Claude Opus 4.6 vs DeepSeek V3.1 Terminus Thinking
As of Oct 15, 2026, Claude Opus 4.6 leads DeepSeek V3.1 Terminus Thinking in 3 of 3 shared categories: General LLM, Reasoning, and Long context.
Claude Opus 4.6
Close. Near-SOTA in Reasoning, rank #2.
DeepSeek V3.1 Terminus Thinking
#88 Best current rank: #88 in Long context, as of Oct 15, 2026.
| Category | Claude Opus 4.6 | DeepSeek V3.1 Terminus Thinking |
|---|---|---|
| General LLM | #4 · Near-SOTA · General LLM Margin 2.1276595744680833 LMArena leaderboard dataset · Oct 13, 2026 | #126 · #126 in General LLM Margin 67.02127659574468 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #2 · Near-SOTA · Reasoning Margin 1.5957446808510696 LMArena leaderboard dataset · Oct 13, 2026 | #113 · #113 in Reasoning Margin 60.638297872340424 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #11 · #11 in Math Margin 22.22222222222223 Epoch AI benchmarking hub · Feb 5, 2026 | — |
| Science | #32 · #32 in Science Margin — Epoch AI benchmarking hub · Feb 5, 2026 | — |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Web dev | #37 · Was SOTA · Coding › Web dev Margin 28.799999999999997 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #2 · Near-SOTA · Long context Margin 0.5319148936170421 LMArena leaderboard dataset · Oct 13, 2026 | #88 · #88 in Long context Margin 46.808510638297875 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | — |
| Factuality | #3 · Near-SOTA · Factuality Margin 2.3255813953488342 LMArena leaderboard dataset · Oct 13, 2026 | — |
Claude Opus 4.6: $10 per 1M blended tokens.
DeepSeek V3.1 Terminus Thinking: price per 1M tokens is unset in the catalog.
Claude Opus 4.6: closed weights.
DeepSeek V3.1 Terminus Thinking: open weights.
General LLM: As of Oct 15, 2026, Claude Opus 4.6 leads DeepSeek V3.1 Terminus Thinking in General LLM at #4 against #126.
Reasoning: As of Oct 15, 2026, Claude Opus 4.6 leads DeepSeek V3.1 Terminus Thinking in Reasoning at #2 against #113.
Long context: As of Oct 15, 2026, Claude Opus 4.6 leads DeepSeek V3.1 Terminus Thinking in Long context at #2 against #88.
Claude Opus 4.6 · DeepSeek V3.1 Terminus Thinking
Claude Opus 4.6 or DeepSeek V3.1 Terminus Thinking?
As of Oct 15, 2026, Claude Opus 4.6 leads DeepSeek V3.1 Terminus Thinking in 3 of 3 shared categories: General LLM, Reasoning, and Long context.
Claude Opus 4.6 or DeepSeek V3.1 Terminus Thinking for General LLM?
As of Oct 15, 2026, Claude Opus 4.6 leads DeepSeek V3.1 Terminus Thinking in General LLM at #4 against #126.
Claude Opus 4.6 or DeepSeek V3.1 Terminus Thinking for Reasoning?
As of Oct 15, 2026, Claude Opus 4.6 leads DeepSeek V3.1 Terminus Thinking in Reasoning at #2 against #113.
Claude Opus 4.6 or DeepSeek V3.1 Terminus Thinking for Long context?
As of Oct 15, 2026, Claude Opus 4.6 leads DeepSeek V3.1 Terminus Thinking in Long context at #2 against #88.