# Claude Opus 5 vs GPT-5.4 Nano

As of Oct 15, 2026, Claude Opus 5 leads GPT-5.4 Nano in 6 of 6 shared categories: General LLM, Reasoning, Science, Long context, Factuality, and Abstraction (ARC).

Claude Opus 5: $10 per 1M blended tokens.

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

Claude Opus 5: closed weights.

GPT-5.4 Nano: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Opus 5 leads GPT-5.4 Nano in General LLM at #11 against #149.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Opus 5 leads GPT-5.4 Nano in Reasoning at #9 against #143.
- Which to pick, Science: As of Oct 15, 2026, Claude Opus 5 leads GPT-5.4 Nano in Science at #12 against #73.
- Which to pick, Long context: As of Oct 15, 2026, Claude Opus 5 leads GPT-5.4 Nano in Long context at #9 against #157.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Opus 5 leads GPT-5.4 Nano in Factuality at #4 against #126.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, Claude Opus 5 leads GPT-5.4 Nano in Abstraction (ARC) at #3 against #43.

As of Oct 15, 2026, Claude Opus 5 is near state of the art, rank #4 in Factuality (since Oct 15, 2026; sources LMArena Text factuality; methodology v1.0).

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).