Claude Sonnet 4.6 vs GPT-5.5
As of Oct 14, 2026, Claude Sonnet 4.6 leads GPT-5.5 in 3 of 8 shared categories: Reasoning, Coding › Web dev, and Long context.
Claude Sonnet 4.6
It used to be. Was SOTA in Long context.
GPT-5.5
It used to be. Was SOTA in General LLM.
| Category | Claude Sonnet 4.6 | GPT-5.5 |
|---|---|---|
| General LLM | #32 · #32 in General LLM Margin 21.768707482993193 LMArena leaderboard dataset · Oct 13, 2026 | #21 · Was SOTA · General LLM Margin 14.285714285714292 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #20 · #20 in Reasoning Margin 14.38356164383562 LMArena leaderboard dataset · Oct 13, 2026 | #25 · #25 in Reasoning Margin 17.808219178082197 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #50 · #50 in Science Margin — Epoch AI benchmarking hub · Feb 17, 2026 | #30 · #30 in Science Margin — Epoch AI benchmarking hub · Apr 23, 2026 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Feb 17, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Web dev | #41 · #41 in Coding › Web dev Margin 37.38317757009346 LMArena leaderboard dataset · Oct 13, 2026 | #44 · #44 in Coding › Web dev Margin 40.18691588785047 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #20 · Was SOTA · Long context Margin 13.605442176870753 LMArena leaderboard dataset · Oct 13, 2026 | #23 · Was SOTA · Long context Margin 15.646258503401356 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #23 · Was SOTA · Vision Margin 63.1578947368421 Epoch AI benchmarking hub · Feb 17, 2026 | #10 · Was SOTA · Vision Margin 28.94736842105263 Epoch AI benchmarking hub · Apr 23, 2026 |
| Factuality | #34 · #34 in Factuality Margin 26.11940298507463 LMArena leaderboard dataset · Oct 13, 2026 | #5 · Was SOTA · Factuality Margin 4.477611940298502 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #23 · #23 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Feb 17, 2026 | #7 · #7 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Apr 23, 2026 |
Claude Sonnet 4.6: $6 per 1M blended tokens.
GPT-5.5: $11.25 per 1M blended tokens.
Claude Sonnet 4.6: closed weights.
GPT-5.5: closed weights.
General LLM: As of Oct 14, 2026, GPT-5.5 leads Claude Sonnet 4.6 in General LLM at #21 against #32.
Reasoning: As of Oct 14, 2026, Claude Sonnet 4.6 leads GPT-5.5 in Reasoning at #20 against #25.
Science: As of Oct 14, 2026, GPT-5.5 leads Claude Sonnet 4.6 in Science at #30 against #50.
Coding › Web dev: As of Oct 14, 2026, Claude Sonnet 4.6 leads GPT-5.5 in Coding › Web dev at #41 against #44.
Long context: As of Oct 14, 2026, Claude Sonnet 4.6 leads GPT-5.5 in Long context at #20 against #23.
Vision: As of Oct 14, 2026, GPT-5.5 leads Claude Sonnet 4.6 in Vision at #10 against #23.
Factuality: As of Oct 14, 2026, GPT-5.5 leads Claude Sonnet 4.6 in Factuality at #5 against #34.
Abstraction (ARC): As of Oct 14, 2026, GPT-5.5 leads Claude Sonnet 4.6 in Abstraction (ARC) at #7 against #23.
Claude Sonnet 4.6 or GPT-5.5?
As of Oct 14, 2026, Claude Sonnet 4.6 leads GPT-5.5 in 3 of 8 shared categories: Reasoning, Coding › Web dev, and Long context.
Claude Sonnet 4.6 or GPT-5.5 for General LLM?
As of Oct 14, 2026, GPT-5.5 leads Claude Sonnet 4.6 in General LLM at #21 against #32.
Claude Sonnet 4.6 or GPT-5.5 for Reasoning?
As of Oct 14, 2026, Claude Sonnet 4.6 leads GPT-5.5 in Reasoning at #20 against #25.
Claude Sonnet 4.6 or GPT-5.5 for Science?
As of Oct 14, 2026, GPT-5.5 leads Claude Sonnet 4.6 in Science at #30 against #50.