Claude Sonnet 5 vs GPT-5.5
As of Oct 14, 2026, Claude Sonnet 5 leads GPT-5.5 in 1 of 6 shared categories: Coding › Web dev.
Claude Sonnet 5
#19 Best current rank: #19 in Coding, as of Oct 14, 2026.
GPT-5.5
It used to be. Was SOTA in General LLM.
| Category | Claude Sonnet 5 | GPT-5.5 |
|---|---|---|
| General LLM | #39 · #39 in General LLM Margin 26.530612244897952 LMArena leaderboard dataset · Oct 13, 2026 | #21 · Was SOTA · General LLM Margin 14.285714285714292 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #34 · #34 in Reasoning Margin 23.972602739726028 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 | #32 · #32 in Science Margin — Epoch AI benchmarking hub · Jun 30, 2026 | #30 · #30 in Science Margin — Epoch AI benchmarking hub · Apr 23, 2026 |
| Coding | #19 · #19 in Coding Margin 95.45454545454545 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #19 · #19 in Coding › Agentic Margin 95.45454545454545 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #38 · #38 in Coding › Web dev Margin 34.57943925233644 LMArena leaderboard dataset · Oct 13, 2026 | #44 · #44 in Coding › Web dev Margin 40.18691588785047 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #31 · #31 in Long context Margin 21.088435374149654 LMArena leaderboard dataset · Oct 13, 2026 | #23 · Was SOTA · Long context Margin 15.646258503401356 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | #10 · Was SOTA · Vision Margin 28.94736842105263 Epoch AI benchmarking hub · Apr 23, 2026 |
| Factuality | #47 · #47 in Factuality Margin 35.82089552238806 LMArena leaderboard dataset · Oct 13, 2026 | #5 · Was SOTA · Factuality Margin 4.477611940298502 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #7 · #7 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Apr 23, 2026 |
Claude Sonnet 5: $4.000000000000001 per 1M blended tokens.
GPT-5.5: $11.25 per 1M blended tokens.
Claude Sonnet 5: closed weights.
GPT-5.5: closed weights.
General LLM: As of Oct 14, 2026, GPT-5.5 leads Claude Sonnet 5 in General LLM at #21 against #39.
Reasoning: As of Oct 14, 2026, GPT-5.5 leads Claude Sonnet 5 in Reasoning at #25 against #34.
Science: As of Oct 14, 2026, GPT-5.5 leads Claude Sonnet 5 in Science at #30 against #32.
Coding › Web dev: As of Oct 14, 2026, Claude Sonnet 5 leads GPT-5.5 in Coding › Web dev at #38 against #44.
Long context: As of Oct 14, 2026, GPT-5.5 leads Claude Sonnet 5 in Long context at #23 against #31.
Factuality: As of Oct 14, 2026, GPT-5.5 leads Claude Sonnet 5 in Factuality at #5 against #47.
Claude Sonnet 5 or GPT-5.5?
As of Oct 14, 2026, Claude Sonnet 5 leads GPT-5.5 in 1 of 6 shared categories: Coding › Web dev.
Claude Sonnet 5 or GPT-5.5 for General LLM?
As of Oct 14, 2026, GPT-5.5 leads Claude Sonnet 5 in General LLM at #21 against #39.
Claude Sonnet 5 or GPT-5.5 for Reasoning?
As of Oct 14, 2026, GPT-5.5 leads Claude Sonnet 5 in Reasoning at #25 against #34.
Claude Sonnet 5 or GPT-5.5 for Science?
As of Oct 14, 2026, GPT-5.5 leads Claude Sonnet 5 in Science at #30 against #32.