# DeepSeek R1 vs GPT-5.5

As of Oct 15, 2026, DeepSeek R1 leads GPT-5.5 in 0 of 5 shared categories.

DeepSeek R1: $1.15 per 1M blended tokens.

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

DeepSeek R1: open weights.

GPT-5.5: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, GPT-5.5 leads DeepSeek R1 in General LLM at #22 against #153.
- Which to pick, Reasoning: As of Oct 15, 2026, GPT-5.5 leads DeepSeek R1 in Reasoning at #26 against #151.
- Which to pick, Science: As of Oct 15, 2026, GPT-5.5 leads DeepSeek R1 in Science at #30 against #90.
- Which to pick, Long context: As of Oct 15, 2026, GPT-5.5 leads DeepSeek R1 in Long context at #26 against #160.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, GPT-5.5 leads DeepSeek R1 in Abstraction (ARC) at #7 against #77.

As of Oct 15, 2026, DeepSeek R1 is a former state-of-the-art holder in General LLM (since Jan 28, 2025; sources LMArena Text (style-controlled, overall); 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).