Claude Opus 4.5 vs Claude Opus 4.6
As of Oct 14, 2026, Claude Opus 4.5 leads Claude Opus 4.6 in 0 of 7 shared categories.
Claude Opus 4.5
It used to be. Was SOTA in Reasoning.
Claude Opus 4.6
Close. Near-SOTA in Reasoning, rank #2.
| Category | Claude Opus 4.5 | Claude Opus 4.6 |
|---|---|---|
| General LLM | #33 · #33 in General LLM Margin 22.448979591836732 LMArena leaderboard dataset · Oct 13, 2026 | #4 · Near-SOTA · General LLM Margin 2.7210884353741562 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #28 · Was SOTA · Reasoning Margin 19.86301369863014 LMArena leaderboard dataset · Oct 13, 2026 | #2 · Near-SOTA · Reasoning Margin 2.0547945205479436 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #16 · #16 in Math Margin 33.33333333333333 Epoch AI benchmarking hub · Nov 24, 2025 | #11 · #11 in Math Margin 22.22222222222223 Epoch AI benchmarking hub · Feb 5, 2026 |
| Science | #68 · #68 in Science Margin — Epoch AI benchmarking hub · Nov 24, 2025 | #32 · #32 in Science Margin — Epoch AI benchmarking hub · Feb 5, 2026 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Nov 24, 2025 | #— · Not enough data Margin — Epoch AI benchmarking hub · Feb 5, 2026 |
| Coding › Web dev | #53 · Was SOTA · Coding › Web dev Margin 48.598130841121495 LMArena leaderboard dataset · Oct 13, 2026 | #35 · Was SOTA · Coding › Web dev Margin 31.775700934579433 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #19 · Was SOTA · Long context Margin 12.925170068027214 LMArena leaderboard dataset · Oct 13, 2026 | #2 · Near-SOTA · Long context Margin 0.6802721088435391 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | — | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #36 · #36 in Factuality Margin 27.611940298507463 LMArena leaderboard dataset · Oct 13, 2026 | #3 · Near-SOTA · Factuality Margin 2.9850746268656536 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #49 · #49 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Nov 24, 2025 | — |
Claude Opus 4.5: $10 per 1M blended tokens.
Claude Opus 4.6: $10 per 1M blended tokens.
Claude Opus 4.5: closed weights.
Claude Opus 4.6: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.6 leads Claude Opus 4.5 in General LLM at #4 against #33.
Reasoning: As of Oct 14, 2026, Claude Opus 4.6 leads Claude Opus 4.5 in Reasoning at #2 against #28.
Math: As of Oct 14, 2026, Claude Opus 4.6 leads Claude Opus 4.5 in Math at #11 against #16.
Science: As of Oct 14, 2026, Claude Opus 4.6 leads Claude Opus 4.5 in Science at #32 against #68.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 4.6 leads Claude Opus 4.5 in Coding › Web dev at #35 against #53.
Long context: As of Oct 14, 2026, Claude Opus 4.6 leads Claude Opus 4.5 in Long context at #2 against #19.
Factuality: As of Oct 14, 2026, Claude Opus 4.6 leads Claude Opus 4.5 in Factuality at #3 against #36.
Claude Opus 4.5 · Claude Opus 4.6
Claude Opus 4.5 or Claude Opus 4.6?
As of Oct 14, 2026, Claude Opus 4.5 leads Claude Opus 4.6 in 0 of 7 shared categories.
Claude Opus 4.5 or Claude Opus 4.6 for General LLM?
As of Oct 14, 2026, Claude Opus 4.6 leads Claude Opus 4.5 in General LLM at #4 against #33.
Claude Opus 4.5 or Claude Opus 4.6 for Reasoning?
As of Oct 14, 2026, Claude Opus 4.6 leads Claude Opus 4.5 in Reasoning at #2 against #28.
Claude Opus 4.5 or Claude Opus 4.6 for Math?
As of Oct 14, 2026, Claude Opus 4.6 leads Claude Opus 4.5 in Math at #11 against #16.