Claude 3 Opus vs GPT-5.5 Instant
As of Oct 15, 2026, Claude 3 Opus leads GPT-5.5 Instant in 1 of 2 shared categories: General LLM.
Claude 3 Opus
#11 Best recorded rank: #11 in General LLM, as of Oct 15, 2026.
GPT-5.5 Instant
#36 Best current rank: #36 in General LLM, as of Oct 15, 2026.
| Category | Claude 3 Opus | GPT-5.5 Instant |
|---|---|---|
| General LLM | #11 · #11 in General LLM Margin — LMArena leaderboard dataset · Sep 27, 2024 | #36 · #36 in General LLM Margin 19.148936170212764 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 7, 2024 | #38 · #38 in Reasoning Margin 20.744680851063833 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | — | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #138 · #138 in Science Margin — Epoch AI benchmarking hub · Feb 29, 2024 | #65 · #65 in Science Margin — Epoch AI benchmarking hub · May 5, 2026 |
| Coding | — | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | — | #46 · #46 in Long context Margin 24.468085106382972 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 | #— · Not enough data Margin — Epoch AI benchmarking hub · Feb 29, 2024 | #78 · #78 in Factuality Margin 45.93023255813954 LMArena leaderboard dataset · Oct 13, 2026 |
Claude 3 Opus: price per 1M tokens is unset in the catalog.
GPT-5.5 Instant: price per 1M tokens is unset in the catalog.
Claude 3 Opus: closed weights.
GPT-5.5 Instant: closed weights.
General LLM: As of Oct 15, 2026, Claude 3 Opus leads GPT-5.5 Instant in General LLM at #11 against #36.
Science: As of Oct 15, 2026, GPT-5.5 Instant leads Claude 3 Opus in Science at #65 against #138.
Claude 3 Opus · GPT-5.5 Instant
Claude 3 Opus or GPT-5.5 Instant?
As of Oct 15, 2026, Claude 3 Opus leads GPT-5.5 Instant in 1 of 2 shared categories: General LLM.
Claude 3 Opus or GPT-5.5 Instant for General LLM?
As of Oct 15, 2026, Claude 3 Opus leads GPT-5.5 Instant in General LLM at #11 against #36.
Claude 3 Opus or GPT-5.5 Instant for Science?
As of Oct 15, 2026, GPT-5.5 Instant leads Claude 3 Opus in Science at #65 against #138.