Claude Opus 5 vs GPT-5.6 Terra
As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Terra in 9 of 10 shared categories: General LLM, Reasoning, Science, Coding, Coding › Agentic, Coding › Web dev, Long context, Factuality, and Abstraction (ARC).
Claude Opus 5
Close. Near-SOTA in Factuality, rank #4.
GPT-5.6 Terra
#4 Best recorded rank: #4 in Abstraction (ARC), as of Oct 14, 2026.
| Category | Claude Opus 5 | GPT-5.6 Terra |
|---|---|---|
| General LLM | #11 · Was SOTA · General LLM Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #35 · #35 in General LLM Margin 23.80952380952381 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #9 · Was SOTA · Reasoning Margin 6.849315068493155 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 | #12 · #12 in Science Margin — Epoch AI benchmarking hub · Jul 24, 2026 | #15 · #15 in Science Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
| Coding | #4 · #4 in Coding Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | #13 · #13 in Coding Margin 63.63636363636363 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #4 · #4 in Coding › Agentic Margin 22.727272727272734 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 | #6 · Was SOTA · Coding › Web dev Margin 4.672897196261687 LMArena leaderboard dataset · Oct 13, 2026 | #42 · #42 in Coding › Web dev Margin 38.3177570093458 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #9 · Was SOTA · Long context Margin 6.122448979591837 LMArena leaderboard dataset · Oct 13, 2026 | #46 · #46 in Long context Margin 31.292517006802726 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #12 · #12 in Vision Margin 36.8421052631579 Epoch AI benchmarking hub · Jul 24, 2026 | #11 · #11 in Vision Margin 31.578947368421055 Epoch AI benchmarking hub · Jul 9, 2026 |
| Factuality | #4 · Near-SOTA · Factuality Margin 3.731343283582092 LMArena leaderboard dataset · Oct 13, 2026 | #24 · #24 in Factuality Margin 18.656716417910445 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 24, 2026 | #4 · #4 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
Claude Opus 5: $10 per 1M blended tokens.
GPT-5.6 Terra: $4.5 per 1M blended tokens.
Claude Opus 5: closed weights.
GPT-5.6 Terra: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Terra in General LLM at #11 against #35.
Reasoning: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Terra in Reasoning at #9 against #35.
Science: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Terra in Science at #12 against #15.
Coding: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Terra in Coding at #4 against #13.
Coding › Agentic: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Terra in Coding › Agentic at #4 against #13.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Terra in Coding › Web dev at #6 against #42.
Long context: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Terra in Long context at #9 against #46.
Vision: As of Oct 14, 2026, GPT-5.6 Terra leads Claude Opus 5 in Vision at #11 against #12.
Factuality: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Terra in Factuality at #4 against #24.
Abstraction (ARC): As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Terra in Abstraction (ARC) at #3 against #4.
Claude Opus 5 or GPT-5.6 Terra?
As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Terra in 9 of 10 shared categories: General LLM, Reasoning, Science, Coding, Coding › Agentic, Coding › Web dev, Long context, Factuality, and Abstraction (ARC).
Claude Opus 5 or GPT-5.6 Terra for General LLM?
As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Terra in General LLM at #11 against #35.
Claude Opus 5 or GPT-5.6 Terra for Reasoning?
As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Terra in Reasoning at #9 against #35.
Claude Opus 5 or GPT-5.6 Terra for Science?
As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Terra in Science at #12 against #15.