Claude Haiku 4.5 vs O3 Mini
As of Oct 14, 2026, Claude Haiku 4.5 leads O3 Mini in 2 of 5 shared categories: Reasoning and Long context.
Claude Haiku 4.5
#78 Best recorded rank: #78 in Abstraction (ARC), as of Oct 14, 2026.
O3 Mini
It used to be. Was SOTA in Reasoning.
| Category | Claude Haiku 4.5 | O3 Mini |
|---|---|---|
| General LLM | #104 · #104 in General LLM Margin 70.74829931972789 LMArena leaderboard dataset · Oct 13, 2026 | #7 · #7 in General LLM Margin — LMArena leaderboard dataset · Apr 16, 2025 |
| Reasoning | #91 · #91 in Reasoning Margin 63.013698630136986 LMArena leaderboard dataset · Oct 13, 2026 | #133 · Was SOTA · Reasoning Margin 91.78082191780823 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #109 · #109 in Science Margin — Epoch AI benchmarking hub · Oct 15, 2025 | #76 · #76 in Science Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Coding | #— · Not enough data Margin — Scale Labs leaderboards · Oct 14, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Web dev | #92 · #92 in Coding › Web dev Margin 85.04672897196262 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #84 · #84 in Long context Margin 57.142857142857146 LMArena leaderboard dataset · Oct 13, 2026 | #145 · #145 in Long context Margin 98.63945578231292 LMArena leaderboard dataset · Oct 13, 2026 |
| Factuality | #97 · #97 in Factuality Margin 73.13432835820896 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Abstraction (ARC) | #78 · #78 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Oct 15, 2025 | #51 · #51 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
Claude Haiku 4.5: $2.0000000000000004 per 1M blended tokens.
O3 Mini: $1.9250000000000003 per 1M blended tokens.
Claude Haiku 4.5: closed weights.
O3 Mini: closed weights.
General LLM: As of Oct 14, 2026, O3 Mini leads Claude Haiku 4.5 in General LLM at #7 against #104.
Reasoning: As of Oct 14, 2026, Claude Haiku 4.5 leads O3 Mini in Reasoning at #91 against #133.
Science: As of Oct 14, 2026, O3 Mini leads Claude Haiku 4.5 in Science at #76 against #109.
Long context: As of Oct 14, 2026, Claude Haiku 4.5 leads O3 Mini in Long context at #84 against #145.
Abstraction (ARC): As of Oct 14, 2026, O3 Mini leads Claude Haiku 4.5 in Abstraction (ARC) at #51 against #78.
Claude Haiku 4.5 or O3 Mini?
As of Oct 14, 2026, Claude Haiku 4.5 leads O3 Mini in 2 of 5 shared categories: Reasoning and Long context.
Claude Haiku 4.5 or O3 Mini for General LLM?
As of Oct 14, 2026, O3 Mini leads Claude Haiku 4.5 in General LLM at #7 against #104.
Claude Haiku 4.5 or O3 Mini for Reasoning?
As of Oct 14, 2026, Claude Haiku 4.5 leads O3 Mini in Reasoning at #91 against #133.
Claude Haiku 4.5 or O3 Mini for Science?
As of Oct 14, 2026, O3 Mini leads Claude Haiku 4.5 in Science at #76 against #109.