Claude Opus 4.1 vs Claude Opus 5
As of Oct 15, 2026, Claude Opus 4.1 leads Claude Opus 5 in 0 of 6 shared categories.
Claude Opus 4.1
It used to be. Was SOTA in General LLM.
Claude Opus 5
Close. Near-SOTA in Factuality, rank #4.
| Category | Claude Opus 4.1 | Claude Opus 5 |
|---|---|---|
| General LLM | #73 · Was SOTA · General LLM Margin 38.829787234042556 LMArena leaderboard dataset · Oct 13, 2026 | #11 · Was SOTA · General LLM Margin 5.851063829787236 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #60 · Was SOTA · Reasoning Margin 32.44680851063829 LMArena leaderboard dataset · Oct 13, 2026 | #9 · Was SOTA · Reasoning Margin 5.319148936170208 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 | #12 · #12 in Science Margin — Epoch AI benchmarking hub · Jul 24, 2026 |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #4 · #4 in Coding Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | — | #4 · #4 in Coding › Agentic Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Web dev | #84 · Was SOTA · Coding › Web dev Margin 66.4 LMArena leaderboard dataset · Oct 13, 2026 | #6 · Near-SOTA · Coding › Web dev Margin 4 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #52 · Was SOTA · Long context Margin 27.65957446808511 LMArena leaderboard dataset · Oct 13, 2026 | #9 · Was SOTA · Long context Margin 4.7872340425531945 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | — | #12 · #12 in Vision Margin 36.8421052631579 Epoch AI benchmarking hub · Jul 24, 2026 |
| Factuality | #93 · #93 in Factuality Margin 54.651162790697676 LMArena leaderboard dataset · Oct 13, 2026 | #4 · Near-SOTA · Factuality Margin 2.9069767441860535 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 24, 2026 |
Claude Opus 4.1: $29.999999999999996 per 1M blended tokens.
Claude Opus 5: $10 per 1M blended tokens.
Claude Opus 4.1: closed weights.
Claude Opus 5: closed weights.
General LLM: As of Oct 15, 2026, Claude Opus 5 leads Claude Opus 4.1 in General LLM at #11 against #73.
Reasoning: As of Oct 15, 2026, Claude Opus 5 leads Claude Opus 4.1 in Reasoning at #9 against #60.
Science: As of Oct 15, 2026, Claude Opus 5 leads Claude Opus 4.1 in Science at #12 against #83.
Coding › Web dev: As of Oct 15, 2026, Claude Opus 5 leads Claude Opus 4.1 in Coding › Web dev at #6 against #84.
Long context: As of Oct 15, 2026, Claude Opus 5 leads Claude Opus 4.1 in Long context at #9 against #52.
Factuality: As of Oct 15, 2026, Claude Opus 5 leads Claude Opus 4.1 in Factuality at #4 against #93.
Claude Opus 4.1 · Claude Opus 5
Claude Opus 4.1 or Claude Opus 5?
As of Oct 15, 2026, Claude Opus 4.1 leads Claude Opus 5 in 0 of 6 shared categories.
Claude Opus 4.1 or Claude Opus 5 for General LLM?
As of Oct 15, 2026, Claude Opus 5 leads Claude Opus 4.1 in General LLM at #11 against #73.
Claude Opus 4.1 or Claude Opus 5 for Reasoning?
As of Oct 15, 2026, Claude Opus 5 leads Claude Opus 4.1 in Reasoning at #9 against #60.
Claude Opus 4.1 or Claude Opus 5 for Science?
As of Oct 15, 2026, Claude Opus 5 leads Claude Opus 4.1 in Science at #12 against #83.