# GPT-5.4 Nano vs GPT-5.5

As of Oct 15, 2026, GPT-5.4 Nano leads GPT-5.5 in 0 of 6 shared categories.

GPT-5.4 Nano: $0.4625 per 1M blended tokens.

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

GPT-5.4 Nano: closed weights.

GPT-5.5: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, GPT-5.5 leads GPT-5.4 Nano in General LLM at #22 against #149.
- Which to pick, Reasoning: As of Oct 15, 2026, GPT-5.5 leads GPT-5.4 Nano in Reasoning at #26 against #143.
- Which to pick, Science: As of Oct 15, 2026, GPT-5.5 leads GPT-5.4 Nano in Science at #30 against #73.
- Which to pick, Long context: As of Oct 15, 2026, GPT-5.5 leads GPT-5.4 Nano in Long context at #26 against #157.
- Which to pick, Factuality: As of Oct 15, 2026, GPT-5.5 leads GPT-5.4 Nano in Factuality at #5 against #126.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, GPT-5.5 leads GPT-5.4 Nano in Abstraction (ARC) at #7 against #43.

As of Oct 15, 2026, GPT-5.4 Nano is ranked #43 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).