Claude Sonnet 4.6 vs Claude Sonnet 5.5
As of Oct 14, 2026, Claude Sonnet 4.6 leads Claude Sonnet 5.5 in 0 of 7 shared categories.
Claude Sonnet 4.6
It used to be. Was SOTA in Long context.
Claude Sonnet 5.5
Yes. SOTA in co-SOTA in Coding, co-SOTA in Coding › Agentic and co-SOTA in Vision.
| Category | Claude Sonnet 4.6 | Claude Sonnet 5.5 |
|---|---|---|
| General LLM | #32 · #32 in General LLM Margin 21.768707482993193 LMArena leaderboard dataset · Oct 13, 2026 | #27 · #27 in General LLM Margin 18.367346938775512 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #20 · #20 in Reasoning Margin 14.38356164383562 LMArena leaderboard dataset · Oct 13, 2026 | #18 · #18 in Reasoning Margin 13.013698630136986 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #4 · #4 in Math Margin 6.666666666666671 Epoch AI benchmarking hub · Sep 28, 2026 |
| Science | #50 · #50 in Science Margin — Epoch AI benchmarking hub · Feb 17, 2026 | #3 · #3 in Science Margin — Epoch AI benchmarking hub · Sep 28, 2026 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Feb 17, 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 | #41 · #41 in Coding › Web dev Margin 37.38317757009346 LMArena leaderboard dataset · Oct 13, 2026 | #3 · Near-SOTA · Coding › Web dev Margin 1.8691588785046775 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #20 · Was SOTA · Long context Margin 13.605442176870753 LMArena leaderboard dataset · Oct 13, 2026 | #11 · #11 in Long context Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #23 · Was SOTA · Vision Margin 63.1578947368421 Epoch AI benchmarking hub · Feb 17, 2026 | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 28, 2026 |
| Factuality | #34 · #34 in Factuality Margin 26.11940298507463 LMArena leaderboard dataset · Oct 13, 2026 | #16 · #16 in Factuality Margin 12.68656716417911 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #23 · #23 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Feb 17, 2026 | — |
Claude Sonnet 4.6: $6 per 1M blended tokens.
Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.
Claude Sonnet 4.6: closed weights.
Claude Sonnet 5.5: closed weights.
General LLM: As of Oct 14, 2026, Claude Sonnet 5.5 leads Claude Sonnet 4.6 in General LLM at #27 against #32.
Reasoning: As of Oct 14, 2026, Claude Sonnet 5.5 leads Claude Sonnet 4.6 in Reasoning at #18 against #20.
Science: As of Oct 14, 2026, Claude Sonnet 5.5 leads Claude Sonnet 4.6 in Science at #3 against #50.
Coding › Web dev: As of Oct 14, 2026, Claude Sonnet 5.5 leads Claude Sonnet 4.6 in Coding › Web dev at #3 against #41.
Long context: As of Oct 14, 2026, Claude Sonnet 5.5 leads Claude Sonnet 4.6 in Long context at #11 against #20.
Vision: As of Oct 14, 2026, Claude Sonnet 5.5 leads Claude Sonnet 4.6 in Vision at #1 against #23.
Factuality: As of Oct 14, 2026, Claude Sonnet 5.5 leads Claude Sonnet 4.6 in Factuality at #16 against #34.
Claude Sonnet 4.6 · Claude Sonnet 5.5
Claude Sonnet 4.6 or Claude Sonnet 5.5?
As of Oct 14, 2026, Claude Sonnet 4.6 leads Claude Sonnet 5.5 in 0 of 7 shared categories.
Claude Sonnet 4.6 or Claude Sonnet 5.5 for General LLM?
As of Oct 14, 2026, Claude Sonnet 5.5 leads Claude Sonnet 4.6 in General LLM at #27 against #32.
Claude Sonnet 4.6 or Claude Sonnet 5.5 for Reasoning?
As of Oct 14, 2026, Claude Sonnet 5.5 leads Claude Sonnet 4.6 in Reasoning at #18 against #20.
Claude Sonnet 4.6 or Claude Sonnet 5.5 for Science?
As of Oct 14, 2026, Claude Sonnet 5.5 leads Claude Sonnet 4.6 in Science at #3 against #50.