# Claude Haiku 5.5 vs Claude Opus 5.5

As of Oct 14, 2026, Claude Haiku 5.5 leads Claude Opus 5.5 in 0 of 2 shared categories.

Claude Haiku 5.5: $0.19999999999999998 per 1M blended tokens.

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

Claude Haiku 5.5: closed weights.

Claude Opus 5.5: closed weights.

- Which to pick, Science: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Haiku 5.5 in Science at #31 against #38.
- Which to pick, Coding › Web dev: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Haiku 5.5 in Coding › Web dev at #1 against #26.

As of Oct 14, 2026, Claude Haiku 5.5 is state of the art on best per dollar in Math (since Oct 14, 2026; sources Humanity's Last Exam; methodology v1.0).

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).