# Claude Haiku 5.5 vs Claude Sonnet 5.5

As of Oct 15, 2026, Claude Haiku 5.5 leads Claude Sonnet 5.5 in 0 of 3 shared categories.

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

Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.

Claude Haiku 5.5: closed weights.

Claude Sonnet 5.5: closed weights.

- Which to pick, Math: As of Oct 15, 2026, Claude Sonnet 5.5 leads Claude Haiku 5.5 in Math at #4 against #13.
- Which to pick, Science: As of Oct 15, 2026, Claude Sonnet 5.5 leads Claude Haiku 5.5 in Science at #3 against #38.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Sonnet 5.5 leads Claude Haiku 5.5 in Coding › Web dev at #3 against #28.

As of Oct 15, 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 15, 2026, Claude Sonnet 5.5 is tied for state of the art in Coding (since Oct 6, 2026; sources Terminal-Bench 4.0; methodology v1.0).