# Claude Haiku 4.5 vs Claude Sonnet 5.5

As of Oct 15, 2026, Claude Haiku 4.5 leads Claude Sonnet 5.5 in 0 of 6 shared categories.

Claude Haiku 4.5: $2.0000000000000004 per 1M blended tokens.

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

Claude Haiku 4.5: closed weights.

Claude Sonnet 5.5: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Sonnet 5.5 leads Claude Haiku 4.5 in General LLM at #29 against #133.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Sonnet 5.5 leads Claude Haiku 4.5 in Reasoning at #18 against #119.
- Which to pick, Science: As of Oct 15, 2026, Claude Sonnet 5.5 leads Claude Haiku 4.5 in Science at #3 against #109.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Sonnet 5.5 leads Claude Haiku 4.5 in Coding › Web dev at #3 against #103.
- Which to pick, Long context: As of Oct 15, 2026, Claude Sonnet 5.5 leads Claude Haiku 4.5 in Long context at #11 against #107.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Sonnet 5.5 leads Claude Haiku 4.5 in Factuality at #17 against #125.

As of Oct 15, 2026, Claude Haiku 4.5 is ranked #78 in Abstraction (ARC) (since Oct 15, 2026; sources ARC-AGI; 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).