# Claude Opus 5 vs GPT-4.1 Nano

As of Oct 15, 2026, Claude Opus 5 leads GPT-4.1 Nano in 2 of 2 shared categories: Science and Abstraction (ARC).

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

GPT-4.1 Nano: $0.175 per 1M blended tokens.

Claude Opus 5: closed weights.

GPT-4.1 Nano: closed weights.

- Which to pick, Science: As of Oct 15, 2026, Claude Opus 5 leads GPT-4.1 Nano in Science at #12 against #129.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, Claude Opus 5 leads GPT-4.1 Nano in Abstraction (ARC) at #3 against #91.

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-4.1 Nano is ranked #91 in Abstraction (ARC) (since Oct 15, 2026; sources ARC-AGI; methodology v1.0).