Claude Opus 5.5 vs GPT-5.4
As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 in 6 of 7 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, Factuality, and Abstraction (ARC).
Claude Opus 5.5
Yes. SOTA in Reasoning (tied), Coding (tied), Coding › Agentic (tied), Coding › Web dev, Long context (tied), and Factuality (tied).
GPT-5.4
It used to be. Was SOTA in General LLM.
| Category | Claude Opus 5.5 | GPT-5.4 |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.0638297872340416 LMArena leaderboard dataset · Oct 13, 2026 | #30 · Was SOTA · General LLM Margin 15.957446808510639 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #32 · #32 in Reasoning Margin 17.55319148936171 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #9 · #9 in Math Margin 17.777777777777757 Epoch AI benchmarking hub · Mar 5, 2026 |
| Science | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #16 · #16 in Science Margin — Epoch AI benchmarking hub · Mar 5, 2026 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #1 · SOTA · Coding › Web dev Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #60 · #60 in Coding › Web dev Margin 47.2 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #40 · #40 in Long context Margin 21.276595744680847 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #6 · Was SOTA · Factuality Margin 4.0697674418604635 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #10 · #10 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Mar 5, 2026 |
Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.
GPT-5.4: $5.625 per 1M blended tokens.
Claude Opus 5.5: closed weights.
GPT-5.4: closed weights.
General LLM: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 in General LLM at #2 against #30.
Reasoning: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 in Reasoning at #1 against #32.
Science: As of Oct 15, 2026, GPT-5.4 leads Claude Opus 5.5 in Science at #16 against #31.
Coding › Web dev: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 in Coding › Web dev at #1 against #60.
Long context: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 in Long context at #1 against #40.
Factuality: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 in Factuality at #1 against #6.
Abstraction (ARC): As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 in Abstraction (ARC) at #1 against #10.
Claude Opus 5.5 or GPT-5.4?
As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 in 6 of 7 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, Factuality, and Abstraction (ARC).
Claude Opus 5.5 or GPT-5.4 for General LLM?
As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 in General LLM at #2 against #30.
Claude Opus 5.5 or GPT-5.4 for Reasoning?
As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 in Reasoning at #1 against #32.
Claude Opus 5.5 or GPT-5.4 for Science?
As of Oct 15, 2026, GPT-5.4 leads Claude Opus 5.5 in Science at #16 against #31.