Claude Opus 4.1 vs Claude Opus 5.5
As of Oct 14, 2026, Claude Opus 4.1 leads Claude Opus 5.5 in 0 of 6 shared categories.
Claude Opus 4.1
It used to be. Was SOTA in General LLM.
Claude Opus 5.5
Yes. SOTA in co-SOTA in Reasoning, co-SOTA in Coding, co-SOTA in Coding › Agentic, Coding › Web dev, co-SOTA in Long context and co-SOTA in Factuality.
| Category | Claude Opus 4.1 | Claude Opus 5.5 |
|---|---|---|
| General LLM | #57 · Was SOTA · General LLM Margin 38.775510204081634 LMArena leaderboard dataset · Oct 13, 2026 | #2 · Near-SOTA · General LLM Margin 1.3605442176870781 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #47 · Was SOTA · Reasoning Margin 32.87671232876713 LMArena leaderboard dataset · Oct 13, 2026 | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #27 · #27 in Math Margin 57.77777777777778 Epoch AI benchmarking hub · Aug 5, 2025 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #83 · #83 in Science Margin — Epoch AI benchmarking hub · Aug 5, 2025 | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Aug 5, 2025 | #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 | #76 · Was SOTA · Coding › Web dev Margin 70.09345794392523 LMArena leaderboard dataset · Oct 13, 2026 | #1 · SOTA · Coding › Web dev Margin 0 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #44 · Was SOTA · Long context Margin 29.931972789115648 LMArena leaderboard dataset · Oct 13, 2026 | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | — | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 2026 |
| Factuality | #74 · #74 in Factuality Margin 55.97014925373134 LMArena leaderboard dataset · Oct 13, 2026 | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 |
Claude Opus 4.1: $29.999999999999996 per 1M blended tokens.
Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.
Claude Opus 4.1: closed weights.
Claude Opus 5.5: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Opus 4.1 in General LLM at #2 against #57.
Reasoning: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Opus 4.1 in Reasoning at #1 against #47.
Science: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Opus 4.1 in Science at #31 against #83.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Opus 4.1 in Coding › Web dev at #1 against #76.
Long context: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Opus 4.1 in Long context at #1 against #44.
Factuality: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Opus 4.1 in Factuality at #1 against #74.
Claude Opus 4.1 · Claude Opus 5.5
Claude Opus 4.1 or Claude Opus 5.5?
As of Oct 14, 2026, Claude Opus 4.1 leads Claude Opus 5.5 in 0 of 6 shared categories.
Claude Opus 4.1 or Claude Opus 5.5 for General LLM?
As of Oct 14, 2026, Claude Opus 5.5 leads Claude Opus 4.1 in General LLM at #2 against #57.
Claude Opus 4.1 or Claude Opus 5.5 for Reasoning?
As of Oct 14, 2026, Claude Opus 5.5 leads Claude Opus 4.1 in Reasoning at #1 against #47.
Claude Opus 4.1 or Claude Opus 5.5 for Science?
As of Oct 14, 2026, Claude Opus 5.5 leads Claude Opus 4.1 in Science at #31 against #83.