Claude Opus 5.5 vs GPT-5.6 Sol
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Sol in 8 of 10 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, Factuality, and Abstraction (ARC).
Claude Opus 5.5
Yes. SOTA in co-SOTA in Reasoning, co-SOTA in Coding, co-SOTA in Coding › Agentic, Coding › Web dev, co-SOTA in Long context and co-SOTA in Factuality.
GPT-5.6 Sol
Close. Near-SOTA in Vision, rank #3.
| Category | Claude Opus 5.5 | GPT-5.6 Sol |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.3605442176870781 LMArena leaderboard dataset · Oct 13, 2026 | #17 · #17 in General LLM Margin 11.564625850340136 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #12 · #12 in Reasoning Margin 8.904109589041099 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 | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 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 | #1 · SOTA · Coding › Web dev Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #21 · Was SOTA · Coding › Web dev Margin 18.691588785046733 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #13 · #13 in Long context Margin 8.84353741496598 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 2026 | #3 · Near-SOTA · Vision Margin 10.526315789473685 Epoch AI benchmarking hub · Jul 9, 2026 |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #14 · #14 in Factuality Margin 11.194029850746276 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.
GPT-5.6 Sol: $4.000000000000001 per 1M blended tokens.
Claude Opus 5.5: closed weights.
GPT-5.6 Sol: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Sol in General LLM at #2 against #17.
Reasoning: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Sol in Reasoning at #1 against #12.
Science: As of Oct 14, 2026, GPT-5.6 Sol leads Claude Opus 5.5 in Science at #13 against #31.
Coding: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Sol in Coding at #1 against #9.
Coding › Agentic: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Sol in Coding › Agentic at #1 against #9.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Sol in Coding › Web dev at #1 against #21.
Long context: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Sol in Long context at #1 against #13.
Vision: As of Oct 14, 2026, GPT-5.6 Sol leads Claude Opus 5.5 in Vision at #3 against #4.
Factuality: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Sol in Factuality at #1 against #14.
Abstraction (ARC): As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Sol in Abstraction (ARC) at #1 against #3.
Claude Opus 5.5 or GPT-5.6 Sol?
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Sol in 8 of 10 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, Factuality, and Abstraction (ARC).
Claude Opus 5.5 or GPT-5.6 Sol for General LLM?
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Sol in General LLM at #2 against #17.
Claude Opus 5.5 or GPT-5.6 Sol for Reasoning?
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Sol in Reasoning at #1 against #12.
Claude Opus 5.5 or GPT-5.6 Sol for Science?
As of Oct 14, 2026, GPT-5.6 Sol leads Claude Opus 5.5 in Science at #13 against #31.