Claude Opus 4.6 vs DeepSeek V4 Flash
As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4 Flash in 4 of 5 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Opus 4.6
Close. Near-SOTA in Reasoning, rank #2.
DeepSeek V4 Flash
Yes. Yes on General LLM (best per dollar); Reasoning (best per dollar). Not the overall leader.
| Category | Claude Opus 4.6 | DeepSeek V4 Flash |
|---|---|---|
| General LLM | #4 · Near-SOTA · General LLM Margin 2.7210884353741562 LMArena leaderboard dataset · Oct 13, 2026 | #75 · #75 in General LLM Margin 51.02040816326531 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #2 · Near-SOTA · Reasoning Margin 2.0547945205479436 LMArena leaderboard dataset · Oct 13, 2026 | #72 · #72 in Reasoning Margin 50 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 | — |
| 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 | #30 · #30 in Coding › Web dev Margin 27.10280373831776 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #2 · Near-SOTA · Long context Margin 0.6802721088435391 LMArena leaderboard dataset · Oct 13, 2026 | #69 · #69 in Long context Margin 46.93877551020408 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | — |
| Factuality | #3 · Near-SOTA · Factuality Margin 2.9850746268656536 LMArena leaderboard dataset · Oct 13, 2026 | #66 · #66 in Factuality Margin 50 LMArena leaderboard dataset · Oct 13, 2026 |
Claude Opus 4.6: $10 per 1M blended tokens.
DeepSeek V4 Flash: $0.11374999999999999 per 1M blended tokens.
Claude Opus 4.6: closed weights.
DeepSeek V4 Flash: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4 Flash in General LLM at #4 against #75.
Reasoning: As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4 Flash in Reasoning at #2 against #72.
Coding › Web dev: As of Oct 14, 2026, DeepSeek V4 Flash leads Claude Opus 4.6 in Coding › Web dev at #30 against #35.
Long context: As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4 Flash in Long context at #2 against #69.
Factuality: As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4 Flash in Factuality at #3 against #66.
Claude Opus 4.6 · DeepSeek V4 Flash
Claude Opus 4.6 or DeepSeek V4 Flash?
As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4 Flash in 4 of 5 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Opus 4.6 or DeepSeek V4 Flash for General LLM?
As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4 Flash in General LLM at #4 against #75.
Claude Opus 4.6 or DeepSeek V4 Flash for Reasoning?
As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4 Flash in Reasoning at #2 against #72.
Claude Opus 4.6 or DeepSeek V4 Flash for Coding › Web dev?
As of Oct 14, 2026, DeepSeek V4 Flash leads Claude Opus 4.6 in Coding › Web dev at #30 against #35.