# Claude Sonnet 5.5 vs DeepSeek V4 Pro High

As of Oct 15, 2026, Claude Sonnet 5.5 leads DeepSeek V4 Pro High 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: price per 1M tokens is unset in the catalog.

Claude Sonnet 5.5: closed weights.

DeepSeek V4 Pro High: open weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Sonnet 5.5 leads DeepSeek V4 Pro High in General LLM at #29 against #49.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Sonnet 5.5 leads DeepSeek V4 Pro High in Reasoning at #18 against #52.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Sonnet 5.5 leads DeepSeek V4 Pro High in Coding › Web dev at #3 against #30.
- Which to pick, Long context: As of Oct 15, 2026, Claude Sonnet 5.5 leads DeepSeek V4 Pro High in Long context at #11 against #47.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Sonnet 5.5 leads DeepSeek V4 Pro High in Factuality at #17 against #51.

As of Oct 15, 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 15, 2026, DeepSeek V4 Pro High is ranked #30 in Coding › Web dev (since Oct 15, 2026; sources LMArena WebDev; methodology v1.0).