# Claude Opus 5.5 vs Magistral Small 2506

As of Oct 14, 2026, Claude Opus 5.5 leads Magistral Small 2506 in 2 of 2 shared categories: Science and Abstraction (ARC).

Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.

Magistral Small 2506: price per 1M tokens is unset in the catalog.

Claude Opus 5.5: closed weights.

Magistral Small 2506: closed weights.

- Which to pick, Science: As of Oct 14, 2026, Claude Opus 5.5 leads Magistral Small 2506 in Science at #31 against #116.
- Which to pick, Abstraction (ARC): As of Oct 14, 2026, Claude Opus 5.5 leads Magistral Small 2506 in Abstraction (ARC) at #1 against #86.

As of Oct 14, 2026, Claude Opus 5.5 is tied for state of the art in Reasoning (since Oct 2, 2026; sources LMArena Text (style-controlled, hard prompts); methodology v1.0).

As of Oct 14, 2026, Magistral Small 2506 is ranked #86 in Abstraction (ARC) (since Oct 14, 2026; sources ARC-AGI; methodology v1.0).