# Claude Sonnet 4.6 vs DeepSeek V4.1 Flash

As of Oct 14, 2026, Claude Sonnet 4.6 leads DeepSeek V4.1 Flash in 2 of 8 shared categories: Reasoning and Long context.

Claude Sonnet 4.6: $6 per 1M blended tokens.

DeepSeek V4.1 Flash: $0.23463 per 1M blended tokens.

Claude Sonnet 4.6: closed weights.

DeepSeek V4.1 Flash: open weights.

- Which to pick, General LLM: As of Oct 14, 2026, DeepSeek V4.1 Flash leads Claude Sonnet 4.6 in General LLM at #29 against #32.
- Which to pick, Reasoning: As of Oct 14, 2026, Claude Sonnet 4.6 leads DeepSeek V4.1 Flash in Reasoning at #20 against #27.
- Which to pick, Science: As of Oct 14, 2026, DeepSeek V4.1 Flash leads Claude Sonnet 4.6 in Science at #36 against #50.
- Which to pick, Coding › Web dev: As of Oct 14, 2026, DeepSeek V4.1 Flash leads Claude Sonnet 4.6 in Coding › Web dev at #19 against #41.
- Which to pick, Long context: As of Oct 14, 2026, Claude Sonnet 4.6 leads DeepSeek V4.1 Flash in Long context at #20 against #32.
- Which to pick, Vision: As of Oct 14, 2026, DeepSeek V4.1 Flash leads Claude Sonnet 4.6 in Vision at #21 against #23.
- Which to pick, Factuality: As of Oct 14, 2026, DeepSeek V4.1 Flash leads Claude Sonnet 4.6 in Factuality at #22 against #34.
- Which to pick, Abstraction (ARC): As of Oct 14, 2026, DeepSeek V4.1 Flash leads Claude Sonnet 4.6 in Abstraction (ARC) at #8 against #23.

As of Oct 14, 2026, Claude Sonnet 4.6 is a former state-of-the-art holder in Long context (since Mar 19, 2026; sources LMArena Text (style-controlled, longer query); methodology v1.0).

As of Oct 14, 2026, DeepSeek V4.1 Flash is state of the art on best per dollar in General LLM (since Oct 14, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).