# Claude Sonnet 5.5 vs DeepSeek V3

As of Oct 15, 2026, Claude Sonnet 5.5 leads DeepSeek V3 in 2 of 3 shared categories: Science and Long context.

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

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

Claude Sonnet 5.5: closed weights.

DeepSeek V3: open weights.

- Which to pick, General LLM: As of Oct 15, 2026, DeepSeek V3 leads Claude Sonnet 5.5 in General LLM at #12 against #29.
- Which to pick, Science: As of Oct 15, 2026, Claude Sonnet 5.5 leads DeepSeek V3 in Science at #3 against #114.
- Which to pick, Long context: As of Oct 15, 2026, Claude Sonnet 5.5 leads DeepSeek V3 in Long context at #11 against #185.

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 V3 is a former state-of-the-art holder in General LLM (since Jan 5, 2025; sources LMArena Text (style-controlled, overall); methodology v1.0).