# Claude Opus 5 vs DeepSeek V3.1 Thinking

As of Oct 15, 2026, Claude Opus 5 leads DeepSeek V3.1 Thinking in 3 of 3 shared categories: General LLM, Reasoning, and Long context.

Claude Opus 5: $10 per 1M blended tokens.

DeepSeek V3.1 Thinking: price per 1M tokens is unset in the catalog.

Claude Opus 5: closed weights.

DeepSeek V3.1 Thinking: open weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Opus 5 leads DeepSeek V3.1 Thinking in General LLM at #11 against #98.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Opus 5 leads DeepSeek V3.1 Thinking in Reasoning at #9 against #96.
- Which to pick, Long context: As of Oct 15, 2026, Claude Opus 5 leads DeepSeek V3.1 Thinking in Long context at #9 against #73.

As of Oct 15, 2026, Claude Opus 5 is near state of the art, rank #4 in Factuality (since Oct 15, 2026; sources LMArena Text factuality; methodology v1.0).

As of Oct 15, 2026, DeepSeek V3.1 Thinking is ranked #73 in Long context (since Oct 15, 2026; sources LMArena Text (style-controlled, longer query); methodology v1.0).