Claude 3 Opus vs Claude Sonnet 5.5
As of Oct 15, 2026, Claude 3 Opus leads Claude Sonnet 5.5 in 1 of 2 shared categories: General LLM.
Claude 3 Opus
#9 Best recorded rank: #9 in General LLM, as of Oct 15, 2026.
Claude Sonnet 5.5
Yes. SOTA in co-SOTA in Coding, co-SOTA in Coding › Agentic and co-SOTA in Vision.
| Category | Claude 3 Opus | Claude Sonnet 5.5 |
|---|---|---|
| General LLM | #9 · #9 in General LLM Margin — LMArena leaderboard dataset · Sep 27, 2024 | #27 · #27 in General LLM Margin 18.367346938775512 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 7, 2024 | #18 · #18 in Reasoning Margin 13.013698630136986 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | — | #4 · #4 in Math Margin 6.666666666666671 Epoch AI benchmarking hub · Sep 28, 2026 |
| Science | #138 · #138 in Science Margin — Epoch AI benchmarking hub · Feb 29, 2024 | #3 · #3 in Science Margin — Epoch AI benchmarking hub · Sep 28, 2026 |
| Coding | — | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | — | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Web dev | — | #3 · Near-SOTA · Coding › Web dev Margin 1.8691588785046775 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | — | #11 · #11 in Long context Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 28, 2026 |
| Factuality | #— · Not enough data Margin — Epoch AI benchmarking hub · Feb 29, 2024 | #16 · #16 in Factuality Margin 12.68656716417911 LMArena leaderboard dataset · Oct 13, 2026 |
Claude 3 Opus: price per 1M tokens is unset in the catalog.
Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.
Claude 3 Opus: closed weights.
Claude Sonnet 5.5: closed weights.
General LLM: As of Oct 15, 2026, Claude 3 Opus leads Claude Sonnet 5.5 in General LLM at #9 against #27.
Science: As of Oct 15, 2026, Claude Sonnet 5.5 leads Claude 3 Opus in Science at #3 against #138.
Claude 3 Opus · Claude Sonnet 5.5
Claude 3 Opus or Claude Sonnet 5.5?
As of Oct 15, 2026, Claude 3 Opus leads Claude Sonnet 5.5 in 1 of 2 shared categories: General LLM.
Claude 3 Opus or Claude Sonnet 5.5 for General LLM?
As of Oct 15, 2026, Claude 3 Opus leads Claude Sonnet 5.5 in General LLM at #9 against #27.
Claude 3 Opus or Claude Sonnet 5.5 for Science?
As of Oct 15, 2026, Claude Sonnet 5.5 leads Claude 3 Opus in Science at #3 against #138.