Claude Sonnet 5.5 vs GPT-4O
As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-4O in 2 of 2 shared categories: Math and Science.
Claude Sonnet 5.5
Yes. SOTA in Coding (tied), Coding › Agentic (tied), and Vision (tied).
GPT-4O
It used to be. Was SOTA in General LLM.
| Category | Claude Sonnet 5.5 | GPT-4O |
|---|---|---|
| General LLM | #29 · #29 in General LLM Margin 15.425531914893611 LMArena leaderboard dataset · Oct 13, 2026 | #— · Was SOTA · General LLM Margin — LMArena leaderboard dataset · Feb 21, 2025 |
| Reasoning | #18 · #18 in Reasoning Margin 10.106382978723403 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Feb 6, 2025 |
| Math | #4 · #4 in Math Margin 6.666666666666671 Epoch AI benchmarking hub · Sep 28, 2026 | #45 · #45 in Math Margin 100 Epoch AI benchmarking hub · Nov 20, 2024 |
| Science | #3 · #3 in Science Margin — Epoch AI benchmarking hub · Sep 28, 2026 | #131 · #131 in Science Margin — Epoch AI benchmarking hub · Nov 20, 2024 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Feb 17, 2025 |
| Coding › Agentic | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #3 · Near-SOTA · Coding › Web dev Margin 1.5999999999999943 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #11 · #11 in Long context Margin 5.851063829787236 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Jan 22, 2025 |
| Vision | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 28, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #17 · #17 in Factuality Margin 10.465116279069761 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Aug 6, 2024 |
| Abstraction (ARC) | — | #87 · #87 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Nov 20, 2024 |
Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.
GPT-4O: $4.375000000000001 per 1M blended tokens.
Claude Sonnet 5.5: closed weights.
GPT-4O: closed weights.
Math: As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-4O in Math at #4 against #45.
Science: As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-4O in Science at #3 against #131.
Claude Sonnet 5.5 or GPT-4O?
As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-4O in 2 of 2 shared categories: Math and Science.
Claude Sonnet 5.5 or GPT-4O for Math?
As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-4O in Math at #4 against #45.
Claude Sonnet 5.5 or GPT-4O for Science?
As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-4O in Science at #3 against #131.