# Claude Opus 4.6 vs DeepSeek V3.1 Terminus

As of Oct 15, 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: $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.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Opus 4.6 leads DeepSeek V3.1 Terminus in General LLM at #4 against #99.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Opus 4.6 leads DeepSeek V3.1 Terminus in Reasoning at #2 against #108.
- Which to pick, Long context: As of Oct 15, 2026, Claude Opus 4.6 leads DeepSeek V3.1 Terminus in Long context at #2 against #100.

As of Oct 15, 2026, Claude Opus 4.6 is near state of the art, rank #2 in Reasoning (since Oct 15, 2026; sources LMArena Text (style-controlled, hard prompts); methodology v1.0).

As of Oct 15, 2026, DeepSeek V3.1 Terminus is ranked #99 in General LLM (since Oct 15, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).