Claude 3.7 Sonnet vs Claude Opus 5.5
As of Oct 15, 2026, Claude 3.7 Sonnet leads Claude Opus 5.5 in 0 of 5 shared categories.
Claude 3.7 Sonnet
It used to be. Was SOTA in Long context.
Claude Opus 5.5
Yes. SOTA in Reasoning (tied), Coding (tied), Coding › Agentic (tied), Coding › Web dev, Long context (tied), and Factuality (tied).
| Category | Claude 3.7 Sonnet | Claude Opus 5.5 |
|---|---|---|
| General LLM | #184 · #184 in General LLM Margin 97.87234042553192 LMArena leaderboard dataset · Oct 13, 2026 | #2 · Near-SOTA · General LLM Margin 1.0638297872340416 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #174 · #174 in Reasoning Margin 93.08510638297872 LMArena leaderboard dataset · Oct 13, 2026 | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #33 · #33 in Math Margin 73.33333333333334 Epoch AI benchmarking hub · Feb 24, 2025 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #98 · #98 in Science Margin — Epoch AI benchmarking hub · Feb 24, 2025 | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #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 | — | #1 · SOTA · Coding › Web dev Margin 0 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #144 · Was SOTA · Long context Margin 76.59574468085106 LMArena leaderboard dataset · Oct 13, 2026 | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 2026 |
| Factuality | — | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #80 · #80 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Feb 24, 2025 | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 |
Claude 3.7 Sonnet: price per 1M tokens is unset in the catalog.
Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.
Claude 3.7 Sonnet: closed weights.
Claude Opus 5.5: closed weights.
General LLM: As of Oct 15, 2026, Claude Opus 5.5 leads Claude 3.7 Sonnet in General LLM at #2 against #184.
Reasoning: As of Oct 15, 2026, Claude Opus 5.5 leads Claude 3.7 Sonnet in Reasoning at #1 against #174.
Science: As of Oct 15, 2026, Claude Opus 5.5 leads Claude 3.7 Sonnet in Science at #31 against #98.
Long context: As of Oct 15, 2026, Claude Opus 5.5 leads Claude 3.7 Sonnet in Long context at #1 against #144.
Abstraction (ARC): As of Oct 15, 2026, Claude Opus 5.5 leads Claude 3.7 Sonnet in Abstraction (ARC) at #1 against #80.
Claude 3.7 Sonnet · Claude Opus 5.5
Claude 3.7 Sonnet or Claude Opus 5.5?
As of Oct 15, 2026, Claude 3.7 Sonnet leads Claude Opus 5.5 in 0 of 5 shared categories.
Claude 3.7 Sonnet or Claude Opus 5.5 for General LLM?
As of Oct 15, 2026, Claude Opus 5.5 leads Claude 3.7 Sonnet in General LLM at #2 against #184.
Claude 3.7 Sonnet or Claude Opus 5.5 for Reasoning?
As of Oct 15, 2026, Claude Opus 5.5 leads Claude 3.7 Sonnet in Reasoning at #1 against #174.
Claude 3.7 Sonnet or Claude Opus 5.5 for Science?
As of Oct 15, 2026, Claude Opus 5.5 leads Claude 3.7 Sonnet in Science at #31 against #98.