Claude Opus 5 vs DeepSeek V3.1
As of Oct 14, 2026, Claude Opus 5 leads DeepSeek V3.1 in 3 of 3 shared categories: General LLM, Reasoning, and Long context.
Claude Opus 5
Close. Near-SOTA in Factuality, rank #4.
DeepSeek V3.1
It used to be. Was SOTA in General LLM.
| Category | Claude Opus 5 | DeepSeek V3.1 |
|---|---|---|
| General LLM | #11 · Was SOTA · General LLM Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #95 · #95 in General LLM Margin 64.62585034013605 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #9 · Was SOTA · Reasoning Margin 6.849315068493155 LMArena leaderboard dataset · Oct 13, 2026 | #103 · #103 in Reasoning Margin 71.23287671232876 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 | — |
| Long context | #9 · Was SOTA · Long context Margin 6.122448979591837 LMArena leaderboard dataset · Oct 13, 2026 | #99 · #99 in Long context Margin 67.34693877551021 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 | — |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 24, 2026 | — |
Claude Opus 5: $10 per 1M blended tokens.
DeepSeek V3.1: price per 1M tokens is unset in the catalog.
Claude Opus 5: closed weights.
DeepSeek V3.1: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 5 leads DeepSeek V3.1 in General LLM at #11 against #95.
Reasoning: As of Oct 14, 2026, Claude Opus 5 leads DeepSeek V3.1 in Reasoning at #9 against #103.
Long context: As of Oct 14, 2026, Claude Opus 5 leads DeepSeek V3.1 in Long context at #9 against #99.
Claude Opus 5 or DeepSeek V3.1?
As of Oct 14, 2026, Claude Opus 5 leads DeepSeek V3.1 in 3 of 3 shared categories: General LLM, Reasoning, and Long context.
Claude Opus 5 or DeepSeek V3.1 for General LLM?
As of Oct 14, 2026, Claude Opus 5 leads DeepSeek V3.1 in General LLM at #11 against #95.
Claude Opus 5 or DeepSeek V3.1 for Reasoning?
As of Oct 14, 2026, Claude Opus 5 leads DeepSeek V3.1 in Reasoning at #9 against #103.
Claude Opus 5 or DeepSeek V3.1 for Long context?
As of Oct 14, 2026, Claude Opus 5 leads DeepSeek V3.1 in Long context at #9 against #99.