Claude Opus 5.5 vs GPT-5
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5 in 7 of 7 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, Factuality, and Abstraction (ARC).
Claude Opus 5.5
Yes. SOTA in co-SOTA in Reasoning, co-SOTA in Coding, co-SOTA in Coding › Agentic, Coding › Web dev, co-SOTA in Long context and co-SOTA in Factuality.
GPT-5
It used to be. Was SOTA in General LLM.
| Category | Claude Opus 5.5 | GPT-5 |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.3605442176870781 LMArena leaderboard dataset · Oct 13, 2026 | #76 · Was SOTA · General LLM Margin 51.70068027210884 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #78 · Was SOTA · Reasoning Margin 54.10958904109589 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #15 · Was SOTA · Math Margin 31.111111111111114 Epoch AI benchmarking hub · Aug 7, 2025 |
| Science | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #54 · #54 in Science Margin — Epoch AI benchmarking hub · Aug 7, 2025 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Aug 7, 2025 |
| 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 | #66 · #66 in Coding › Web dev Margin 60.74766355140187 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #107 · Was SOTA · Long context Margin 72.78911564625851 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 | #93 · #93 in Factuality Margin 70.14925373134328 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #34 · #34 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Aug 7, 2025 |
Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.
GPT-5: $3.4375000000000004 per 1M blended tokens.
Claude Opus 5.5: closed weights.
GPT-5: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5 in General LLM at #2 against #76.
Reasoning: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5 in Reasoning at #1 against #78.
Science: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5 in Science at #31 against #54.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5 in Coding › Web dev at #1 against #66.
Long context: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5 in Long context at #1 against #107.
Factuality: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5 in Factuality at #1 against #93.
Abstraction (ARC): As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5 in Abstraction (ARC) at #1 against #34.
Claude Opus 5.5 or GPT-5?
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5 in 7 of 7 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, Factuality, and Abstraction (ARC).
Claude Opus 5.5 or GPT-5 for General LLM?
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5 in General LLM at #2 against #76.
Claude Opus 5.5 or GPT-5 for Reasoning?
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5 in Reasoning at #1 against #78.
Claude Opus 5.5 or GPT-5 for Science?
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5 in Science at #31 against #54.