Claude Opus 5.5 vs GPT-5.6 Terra
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Terra in 9 of 10 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, 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 Terra
#4 Best recorded rank: #4 in Abstraction (ARC), as of Oct 14, 2026.
| Category | Claude Opus 5.5 | GPT-5.6 Terra |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.3605442176870781 LMArena leaderboard dataset · Oct 13, 2026 | #35 · #35 in General LLM Margin 23.80952380952381 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #35 · #35 in Reasoning Margin 24.657534246575338 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 | #15 · #15 in Science Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #13 · #13 in Coding Margin 63.63636363636363 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #13 · #13 in Coding › Agentic Margin 63.63636363636363 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Web dev | #1 · SOTA · Coding › Web dev Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #42 · #42 in Coding › Web dev Margin 38.3177570093458 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #46 · #46 in Long context Margin 31.292517006802726 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 2026 | #11 · #11 in Vision Margin 31.578947368421055 Epoch AI benchmarking hub · Jul 9, 2026 |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #24 · #24 in Factuality Margin 18.656716417910445 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #4 · #4 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.
GPT-5.6 Terra: $4.5 per 1M blended tokens.
Claude Opus 5.5: closed weights.
GPT-5.6 Terra: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Terra in General LLM at #2 against #35.
Reasoning: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Terra in Reasoning at #1 against #35.
Science: As of Oct 14, 2026, GPT-5.6 Terra leads Claude Opus 5.5 in Science at #15 against #31.
Coding: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Terra in Coding at #1 against #13.
Coding › Agentic: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Terra in Coding › Agentic at #1 against #13.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Terra in Coding › Web dev at #1 against #42.
Long context: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Terra in Long context at #1 against #46.
Vision: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Terra in Vision at #4 against #11.
Factuality: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Terra in Factuality at #1 against #24.
Abstraction (ARC): As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Terra in Abstraction (ARC) at #1 against #4.
Claude Opus 5.5 · GPT-5.6 Terra
Claude Opus 5.5 or GPT-5.6 Terra?
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Terra in 9 of 10 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, Factuality, and Abstraction (ARC).
Claude Opus 5.5 or GPT-5.6 Terra for General LLM?
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Terra in General LLM at #2 against #35.
Claude Opus 5.5 or GPT-5.6 Terra for Reasoning?
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-5.6 Terra in Reasoning at #1 against #35.
Claude Opus 5.5 or GPT-5.6 Terra for Science?
As of Oct 14, 2026, GPT-5.6 Terra leads Claude Opus 5.5 in Science at #15 against #31.