Claude Opus 4.8 vs GPT-5.6 Terra
As of Oct 14, 2026, Claude Opus 4.8 leads GPT-5.6 Terra in 7 of 10 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, and Factuality.
Claude Opus 4.8
It used to be. Was SOTA in Coding › Web dev.
GPT-5.6 Terra
#4 Best recorded rank: #4 in Abstraction (ARC), as of Oct 14, 2026.
| Category | Claude Opus 4.8 | GPT-5.6 Terra |
|---|---|---|
| General LLM | #20 · #20 in General LLM Margin 13.605442176870753 LMArena leaderboard dataset · Oct 13, 2026 | #35 · #35 in General LLM Margin 23.80952380952381 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #10 · #10 in Reasoning Margin 7.534246575342465 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 | #27 · #27 in Science Margin — Epoch AI benchmarking hub · May 28, 2026 | #15 · #15 in Science Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
| Coding | #12 · #12 in Coding Margin 59.09090909090909 Terminal-Bench Harbor Hub · Oct 6, 2026 | #13 · #13 in Coding Margin 63.63636363636363 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #12 · #12 in Coding › Agentic Margin 59.09090909090909 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 | #33 · Was SOTA · Coding › Web dev Margin 29.90654205607477 LMArena leaderboard dataset · Oct 13, 2026 | #42 · #42 in Coding › Web dev Margin 38.3177570093458 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #10 · Was SOTA · Long context Margin 6.802721088435391 LMArena leaderboard dataset · Oct 13, 2026 | #46 · #46 in Long context Margin 31.292517006802726 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #13 · #13 in Vision Margin 36.842105263157904 Epoch AI benchmarking hub · May 28, 2026 | #11 · #11 in Vision Margin 31.578947368421055 Epoch AI benchmarking hub · Jul 9, 2026 |
| Factuality | #21 · #21 in Factuality Margin 16.417910447761187 LMArena leaderboard dataset · Oct 13, 2026 | #24 · #24 in Factuality Margin 18.656716417910445 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #12 · #12 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · May 28, 2026 | #4 · #4 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
Claude Opus 4.8: $10 per 1M blended tokens.
GPT-5.6 Terra: $4.5 per 1M blended tokens.
Claude Opus 4.8: closed weights.
GPT-5.6 Terra: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.8 leads GPT-5.6 Terra in General LLM at #20 against #35.
Reasoning: As of Oct 14, 2026, Claude Opus 4.8 leads GPT-5.6 Terra in Reasoning at #10 against #35.
Science: As of Oct 14, 2026, GPT-5.6 Terra leads Claude Opus 4.8 in Science at #15 against #27.
Coding: As of Oct 14, 2026, Claude Opus 4.8 leads GPT-5.6 Terra in Coding at #12 against #13.
Coding › Agentic: As of Oct 14, 2026, Claude Opus 4.8 leads GPT-5.6 Terra in Coding › Agentic at #12 against #13.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 4.8 leads GPT-5.6 Terra in Coding › Web dev at #33 against #42.
Long context: As of Oct 14, 2026, Claude Opus 4.8 leads GPT-5.6 Terra in Long context at #10 against #46.
Vision: As of Oct 14, 2026, GPT-5.6 Terra leads Claude Opus 4.8 in Vision at #11 against #13.
Factuality: As of Oct 14, 2026, Claude Opus 4.8 leads GPT-5.6 Terra in Factuality at #21 against #24.
Abstraction (ARC): As of Oct 14, 2026, GPT-5.6 Terra leads Claude Opus 4.8 in Abstraction (ARC) at #4 against #12.
Claude Opus 4.8 · GPT-5.6 Terra
Claude Opus 4.8 or GPT-5.6 Terra?
As of Oct 14, 2026, Claude Opus 4.8 leads GPT-5.6 Terra in 7 of 10 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, and Factuality.
Claude Opus 4.8 or GPT-5.6 Terra for General LLM?
As of Oct 14, 2026, Claude Opus 4.8 leads GPT-5.6 Terra in General LLM at #20 against #35.
Claude Opus 4.8 or GPT-5.6 Terra for Reasoning?
As of Oct 14, 2026, Claude Opus 4.8 leads GPT-5.6 Terra in Reasoning at #10 against #35.
Claude Opus 4.8 or GPT-5.6 Terra for Science?
As of Oct 14, 2026, GPT-5.6 Terra leads Claude Opus 4.8 in Science at #15 against #27.