Claude Sonnet 5.5 vs GPT-5.6 Terra
As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in 9 of 9 shared categories: General LLM, Reasoning, Science, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, and Factuality.
Claude Sonnet 5.5
Yes. SOTA in co-SOTA in Coding, co-SOTA in Coding › Agentic and co-SOTA in Vision.
GPT-5.6 Terra
#4 Best recorded rank: #4 in Abstraction (ARC), as of Oct 14, 2026.
| Category | Claude Sonnet 5.5 | GPT-5.6 Terra |
|---|---|---|
| General LLM | #27 · #27 in General LLM Margin 18.367346938775512 LMArena leaderboard dataset · Oct 13, 2026 | #35 · #35 in General LLM Margin 23.80952380952381 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #18 · #18 in Reasoning Margin 13.013698630136986 LMArena leaderboard dataset · Oct 13, 2026 | #35 · #35 in Reasoning Margin 24.657534246575338 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #4 · #4 in Math Margin 6.666666666666671 Epoch AI benchmarking hub · Sep 28, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #3 · #3 in Science Margin — Epoch AI benchmarking hub · Sep 28, 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 | #3 · Near-SOTA · Coding › Web dev Margin 1.8691588785046775 LMArena leaderboard dataset · Oct 13, 2026 | #42 · #42 in Coding › Web dev Margin 38.3177570093458 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #11 · #11 in Long context Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #46 · #46 in Long context Margin 31.292517006802726 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 28, 2026 | #11 · #11 in Vision Margin 31.578947368421055 Epoch AI benchmarking hub · Jul 9, 2026 |
| Factuality | #16 · #16 in Factuality Margin 12.68656716417911 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 Sonnet 5.5: $4.000000000000001 per 1M blended tokens.
GPT-5.6 Terra: $4.5 per 1M blended tokens.
Claude Sonnet 5.5: closed weights.
GPT-5.6 Terra: closed weights.
General LLM: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in General LLM at #27 against #35.
Reasoning: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in Reasoning at #18 against #35.
Science: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in Science at #3 against #15.
Coding: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in Coding at #1 against #13.
Coding › Agentic: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in Coding › Agentic at #1 against #13.
Coding › Web dev: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in Coding › Web dev at #3 against #42.
Long context: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in Long context at #11 against #46.
Vision: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in Vision at #1 against #11.
Factuality: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in Factuality at #16 against #24.
Claude Sonnet 5.5 · GPT-5.6 Terra
Claude Sonnet 5.5 or GPT-5.6 Terra?
As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in 9 of 9 shared categories: General LLM, Reasoning, Science, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, and Factuality.
Claude Sonnet 5.5 or GPT-5.6 Terra for General LLM?
As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in General LLM at #27 against #35.
Claude Sonnet 5.5 or GPT-5.6 Terra for Reasoning?
As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in Reasoning at #18 against #35.
Claude Sonnet 5.5 or GPT-5.6 Terra for Science?
As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-5.6 Terra in Science at #3 against #15.