Claude Sonnet 4.5 vs GPT-5.6 Terra
As of Oct 14, 2026, Claude Sonnet 4.5 leads GPT-5.6 Terra in 1 of 7 shared categories: Long context.
Claude Sonnet 4.5
It used to be. Was SOTA in General LLM.
GPT-5.6 Terra
#4 Best recorded rank: #4 in Abstraction (ARC), as of Oct 14, 2026.
| Category | Claude Sonnet 4.5 | GPT-5.6 Terra |
|---|---|---|
| General LLM | #49 · Was SOTA · General LLM Margin 33.33333333333333 LMArena leaderboard dataset · Oct 13, 2026 | #35 · #35 in General LLM Margin 23.80952380952381 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #40 · Was SOTA · Reasoning Margin 28.082191780821915 LMArena leaderboard dataset · Oct 13, 2026 | #35 · #35 in Reasoning Margin 24.657534246575338 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #25 · #25 in Math Margin 53.333333333333336 Epoch AI benchmarking hub · Sep 29, 2025 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #82 · #82 in Science Margin — Epoch AI benchmarking hub · Sep 29, 2025 | #15 · #15 in Science Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Sep 29, 2025 | #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 | #78 · Was SOTA · Coding › Web dev Margin 71.96261682242991 LMArena leaderboard dataset · Oct 13, 2026 | #42 · #42 in Coding › Web dev Margin 38.3177570093458 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #29 · Was SOTA · Long context Margin 19.72789115646259 LMArena leaderboard dataset · Oct 13, 2026 | #46 · #46 in Long context Margin 31.292517006802726 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | — | #11 · #11 in Vision Margin 31.578947368421055 Epoch AI benchmarking hub · Jul 9, 2026 |
| Factuality | #50 · #50 in Factuality Margin 38.059701492537314 LMArena leaderboard dataset · Oct 13, 2026 | #24 · #24 in Factuality Margin 18.656716417910445 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #66 · #66 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 29, 2025 | #4 · #4 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
Claude Sonnet 4.5: $6 per 1M blended tokens.
GPT-5.6 Terra: $4.5 per 1M blended tokens.
Claude Sonnet 4.5: closed weights.
GPT-5.6 Terra: closed weights.
General LLM: As of Oct 14, 2026, GPT-5.6 Terra leads Claude Sonnet 4.5 in General LLM at #35 against #49.
Reasoning: As of Oct 14, 2026, GPT-5.6 Terra leads Claude Sonnet 4.5 in Reasoning at #35 against #40.
Science: As of Oct 14, 2026, GPT-5.6 Terra leads Claude Sonnet 4.5 in Science at #15 against #82.
Coding › Web dev: As of Oct 14, 2026, GPT-5.6 Terra leads Claude Sonnet 4.5 in Coding › Web dev at #42 against #78.
Long context: As of Oct 14, 2026, Claude Sonnet 4.5 leads GPT-5.6 Terra in Long context at #29 against #46.
Factuality: As of Oct 14, 2026, GPT-5.6 Terra leads Claude Sonnet 4.5 in Factuality at #24 against #50.
Abstraction (ARC): As of Oct 14, 2026, GPT-5.6 Terra leads Claude Sonnet 4.5 in Abstraction (ARC) at #4 against #66.
Claude Sonnet 4.5 · GPT-5.6 Terra
Claude Sonnet 4.5 or GPT-5.6 Terra?
As of Oct 14, 2026, Claude Sonnet 4.5 leads GPT-5.6 Terra in 1 of 7 shared categories: Long context.
Claude Sonnet 4.5 or GPT-5.6 Terra for General LLM?
As of Oct 14, 2026, GPT-5.6 Terra leads Claude Sonnet 4.5 in General LLM at #35 against #49.
Claude Sonnet 4.5 or GPT-5.6 Terra for Reasoning?
As of Oct 14, 2026, GPT-5.6 Terra leads Claude Sonnet 4.5 in Reasoning at #35 against #40.
Claude Sonnet 4.5 or GPT-5.6 Terra for Science?
As of Oct 14, 2026, GPT-5.6 Terra leads Claude Sonnet 4.5 in Science at #15 against #82.