Claude Haiku 5.5 vs Claude Opus 5
As of Oct 14, 2026, Claude Haiku 5.5 leads Claude Opus 5 in 0 of 2 shared categories.
Claude Haiku 5.5
Yes. Yes on Math (best per dollar). Not the overall leader.
Claude Opus 5
Close. Near-SOTA in Factuality, rank #4.
| Category | Claude Haiku 5.5 | Claude Opus 5 |
|---|---|---|
| General LLM | — | #11 · Was SOTA · General LLM Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | — | #9 · Was SOTA · Reasoning Margin 6.849315068493155 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #13 · #13 in Math Margin 26.66666666666667 Epoch AI benchmarking hub · Oct 7, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #38 · #38 in Science Margin — Epoch AI benchmarking hub · Oct 7, 2026 | #12 · #12 in Science Margin — Epoch AI benchmarking hub · Jul 24, 2026 |
| Coding | #— · Not enough data Margin — Scale Labs leaderboards · Oct 14, 2026 | #4 · #4 in Coding Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | — | #4 · #4 in Coding › Agentic Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Web dev | #26 · #26 in Coding › Web dev Margin 23.364485981308405 LMArena leaderboard dataset · Oct 13, 2026 | #6 · Was SOTA · Coding › Web dev Margin 4.672897196261687 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | — | #9 · Was SOTA · Long context Margin 6.122448979591837 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | — | #12 · #12 in Vision Margin 36.8421052631579 Epoch AI benchmarking hub · Jul 24, 2026 |
| Factuality | — | #4 · Near-SOTA · Factuality Margin 3.731343283582092 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 24, 2026 |
Claude Haiku 5.5: $0.19999999999999998 per 1M blended tokens.
Claude Opus 5: $10 per 1M blended tokens.
Claude Haiku 5.5: closed weights.
Claude Opus 5: closed weights.
Science: As of Oct 14, 2026, Claude Opus 5 leads Claude Haiku 5.5 in Science at #12 against #38.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 5 leads Claude Haiku 5.5 in Coding › Web dev at #6 against #26.
Claude Haiku 5.5 · Claude Opus 5
Claude Haiku 5.5 or Claude Opus 5?
As of Oct 14, 2026, Claude Haiku 5.5 leads Claude Opus 5 in 0 of 2 shared categories.
Claude Haiku 5.5 or Claude Opus 5 for Science?
As of Oct 14, 2026, Claude Opus 5 leads Claude Haiku 5.5 in Science at #12 against #38.
Claude Haiku 5.5 or Claude Opus 5 for Coding › Web dev?
As of Oct 14, 2026, Claude Opus 5 leads Claude Haiku 5.5 in Coding › Web dev at #6 against #26.