Claude Opus 5.5 vs DeepSeek V4 Pro
As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek V4 Pro in 5 of 6 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 5.5
Yes. SOTA in co-SOTA in Reasoning, co-SOTA in Coding, co-SOTA in Coding › Agentic, Coding › Web dev, co-SOTA in Long context and co-SOTA in Factuality.
DeepSeek V4 Pro
#28 Best recorded rank: #28 in Science, as of Oct 14, 2026.
| Category | Claude Opus 5.5 | DeepSeek V4 Pro |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.3605442176870781 LMArena leaderboard dataset · Oct 13, 2026 | #44 · #44 in General LLM Margin 29.931972789115648 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #45 · #45 in Reasoning Margin 31.506849315068493 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 | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #28 · #28 in Science Margin — Epoch AI benchmarking hub · Apr 24, 2026 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Apr 24, 2026 |
| Coding › Agentic | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #1 · SOTA · Coding › Web dev Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #57 · #57 in Coding › Web dev Margin 52.33644859813084 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #43 · #43 in Long context Margin 29.25170068027211 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 2026 | — |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #41 · #41 in Factuality Margin 31.343283582089555 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 | — |
Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.
DeepSeek V4 Pro: $0.4604475 per 1M blended tokens.
Claude Opus 5.5: closed weights.
DeepSeek V4 Pro: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek V4 Pro in General LLM at #2 against #44.
Reasoning: As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek V4 Pro in Reasoning at #1 against #45.
Science: As of Oct 14, 2026, DeepSeek V4 Pro leads Claude Opus 5.5 in Science at #28 against #31.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek V4 Pro in Coding › Web dev at #1 against #57.
Long context: As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek V4 Pro in Long context at #1 against #43.
Factuality: As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek V4 Pro in Factuality at #1 against #41.
Claude Opus 5.5 · DeepSeek V4 Pro
Claude Opus 5.5 or DeepSeek V4 Pro?
As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek V4 Pro in 5 of 6 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 5.5 or DeepSeek V4 Pro for General LLM?
As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek V4 Pro in General LLM at #2 against #44.
Claude Opus 5.5 or DeepSeek V4 Pro for Reasoning?
As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek V4 Pro in Reasoning at #1 against #45.
Claude Opus 5.5 or DeepSeek V4 Pro for Science?
As of Oct 14, 2026, DeepSeek V4 Pro leads Claude Opus 5.5 in Science at #28 against #31.