Claude Opus 4.6 vs DeepSeek V3.1 Terminus
As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V3.1 Terminus 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
#99 Best current rank: #99 in General LLM, as of Oct 14, 2026.
| Category | Claude Opus 4.6 | DeepSeek V3.1 Terminus |
|---|---|---|
| General LLM | #4 · Near-SOTA · General LLM Margin 2.7210884353741562 LMArena leaderboard dataset · Oct 13, 2026 | #99 · #99 in General LLM Margin 67.34693877551021 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #2 · Near-SOTA · Reasoning Margin 2.0547945205479436 LMArena leaderboard dataset · Oct 13, 2026 | #108 · #108 in Reasoning Margin 74.65753424657534 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 — Epoch AI benchmarking hub · Feb 5, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Web dev | #35 · Was SOTA · Coding › Web dev Margin 31.775700934579433 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #2 · Near-SOTA · Long context Margin 0.6802721088435391 LMArena leaderboard dataset · Oct 13, 2026 | #100 · #100 in Long context Margin 68.02721088435374 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | — |
| Factuality | #3 · Near-SOTA · Factuality Margin 2.9850746268656536 LMArena leaderboard dataset · Oct 13, 2026 | — |
Claude Opus 4.6: $10 per 1M blended tokens.
DeepSeek V3.1 Terminus: $0.4525 per 1M blended tokens.
Claude Opus 4.6: closed weights.
DeepSeek V3.1 Terminus: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V3.1 Terminus in General LLM at #4 against #99.
Reasoning: As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V3.1 Terminus in Reasoning at #2 against #108.
Long context: As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V3.1 Terminus in Long context at #2 against #100.
Claude Opus 4.6 · DeepSeek V3.1 Terminus
Claude Opus 4.6 or DeepSeek V3.1 Terminus?
As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V3.1 Terminus in 3 of 3 shared categories: General LLM, Reasoning, and Long context.
Claude Opus 4.6 or DeepSeek V3.1 Terminus for General LLM?
As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V3.1 Terminus in General LLM at #4 against #99.
Claude Opus 4.6 or DeepSeek V3.1 Terminus for Reasoning?
As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V3.1 Terminus in Reasoning at #2 against #108.
Claude Opus 4.6 or DeepSeek V3.1 Terminus for Long context?
As of Oct 14, 2026, Claude Opus 4.6 leads DeepSeek V3.1 Terminus in Long context at #2 against #100.