Claude Opus 4.6 vs DeepSeek V4.1 Flash
As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4.1 Flash in 5 of 6 shared categories: General LLM, Reasoning, Science, Long context, and Factuality.
Claude Opus 4.6
Close. Near-SOTA in Reasoning, rank #2.
DeepSeek V4.1 Flash
Yes. Yes on General LLM (best per dollar); Reasoning (best per dollar). Not the overall leader.
| Category | Claude Opus 4.6 | DeepSeek V4.1 Flash |
|---|---|---|
| General LLM | #4 · Near-SOTA · General LLM Margin 2.7210884353741562 LMArena leaderboard dataset · Oct 13, 2026 | #29 · #29 in General LLM Margin 19.72789115646259 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #2 · Near-SOTA · Reasoning Margin 2.0547945205479436 LMArena leaderboard dataset · Oct 13, 2026 | #27 · #27 in Reasoning Margin 19.178082191780817 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #11 · #11 in Math Margin 22.22222222222223 Epoch AI benchmarking hub · Feb 5, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #32 · #32 in Science Margin — Epoch AI benchmarking hub · Feb 5, 2026 | #36 · #36 in Science Margin — Epoch AI benchmarking hub · Sep 9, 2026 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Feb 5, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Web dev | #35 · Was SOTA · Coding › Web dev Margin 31.775700934579433 LMArena leaderboard dataset · Oct 13, 2026 | #19 · #19 in Coding › Web dev Margin 16.822429906542055 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #2 · Near-SOTA · Long context Margin 0.6802721088435391 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 | #3 · Near-SOTA · Factuality Margin 2.9850746268656536 LMArena leaderboard dataset · Oct 13, 2026 | #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 |
Claude Opus 4.6: $10 per 1M blended tokens.
DeepSeek V4.1 Flash: $0.23463 per 1M blended tokens.
Claude Opus 4.6: closed weights.
DeepSeek V4.1 Flash: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4.1 Flash in General LLM at #4 against #29.
Reasoning: As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4.1 Flash in Reasoning at #2 against #27.
Science: As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4.1 Flash in Science at #32 against #36.
Coding › Web dev: As of Oct 14, 2026, DeepSeek V4.1 Flash leads Claude Opus 4.6 in Coding › Web dev at #19 against #35.
Long context: As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4.1 Flash in Long context at #2 against #32.
Factuality: As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4.1 Flash in Factuality at #3 against #22.
Claude Opus 4.6 · DeepSeek V4.1 Flash
Claude Opus 4.6 or DeepSeek V4.1 Flash?
As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4.1 Flash in 5 of 6 shared categories: General LLM, Reasoning, Science, Long context, and Factuality.
Claude Opus 4.6 or DeepSeek V4.1 Flash for General LLM?
As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4.1 Flash in General LLM at #4 against #29.
Claude Opus 4.6 or DeepSeek V4.1 Flash for Reasoning?
As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4.1 Flash in Reasoning at #2 against #27.
Claude Opus 4.6 or DeepSeek V4.1 Flash for Science?
As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4.1 Flash in Science at #32 against #36.