# Claude Opus 5 vs Claude Sonnet 4 20250514

As of Oct 14, 2026, Claude Opus 5 leads Claude Sonnet 4 20250514 in 2 of 2 shared categories: Science and Abstraction (ARC).

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

Claude Sonnet 4 20250514: price per 1M tokens is unset in the catalog.

Claude Opus 5: closed weights.

Claude Sonnet 4 20250514: closed weights.

- Which to pick, Science: As of Oct 14, 2026, Claude Opus 5 leads Claude Sonnet 4 20250514 in Science at #12 against #74.
- Which to pick, Abstraction (ARC): As of Oct 14, 2026, Claude Opus 5 leads Claude Sonnet 4 20250514 in Abstraction (ARC) at #3 against #49.

As of Oct 14, 2026, Claude Opus 5 is near state of the art, rank #4 in Factuality (since Oct 14, 2026; sources LMArena Text factuality; methodology v1.0).

As of Oct 14, 2026, Claude Sonnet 4 20250514 is ranked #49 in Abstraction (ARC) (since Oct 14, 2026; sources ARC-AGI; methodology v1.0).