Claude Opus 5.5 vs GPT-5.4 Nano
As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 Nano in 6 of 6 shared categories: General LLM, Reasoning, Science, 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 Nano
#43 Best recorded rank: #43 in Abstraction (ARC), as of Oct 15, 2026.
| Category | Claude Opus 5.5 | GPT-5.4 Nano |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.0638297872340416 LMArena leaderboard dataset · Oct 13, 2026 | #149 · #149 in General LLM Margin 79.25531914893617 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #143 · #143 in Reasoning Margin 76.59574468085106 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 | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #73 · #73 in Science Margin — Epoch AI benchmarking hub · Mar 17, 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 | — |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #157 · #157 in Long context Margin 83.51063829787233 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 | #126 · #126 in Factuality Margin 73.83720930232558 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #43 · #43 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Mar 17, 2026 |
Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.
GPT-5.4 Nano: $0.4625 per 1M blended tokens.
Claude Opus 5.5: closed weights.
GPT-5.4 Nano: closed weights.
General LLM: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 Nano in General LLM at #2 against #149.
Reasoning: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 Nano in Reasoning at #1 against #143.
Science: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 Nano in Science at #31 against #73.
Long context: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 Nano in Long context at #1 against #157.
Factuality: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 Nano in Factuality at #1 against #126.
Abstraction (ARC): As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 Nano in Abstraction (ARC) at #1 against #43.
Claude Opus 5.5 · GPT-5.4 Nano
Claude Opus 5.5 or GPT-5.4 Nano?
As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 Nano in 6 of 6 shared categories: General LLM, Reasoning, Science, Long context, Factuality, and Abstraction (ARC).
Claude Opus 5.5 or GPT-5.4 Nano for General LLM?
As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 Nano in General LLM at #2 against #149.
Claude Opus 5.5 or GPT-5.4 Nano for Reasoning?
As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 Nano in Reasoning at #1 against #143.
Claude Opus 5.5 or GPT-5.4 Nano for Science?
As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 Nano in Science at #31 against #73.