# DeepSeek V4.1 Flash vs GPT-5.4 Pro

As of Oct 15, 2026, DeepSeek V4.1 Flash leads GPT-5.4 Pro in 0 of 2 shared categories.

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

GPT-5.4 Pro: $67.5 per 1M blended tokens.

DeepSeek V4.1 Flash: open weights.

GPT-5.4 Pro: closed weights.

- Which to pick, Science: As of Oct 15, 2026, GPT-5.4 Pro leads DeepSeek V4.1 Flash in Science at #6 against #36.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, DeepSeek V4.1 Flash and GPT-5.4 Pro share #8 in Abstraction (ARC).

As of Oct 15, 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).

As of Oct 15, 2026, GPT-5.4 Pro is a former state-of-the-art holder in Math (since Apr 16, 2026; sources Humanity's Last Exam; methodology v1.0).