Claude Opus 5 vs DeepSeek V4 Flash High Preview
As of Oct 14, 2026, Claude Opus 5 leads DeepSeek V4 Flash High Preview in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 5
Close. Near-SOTA in Factuality, rank #4.
DeepSeek V4 Flash High Preview
#65 Best current rank: #65 in Coding › Web dev, as of Oct 14, 2026.
| Category | Claude Opus 5 | DeepSeek V4 Flash High Preview |
|---|---|---|
| General LLM | #11 · Was SOTA · General LLM Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #71 · #71 in General LLM Margin 48.29931972789116 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #9 · Was SOTA · Reasoning Margin 6.849315068493155 LMArena leaderboard dataset · Oct 13, 2026 | #74 · #74 in Reasoning Margin 51.36986301369863 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #12 · #12 in Science Margin — Epoch AI benchmarking hub · Jul 24, 2026 | — |
| Coding | #4 · #4 in Coding Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #4 · #4 in Coding › Agentic Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #6 · Was SOTA · Coding › Web dev Margin 4.672897196261687 LMArena leaderboard dataset · Oct 13, 2026 | #65 · #65 in Coding › Web dev Margin 59.81308411214953 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #9 · Was SOTA · Long context Margin 6.122448979591837 LMArena leaderboard dataset · Oct 13, 2026 | #68 · #68 in Long context Margin 46.25850340136054 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #12 · #12 in Vision Margin 36.8421052631579 Epoch AI benchmarking hub · Jul 24, 2026 | — |
| Factuality | #4 · Near-SOTA · Factuality Margin 3.731343283582092 LMArena leaderboard dataset · Oct 13, 2026 | #77 · #77 in Factuality Margin 58.208955223880594 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 24, 2026 | — |
Claude Opus 5: $10 per 1M blended tokens.
DeepSeek V4 Flash High Preview: price per 1M tokens is unset in the catalog.
Claude Opus 5: closed weights.
DeepSeek V4 Flash High Preview: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 5 leads DeepSeek V4 Flash High Preview in General LLM at #11 against #71.
Reasoning: As of Oct 14, 2026, Claude Opus 5 leads DeepSeek V4 Flash High Preview in Reasoning at #9 against #74.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 5 leads DeepSeek V4 Flash High Preview in Coding › Web dev at #6 against #65.
Long context: As of Oct 14, 2026, Claude Opus 5 leads DeepSeek V4 Flash High Preview in Long context at #9 against #68.
Factuality: As of Oct 14, 2026, Claude Opus 5 leads DeepSeek V4 Flash High Preview in Factuality at #4 against #77.
Claude Opus 5 · DeepSeek V4 Flash High Preview
Claude Opus 5 or DeepSeek V4 Flash High Preview?
As of Oct 14, 2026, Claude Opus 5 leads DeepSeek V4 Flash High Preview in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 5 or DeepSeek V4 Flash High Preview for General LLM?
As of Oct 14, 2026, Claude Opus 5 leads DeepSeek V4 Flash High Preview in General LLM at #11 against #71.
Claude Opus 5 or DeepSeek V4 Flash High Preview for Reasoning?
As of Oct 14, 2026, Claude Opus 5 leads DeepSeek V4 Flash High Preview in Reasoning at #9 against #74.
Claude Opus 5 or DeepSeek V4 Flash High Preview for Coding › Web dev?
As of Oct 14, 2026, Claude Opus 5 leads DeepSeek V4 Flash High Preview in Coding › Web dev at #6 against #65.