoning at #27 against #97.
Science: As of Oct 14, 2026, DeepSeek V4.1 Flash leads Claude Opus 4 in Science at #36 against #91.
Long context: As of Oct 14, 2026, DeepSeek V4.1 Flash leads Claude Opus 4 in Long context at #32 against #70.
Abstraction (ARC): As of Oct 14, 2026, DeepSeek V4.1 Flash leads Claude Opus 4 in Abstraction (ARC) at #8 against #69.
Claude Opus 4 · DeepSeek V4.1 Flash
Claude Opus 4 or DeepSeek V4.1 Flash?
As of Oct 14, 2026, Claude Opus 4 leads DeepSeek V4.1 Flash in 0 of 5 shared categories.
Claude Opus 4 or DeepSeek V4.1 Flash for General LLM?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads Claude Opus 4 in General LLM at #29 against #102.
Claude Opus 4 or DeepSeek V4.1 Flash for Reasoning?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads Claude Opus 4 in Reasoning at #27 against #97.
Claude Opus 4 or DeepSeek V4.1 Flash for Science?
As of Oct 14, 2026, DeepSeek V4.1 Flash leads Claude Opus 4 in Science at #36 against #91.