Claude Opus 4.6 vs GPT-4.5 Preview
As of Oct 15, 2026, Claude Opus 4.6 leads GPT-4.5 Preview in 5 of 5 shared categories: General LLM, Reasoning, Math, Science, and Long context.
Claude Opus 4.6
Close. Near-SOTA in Reasoning, rank #2.
GPT-4.5 Preview
It used to be. Was SOTA in General LLM.
| Category | Claude Opus 4.6 | GPT-4.5 Preview |
|---|---|---|
| General LLM | #4 · Near-SOTA · General LLM Margin 2.1276595744680833 LMArena leaderboard dataset · Oct 13, 2026 | #79 · Was SOTA · General LLM Margin 42.02127659574468 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #2 · Near-SOTA · Reasoning Margin 1.5957446808510696 LMArena leaderboard dataset · Oct 13, 2026 | #121 · Was SOTA · Reasoning Margin 64.8936170212766 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #11 · #11 in Math Margin 22.22222222222223 Epoch AI benchmarking hub · Feb 5, 2026 | #38 · #38 in Math Margin 84.44444444444444 Epoch AI benchmarking hub · Feb 27, 2025 |
| Science | #32 · #32 in Science Margin — Epoch AI benchmarking hub · Feb 5, 2026 | #92 · #92 in Science Margin — Epoch AI benchmarking hub · Feb 27, 2025 |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Web dev | #37 · Was SOTA · Coding › Web dev Margin 28.799999999999997 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #2 · Near-SOTA · Long context Margin 0.5319148936170421 LMArena leaderboard dataset · Oct 13, 2026 | #93 · Was SOTA · Long context Margin 49.468085106382986 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #3 · Near-SOTA · Factuality Margin 2.3255813953488342 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Abstraction (ARC) | — | #83 · #83 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Feb 27, 2025 |
Claude Opus 4.6: $10 per 1M blended tokens.
GPT-4.5 Preview: price per 1M tokens is unset in the catalog.
Claude Opus 4.6: closed weights.
GPT-4.5 Preview: closed weights.
General LLM: As of Oct 15, 2026, Claude Opus 4.6 leads GPT-4.5 Preview in General LLM at #4 against #79.
Reasoning: As of Oct 15, 2026, Claude Opus 4.6 leads GPT-4.5 Preview in Reasoning at #2 against #121.
Math: As of Oct 15, 2026, Claude Opus 4.6 leads GPT-4.5 Preview in Math at #11 against #38.
Science: As of Oct 15, 2026, Claude Opus 4.6 leads GPT-4.5 Preview in Science at #32 against #92.
Long context: As of Oct 15, 2026, Claude Opus 4.6 leads GPT-4.5 Preview in Long context at #2 against #93.
Claude Opus 4.6 · GPT-4.5 Preview
Claude Opus 4.6 or GPT-4.5 Preview?
As of Oct 15, 2026, Claude Opus 4.6 leads GPT-4.5 Preview in 5 of 5 shared categories: General LLM, Reasoning, Math, Science, and Long context.
Claude Opus 4.6 or GPT-4.5 Preview for General LLM?
As of Oct 15, 2026, Claude Opus 4.6 leads GPT-4.5 Preview in General LLM at #4 against #79.
Claude Opus 4.6 or GPT-4.5 Preview for Reasoning?
As of Oct 15, 2026, Claude Opus 4.6 leads GPT-4.5 Preview in Reasoning at #2 against #121.
Claude Opus 4.6 or GPT-4.5 Preview for Math?
As of Oct 15, 2026, Claude Opus 4.6 leads GPT-4.5 Preview in Math at #11 against #38.