Claude Opus 4.6 vs DeepSeek V4 Flash High Preview
As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4 Flash High Preview in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 4.6
Close. Near-SOTA in Reasoning, rank #2.
DeepSeek V4 Flash High Preview
#65 Best current rank: #65 in Coding › Web dev, as of Oct 14, 2026.
| Category | Claude Opus 4.6 | DeepSeek V4 Flash High Preview |
|---|---|---|
| General LLM | #4 · Near-SOTA · General LLM Margin 2.7210884353741562 LMArena leaderboard dataset · Oct 13, 2026 | #71 · #71 in General LLM Margin 48.29931972789116 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #2 · Near-SOTA · Reasoning Margin 2.0547945205479436 LMArena leaderboard dataset · Oct 13, 2026 | #74 · #74 in Reasoning Margin 51.36986301369863 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 | #65 · #65 in Coding › Web dev Margin 59.81308411214953 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #2 · Near-SOTA · Long context Margin 0.6802721088435391 LMArena leaderboard dataset · Oct 13, 2026 | #68 · #68 in Long context Margin 46.25850340136054 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 | #77 · #77 in Factuality Margin 58.208955223880594 LMArena leaderboard dataset · Oct 13, 2026 |
Claude Opus 4.6: $10 per 1M blended tokens.
DeepSeek V4 Flash High Preview: price per 1M tokens is unset in the catalog.
Claude Opus 4.6: closed weights.
DeepSeek V4 Flash High Preview: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4 Flash High Preview in General LLM at #4 against #71.
Reasoning: As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4 Flash High Preview in Reasoning at #2 against #74.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4 Flash High Preview in Coding › Web dev at #35 against #65.
Long context: As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4 Flash High Preview in Long context at #2 against #68.
Factuality: As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4 Flash High Preview in Factuality at #3 against #77.
Claude Opus 4.6 · DeepSeek V4 Flash High Preview
Claude Opus 4.6 or DeepSeek V4 Flash High Preview?
As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4 Flash High Preview in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 4.6 or DeepSeek V4 Flash High Preview for General LLM?
As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4 Flash High Preview in General LLM at #4 against #71.
Claude Opus 4.6 or DeepSeek V4 Flash High Preview for Reasoning?
As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4 Flash High Preview in Reasoning at #2 against #74.
Claude Opus 4.6 or DeepSeek V4 Flash High Preview for Coding › Web dev?
As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V4 Flash High Preview in Coding › Web dev at #35 against #65.