Claude Opus 5 vs GPT-4.5 Preview
As of Oct 14, 2026, Claude Opus 5 leads GPT-4.5 Preview in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Abstraction (ARC).
Claude Opus 5
Close. Near-SOTA in Factuality, rank #4.
GPT-4.5 Preview
It used to be. Was SOTA in General LLM.
| Category | Claude Opus 5 | GPT-4.5 Preview |
|---|---|---|
| General LLM | #11 · Was SOTA · General LLM Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #62 · Was SOTA · General LLM Margin 42.17687074829932 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #9 · Was SOTA · Reasoning Margin 6.849315068493155 LMArena leaderboard dataset · Oct 13, 2026 | #93 · Was SOTA · Reasoning Margin 64.38356164383562 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #38 · #38 in Math Margin 84.44444444444444 Epoch AI benchmarking hub · Feb 27, 2025 |
| Science | #12 · #12 in Science Margin — Epoch AI benchmarking hub · Jul 24, 2026 | #92 · #92 in Science Margin — Epoch AI benchmarking hub · Feb 27, 2025 |
| Coding | #4 · #4 in Coding Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #4 · #4 in Coding › Agentic Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #6 · Was SOTA · Coding › Web dev Margin 4.672897196261687 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #9 · Was SOTA · Long context Margin 6.122448979591837 LMArena leaderboard dataset · Oct 13, 2026 | #76 · Was SOTA · Long context Margin 51.70068027210884 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #12 · #12 in Vision Margin 36.8421052631579 Epoch AI benchmarking hub · Jul 24, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #4 · Near-SOTA · Factuality Margin 3.731343283582092 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 24, 2026 | #83 · #83 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Feb 27, 2025 |
Claude Opus 5: $10 per 1M blended tokens.
GPT-4.5 Preview: price per 1M tokens is unset in the catalog.
Claude Opus 5: closed weights.
GPT-4.5 Preview: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 5 leads GPT-4.5 Preview in General LLM at #11 against #62.
Reasoning: As of Oct 14, 2026, Claude Opus 5 leads GPT-4.5 Preview in Reasoning at #9 against #93.
Science: As of Oct 14, 2026, Claude Opus 5 leads GPT-4.5 Preview in Science at #12 against #92.
Long context: As of Oct 14, 2026, Claude Opus 5 leads GPT-4.5 Preview in Long context at #9 against #76.
Abstraction (ARC): As of Oct 14, 2026, Claude Opus 5 leads GPT-4.5 Preview in Abstraction (ARC) at #3 against #83.
Claude Opus 5 · GPT-4.5 Preview
Claude Opus 5 or GPT-4.5 Preview?
As of Oct 14, 2026, Claude Opus 5 leads GPT-4.5 Preview in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Abstraction (ARC).
Claude Opus 5 or GPT-4.5 Preview for General LLM?
As of Oct 14, 2026, Claude Opus 5 leads GPT-4.5 Preview in General LLM at #11 against #62.
Claude Opus 5 or GPT-4.5 Preview for Reasoning?
As of Oct 14, 2026, Claude Opus 5 leads GPT-4.5 Preview in Reasoning at #9 against #93.
Claude Opus 5 or GPT-4.5 Preview for Science?
As of Oct 14, 2026, Claude Opus 5 leads GPT-4.5 Preview in Science at #12 against #92.