Claude Opus 5.5 vs DeepSeek V3
As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek V3 in 3 of 3 shared categories: General LLM, Science, and Long context.
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 V3
It used to be. Was SOTA in General LLM.
| Category | Claude Opus 5.5 | DeepSeek V3 |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.3605442176870781 LMArena leaderboard dataset · Oct 13, 2026 | #11 · #11 in General LLM Margin — LMArena leaderboard dataset · Mar 17, 2025 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Feb 11, 2025 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Jan 22, 2025 |
| Science | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #114 · #114 in Science Margin — Epoch AI benchmarking hub · Dec 26, 2024 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Mar 11, 2025 |
| 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 | — |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #144 · #144 in Long context Margin 97.95918367346938 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 | — |
| 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 V3: price per 1M tokens is unset in the catalog.
Claude Opus 5.5: closed weights.
DeepSeek V3: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek V3 in General LLM at #2 against #11.
Science: As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek V3 in Science at #31 against #114.
Long context: As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek V3 in Long context at #1 against #144.
Claude Opus 5.5 or DeepSeek V3?
As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek V3 in 3 of 3 shared categories: General LLM, Science, and Long context.
Claude Opus 5.5 or DeepSeek V3 for General LLM?
As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek V3 in General LLM at #2 against #11.
Claude Opus 5.5 or DeepSeek V3 for Science?
As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek V3 in Science at #31 against #114.
Claude Opus 5.5 or DeepSeek V3 for Long context?
As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek V3 in Long context at #1 against #144.