# DeepSeek V4 Flash 0731 vs GPT-5.5

As of Oct 15, 2026, DeepSeek V4 Flash 0731 leads GPT-5.5 in 1 of 2 shared categories: Science.

DeepSeek V4 Flash 0731: $0.17200000000000001 per 1M blended tokens.

GPT-5.5: $11.25 per 1M blended tokens.

DeepSeek V4 Flash 0731: closed weights.

GPT-5.5: closed weights.

- Which to pick, Science: As of Oct 15, 2026, DeepSeek V4 Flash 0731 leads GPT-5.5 in Science at #27 against #30.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, GPT-5.5 leads DeepSeek V4 Flash 0731 in Abstraction (ARC) at #7 against #18.

As of Oct 15, 2026, DeepSeek V4 Flash 0731 is ranked #18 in Abstraction (ARC) (since Oct 15, 2026; sources ARC-AGI; methodology v1.0).

As of Oct 15, 2026, GPT-5.5 is near state of the art, rank #5 in Factuality (since Oct 15, 2026; sources LMArena Text factuality; methodology v1.0).