Claude Opus 4.6 vs Claude Opus 5
As of Oct 15, 2026, Claude Opus 4.6 leads Claude Opus 5 in 4 of 6 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Opus 4.6
Close. Near-SOTA in Reasoning, rank #2.
Claude Opus 5
Close. Near-SOTA in Factuality, rank #4.
| Category | Claude Opus 4.6 | Claude Opus 5 |
|---|---|---|
| General LLM | #4 · Near-SOTA · General LLM Margin 2.1276595744680833 LMArena leaderboard dataset · Oct 13, 2026 | #11 · Was SOTA · General LLM Margin 5.851063829787236 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #2 · Near-SOTA · Reasoning Margin 1.5957446808510696 LMArena leaderboard dataset · Oct 13, 2026 | #9 · Was SOTA · Reasoning Margin 5.319148936170208 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #11 · #11 in Math Margin 22.22222222222223 Epoch AI benchmarking hub · Feb 5, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #32 · #32 in Science Margin — Epoch AI benchmarking hub · Feb 5, 2026 | #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 | #37 · Was SOTA · Coding › Web dev Margin 28.799999999999997 LMArena leaderboard dataset · Oct 13, 2026 | #6 · Near-SOTA · Coding › Web dev Margin 4 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #2 · Near-SOTA · Long context Margin 0.5319148936170421 LMArena leaderboard dataset · Oct 13, 2026 | #9 · Was SOTA · Long context Margin 4.7872340425531945 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | #12 · #12 in Vision Margin 36.8421052631579 Epoch AI benchmarking hub · Jul 24, 2026 |
| Factuality | #3 · Near-SOTA · Factuality Margin 2.3255813953488342 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 4.6: $10 per 1M blended tokens.
Claude Opus 5: $10 per 1M blended tokens.
Claude Opus 4.6: closed weights.
Claude Opus 5: closed weights.
General LLM: As of Oct 15, 2026, Claude Opus 4.6 leads Claude Opus 5 in General LLM at #4 against #11.
Reasoning: As of Oct 15, 2026, Claude Opus 4.6 leads Claude Opus 5 in Reasoning at #2 against #9.
Science: As of Oct 15, 2026, Claude Opus 5 leads Claude Opus 4.6 in Science at #12 against #32.
Coding › Web dev: As of Oct 15, 2026, Claude Opus 5 leads Claude Opus 4.6 in Coding › Web dev at #6 against #37.
Long context: As of Oct 15, 2026, Claude Opus 4.6 leads Claude Opus 5 in Long context at #2 against #9.
Factuality: As of Oct 15, 2026, Claude Opus 4.6 leads Claude Opus 5 in Factuality at #3 against #4.
Claude Opus 4.6 · Claude Opus 5
Claude Opus 4.6 or Claude Opus 5?
As of Oct 15, 2026, Claude Opus 4.6 leads Claude Opus 5 in 4 of 6 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Opus 4.6 or Claude Opus 5 for General LLM?
As of Oct 15, 2026, Claude Opus 4.6 leads Claude Opus 5 in General LLM at #4 against #11.
Claude Opus 4.6 or Claude Opus 5 for Reasoning?
As of Oct 15, 2026, Claude Opus 4.6 leads Claude Opus 5 in Reasoning at #2 against #9.
Claude Opus 4.6 or Claude Opus 5 for Science?
As of Oct 15, 2026, Claude Opus 5 leads Claude Opus 4.6 in Science at #12 against #32.