# Claude Sonnet 5.5 vs DeepSeek V4 Pro High Preview

As of Oct 14, 2026, Claude Sonnet 5.5 leads DeepSeek V4 Pro High Preview in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.

Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.

DeepSeek V4 Pro High Preview: price per 1M tokens is unset in the catalog.

Claude Sonnet 5.5: closed weights.

DeepSeek V4 Pro High Preview: open weights.

- Which to pick, General LLM: As of Oct 14, 2026, Claude Sonnet 5.5 leads DeepSeek V4 Pro High Preview in General LLM at #27 against #51.
- Which to pick, Reasoning: As of Oct 14, 2026, Claude Sonnet 5.5 leads DeepSeek V4 Pro High Preview in Reasoning at #18 against #56.
- Which to pick, Coding › Web dev: As of Oct 14, 2026, Claude Sonnet 5.5 leads DeepSeek V4 Pro High Preview in Coding › Web dev at #3 against #54.
- Which to pick, Long context: As of Oct 14, 2026, Claude Sonnet 5.5 leads DeepSeek V4 Pro High Preview in Long context at #11 against #51.
- Which to pick, Factuality: As of Oct 14, 2026, Claude Sonnet 5.5 leads DeepSeek V4 Pro High Preview in Factuality at #16 against #52.

As of Oct 14, 2026, Claude Sonnet 5.5 is tied for state of the art in Coding (since Oct 6, 2026; sources Terminal-Bench 4.0; methodology v1.0).

As of Oct 14, 2026, DeepSeek V4 Pro High Preview is ranked #51 in General LLM (since Oct 14, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).