# GPT-5.4 vs GPT-5.6 Luna

As of Oct 15, 2026, GPT-5.4 leads GPT-5.6 Luna in 6 of 7 shared categories: General LLM, Reasoning, Science, Long context, Factuality, and Abstraction (ARC).

GPT-5.4: $5.625 per 1M blended tokens.

GPT-5.6 Luna: $0.44999999999999996 per 1M blended tokens.

GPT-5.4: closed weights.

GPT-5.6 Luna: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, GPT-5.4 leads GPT-5.6 Luna in General LLM at #28 against #53.
- Which to pick, Reasoning: As of Oct 15, 2026, GPT-5.4 leads GPT-5.6 Luna in Reasoning at #29 against #55.
- Which to pick, Science: As of Oct 15, 2026, GPT-5.4 leads GPT-5.6 Luna in Science at #16 against #25.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, GPT-5.6 Luna leads GPT-5.4 in Coding › Web dev at #43 against #55.
- Which to pick, Long context: As of Oct 15, 2026, GPT-5.4 leads GPT-5.6 Luna in Long context at #34 against #65.
- Which to pick, Factuality: As of Oct 15, 2026, GPT-5.4 leads GPT-5.6 Luna in Factuality at #6 against #35.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, GPT-5.4 leads GPT-5.6 Luna in Abstraction (ARC) at #10 against #19.

As of Oct 15, 2026, GPT-5.4 is a former state-of-the-art holder in General LLM (since Apr 10, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).

As of Oct 15, 2026, GPT-5.6 Luna is ranked #16 in Coding (since Oct 15, 2026; sources Terminal-Bench 4.0; methodology v1.0).