Claude Haiku 4.5 vs GPT-5.5
As of Oct 15, 2026, Claude Haiku 4.5 leads GPT-5.5 in 0 of 7 shared categories.
Claude Haiku 4.5
#78 Best recorded rank: #78 in Abstraction (ARC), as of Oct 15, 2026.
GPT-5.5
Close. Near-SOTA in Factuality, rank #5.
| Category | Claude Haiku 4.5 | GPT-5.5 |
|---|---|---|
| General LLM | #133 · #133 in General LLM Margin 70.74468085106383 LMArena leaderboard dataset · Oct 13, 2026 | #22 · Was SOTA · General LLM Margin 11.702127659574472 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #119 · #119 in Reasoning Margin 63.829787234042556 LMArena leaderboard dataset · Oct 13, 2026 | #26 · #26 in Reasoning Margin 14.36170212765957 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 | #30 · #30 in Science Margin — Epoch AI benchmarking hub · Apr 23, 2026 |
| Coding | #— · Not enough data Margin — Scale Labs leaderboards · Oct 14, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Web dev | #103 · #103 in Coding › Web dev Margin 81.6 LMArena leaderboard dataset · Oct 13, 2026 | #48 · #48 in Coding › Web dev Margin 37.6 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #107 · #107 in Long context Margin 56.91489361702128 LMArena leaderboard dataset · Oct 13, 2026 | #26 · Was SOTA · Long context Margin 13.829787234042556 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | — | #10 · Was SOTA · Vision Margin 28.94736842105263 Epoch AI benchmarking hub · Apr 23, 2026 |
| Factuality | #125 · #125 in Factuality Margin 73.25581395348837 LMArena leaderboard dataset · Oct 13, 2026 | #5 · Near-SOTA · Factuality Margin 3.4883720930232442 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #78 · #78 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Oct 15, 2025 | #7 · #7 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Apr 23, 2026 |
Claude Haiku 4.5: $2.0000000000000004 per 1M blended tokens.
GPT-5.5: $11.25 per 1M blended tokens.
Claude Haiku 4.5: closed weights.
GPT-5.5: closed weights.
General LLM: As of Oct 15, 2026, GPT-5.5 leads Claude Haiku 4.5 in General LLM at #22 against #133.
Reasoning: As of Oct 15, 2026, GPT-5.5 leads Claude Haiku 4.5 in Reasoning at #26 against #119.
Science: As of Oct 15, 2026, GPT-5.5 leads Claude Haiku 4.5 in Science at #30 against #109.
Coding › Web dev: As of Oct 15, 2026, GPT-5.5 leads Claude Haiku 4.5 in Coding › Web dev at #48 against #103.
Long context: As of Oct 15, 2026, GPT-5.5 leads Claude Haiku 4.5 in Long context at #26 against #107.
Factuality: As of Oct 15, 2026, GPT-5.5 leads Claude Haiku 4.5 in Factuality at #5 against #125.
Abstraction (ARC): As of Oct 15, 2026, GPT-5.5 leads Claude Haiku 4.5 in Abstraction (ARC) at #7 against #78.
Claude Haiku 4.5 or GPT-5.5?
As of Oct 15, 2026, Claude Haiku 4.5 leads GPT-5.5 in 0 of 7 shared categories.
Claude Haiku 4.5 or GPT-5.5 for General LLM?
As of Oct 15, 2026, GPT-5.5 leads Claude Haiku 4.5 in General LLM at #22 against #133.
Claude Haiku 4.5 or GPT-5.5 for Reasoning?
As of Oct 15, 2026, GPT-5.5 leads Claude Haiku 4.5 in Reasoning at #26 against #119.
Claude Haiku 4.5 or GPT-5.5 for Science?
As of Oct 15, 2026, GPT-5.5 leads Claude Haiku 4.5 in Science at #30 against #109.