Claude Fable 5.1 vs GPT-5.6 Terra
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.6 Terra in 9 of 9 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, Factuality, and Abstraction (ARC).
Claude Fable 5.1
Yes. SOTA in co-SOTA in Factuality.
GPT-5.6 Terra
#4 Best recorded rank: #4 in Abstraction (ARC), as of Oct 14, 2026.
| Category | Claude Fable 5.1 | GPT-5.6 Terra |
|---|---|---|
| General LLM | #6 · Was SOTA · General LLM Margin 4.08163265306122 LMArena leaderboard dataset · Oct 13, 2026 | #35 · #35 in General LLM Margin 23.80952380952381 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #5 · Was SOTA · Reasoning Margin 4.109589041095887 LMArena leaderboard dataset · Oct 13, 2026 | #35 · #35 in Reasoning Margin 24.657534246575338 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #2 · Near-SOTA · Math Margin 2.2222222222222285 Epoch AI benchmarking hub · Sep 1, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | — | #15 · #15 in Science Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
| Coding | #3 · Near-SOTA · Coding Margin 18.181818181818187 Terminal-Bench Harbor Hub · Oct 6, 2026 | #13 · #13 in Coding Margin 63.63636363636363 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #3 · Near-SOTA · Coding › Agentic Margin 18.181818181818187 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 | #5 · Near-SOTA · Coding › Web dev Margin 3.738317757009341 LMArena leaderboard dataset · Oct 13, 2026 | #42 · #42 in Coding › Web dev Margin 38.3177570093458 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #6 · Was SOTA · Long context Margin 4.08163265306122 LMArena leaderboard dataset · Oct 13, 2026 | #46 · #46 in Long context Margin 31.292517006802726 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #6 · #6 in Vision Margin 18.421052631578945 Epoch AI benchmarking hub · Sep 1, 2026 | #11 · #11 in Vision Margin 31.578947368421055 Epoch AI benchmarking hub · Jul 9, 2026 |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 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 · Sep 1, 2026 | #4 · #4 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
Claude Fable 5.1: $20 per 1M blended tokens.
GPT-5.6 Terra: $4.5 per 1M blended tokens.
Claude Fable 5.1: closed weights.
GPT-5.6 Terra: closed weights.
General LLM: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.6 Terra in General LLM at #6 against #35.
Reasoning: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.6 Terra in Reasoning at #5 against #35.
Coding: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.6 Terra in Coding at #3 against #13.
Coding › Agentic: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.6 Terra in Coding › Agentic at #3 against #13.
Coding › Web dev: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.6 Terra in Coding › Web dev at #5 against #42.
Long context: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.6 Terra in Long context at #6 against #46.
Vision: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.6 Terra in Vision at #6 against #11.
Factuality: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.6 Terra in Factuality at #1 against #24.
Abstraction (ARC): As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.6 Terra in Abstraction (ARC) at #3 against #4.
Claude Fable 5.1 · GPT-5.6 Terra
Claude Fable 5.1 or GPT-5.6 Terra?
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.6 Terra in 9 of 9 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, Factuality, and Abstraction (ARC).
Claude Fable 5.1 or GPT-5.6 Terra for General LLM?
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.6 Terra in General LLM at #6 against #35.
Claude Fable 5.1 or GPT-5.6 Terra for Reasoning?
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.6 Terra in Reasoning at #5 against #35.
Claude Fable 5.1 or GPT-5.6 Terra for Coding?
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.6 Terra in Coding at #3 against #13.