Claude Opus 4.6 vs GPT-5.6 Terra
As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Terra in 5 of 6 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 4.6
Close. Near-SOTA in Reasoning, rank #2.
GPT-5.6 Terra
#4 Best recorded rank: #4 in Abstraction (ARC), as of Oct 14, 2026.
| Category | Claude Opus 4.6 | GPT-5.6 Terra |
|---|---|---|
| General LLM | #4 · Near-SOTA · General LLM Margin 2.7210884353741562 LMArena leaderboard dataset · Oct 13, 2026 | #35 · #35 in General LLM Margin 23.80952380952381 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #2 · Near-SOTA · Reasoning Margin 2.0547945205479436 LMArena leaderboard dataset · Oct 13, 2026 | #35 · #35 in Reasoning Margin 24.657534246575338 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #11 · #11 in Math Margin 22.22222222222223 Epoch AI benchmarking hub · Feb 5, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #32 · #32 in Science Margin — Epoch AI benchmarking hub · Feb 5, 2026 | #15 · #15 in Science Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Feb 5, 2026 | #13 · #13 in Coding Margin 63.63636363636363 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | — | #13 · #13 in Coding › Agentic Margin 63.63636363636363 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Web dev | #35 · Was SOTA · Coding › Web dev Margin 31.775700934579433 LMArena leaderboard dataset · Oct 13, 2026 | #42 · #42 in Coding › Web dev Margin 38.3177570093458 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #2 · Near-SOTA · Long context Margin 0.6802721088435391 LMArena leaderboard dataset · Oct 13, 2026 | #46 · #46 in Long context Margin 31.292517006802726 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | #11 · #11 in Vision Margin 31.578947368421055 Epoch AI benchmarking hub · Jul 9, 2026 |
| Factuality | #3 · Near-SOTA · Factuality Margin 2.9850746268656536 LMArena leaderboard dataset · Oct 13, 2026 | #24 · #24 in Factuality Margin 18.656716417910445 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #4 · #4 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
Claude Opus 4.6: $10 per 1M blended tokens.
GPT-5.6 Terra: $4.5 per 1M blended tokens.
Claude Opus 4.6: closed weights.
GPT-5.6 Terra: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Terra in General LLM at #4 against #35.
Reasoning: As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Terra in Reasoning at #2 against #35.
Science: As of Oct 14, 2026, GPT-5.6 Terra leads Claude Opus 4.6 in Science at #15 against #32.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Terra in Coding › Web dev at #35 against #42.
Long context: As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Terra in Long context at #2 against #46.
Factuality: As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Terra in Factuality at #3 against #24.
Claude Opus 4.6 · GPT-5.6 Terra
Claude Opus 4.6 or GPT-5.6 Terra?
As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Terra in 5 of 6 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 4.6 or GPT-5.6 Terra for General LLM?
As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Terra in General LLM at #4 against #35.
Claude Opus 4.6 or GPT-5.6 Terra for Reasoning?
As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Terra in Reasoning at #2 against #35.
Claude Opus 4.6 or GPT-5.6 Terra for Science?
As of Oct 14, 2026, GPT-5.6 Terra leads Claude Opus 4.6 in Science at #15 against #32.