Claude Sonnet 5.5 vs GPT-5.6 Sol
As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Sol in 6 of 9 shared categories: Science, Coding, Coding › Agentic, Coding › Web dev, Long context, and Vision.
Claude Sonnet 5.5
Yes. SOTA in co-SOTA in Coding, co-SOTA in Coding › Agentic and co-SOTA in Vision.
GPT-5.6 Sol
Close. Near-SOTA in Vision, rank #3.
| Category | Claude Sonnet 5.5 | GPT-5.6 Sol |
|---|---|---|
| General LLM | #27 · #27 in General LLM Margin 18.367346938775512 LMArena leaderboard dataset · Oct 13, 2026 | #17 · #17 in General LLM Margin 11.564625850340136 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #18 · #18 in Reasoning Margin 13.013698630136986 LMArena leaderboard dataset · Oct 13, 2026 | #12 · #12 in Reasoning Margin 8.904109589041099 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #4 · #4 in Math Margin 6.666666666666671 Epoch AI benchmarking hub · Sep 28, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #3 · #3 in Science Margin — Epoch AI benchmarking hub · Sep 28, 2026 | #13 · #13 in Science Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #9 · #9 in Coding Margin 45.45454545454545 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #9 · #9 in Coding › Agentic Margin 45.45454545454545 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Web dev | #3 · Near-SOTA · Coding › Web dev Margin 1.8691588785046775 LMArena leaderboard dataset · Oct 13, 2026 | #21 · Was SOTA · Coding › Web dev Margin 18.691588785046733 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #11 · #11 in Long context Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #13 · #13 in Long context Margin 8.84353741496598 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 28, 2026 | #3 · Near-SOTA · Vision Margin 10.526315789473685 Epoch AI benchmarking hub · Jul 9, 2026 |
| Factuality | #16 · #16 in Factuality Margin 12.68656716417911 LMArena leaderboard dataset · Oct 13, 2026 | #14 · #14 in Factuality Margin 11.194029850746276 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.
GPT-5.6 Sol: $4.000000000000001 per 1M blended tokens.
Claude Sonnet 5.5: closed weights.
GPT-5.6 Sol: closed weights.
General LLM: As of Oct 14, 2026, GPT-5.6 Sol leads Claude Sonnet 5.5 in General LLM at #17 against #27.
Reasoning: As of Oct 14, 2026, GPT-5.6 Sol leads Claude Sonnet 5.5 in Reasoning at #12 against #18.
Science: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Sol in Science at #3 against #13.
Coding: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Sol in Coding at #1 against #9.
Coding › Agentic: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Sol in Coding › Agentic at #1 against #9.
Coding › Web dev: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Sol in Coding › Web dev at #3 against #21.
Long context: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Sol in Long context at #11 against #13.
Vision: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Sol in Vision at #1 against #3.
Factuality: As of Oct 14, 2026, GPT-5.6 Sol leads Claude Sonnet 5.5 in Factuality at #14 against #16.
Claude Sonnet 5.5 · GPT-5.6 Sol
Claude Sonnet 5.5 or GPT-5.6 Sol?
As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Sol in 6 of 9 shared categories: Science, Coding, Coding › Agentic, Coding › Web dev, Long context, and Vision.
Claude Sonnet 5.5 or GPT-5.6 Sol for General LLM?
As of Oct 14, 2026, GPT-5.6 Sol leads Claude Sonnet 5.5 in General LLM at #17 against #27.
Claude Sonnet 5.5 or GPT-5.6 Sol for Reasoning?
As of Oct 14, 2026, GPT-5.6 Sol leads Claude Sonnet 5.5 in Reasoning at #12 against #18.
Claude Sonnet 5.5 or GPT-5.6 Sol for Science?
As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Sol in Science at #3 against #13.