Claude Fable 5 vs GPT-5.5
As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 in 6 of 8 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, Vision, and Abstraction (ARC).
Claude Fable 5
Close. Near-SOTA in General LLM, rank #3.
GPT-5.5
It used to be. Was SOTA in General LLM.
| Category | Claude Fable 5 | GPT-5.5 |
|---|---|---|
| General LLM | #3 · Near-SOTA · General LLM Margin 2.040816326530617 LMArena leaderboard dataset · Oct 13, 2026 | #21 · Was SOTA · General LLM Margin 14.285714285714292 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #3 · Near-SOTA · Reasoning Margin 2.7397260273972535 LMArena leaderboard dataset · Oct 13, 2026 | #25 · #25 in Reasoning Margin 17.808219178082197 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 | #56 · #56 in Science Margin — Epoch AI benchmarking hub · Jun 9, 2026 | #30 · #30 in Science Margin — Epoch AI benchmarking hub · Apr 23, 2026 |
| Coding | #6 · #6 in Coding Margin 31.818181818181813 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #6 · #6 in Coding › Agentic Margin 31.818181818181813 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #17 · Was SOTA · Coding › Web dev Margin 14.953271028037378 LMArena leaderboard dataset · Oct 13, 2026 | #44 · #44 in Coding › Web dev Margin 40.18691588785047 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #3 · Near-SOTA · Long context Margin 2.040816326530603 LMArena leaderboard dataset · Oct 13, 2026 | #23 · Was SOTA · Long context Margin 15.646258503401356 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #5 · Was SOTA · Vision Margin 15.78947368421052 Epoch AI benchmarking hub · Jun 9, 2026 | #10 · Was SOTA · Vision Margin 28.94736842105263 Epoch AI benchmarking hub · Apr 23, 2026 |
| Factuality | #7 · Was SOTA · Factuality Margin 5.97014925373135 LMArena leaderboard dataset · Oct 13, 2026 | #5 · Was SOTA · Factuality Margin 4.477611940298502 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jun 9, 2026 | #7 · #7 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Apr 23, 2026 |
Claude Fable 5: $20 per 1M blended tokens.
GPT-5.5: $11.25 per 1M blended tokens.
Claude Fable 5: closed weights.
GPT-5.5: closed weights.
General LLM: As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 in General LLM at #3 against #21.
Reasoning: As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 in Reasoning at #3 against #25.
Science: As of Oct 14, 2026, GPT-5.5 leads Claude Fable 5 in Science at #30 against #56.
Coding › Web dev: As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 in Coding › Web dev at #17 against #44.
Long context: As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 in Long context at #3 against #23.
Vision: As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 in Vision at #5 against #10.
Factuality: As of Oct 14, 2026, GPT-5.5 leads Claude Fable 5 in Factuality at #5 against #7.
Abstraction (ARC): As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 in Abstraction (ARC) at #1 against #7.
Claude Fable 5 or GPT-5.5?
As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 in 6 of 8 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, Vision, and Abstraction (ARC).
Claude Fable 5 or GPT-5.5 for General LLM?
As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 in General LLM at #3 against #21.
Claude Fable 5 or GPT-5.5 for Reasoning?
As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 in Reasoning at #3 against #25.
Claude Fable 5 or GPT-5.5 for Science?
As of Oct 14, 2026, GPT-5.5 leads Claude Fable 5 in Science at #30 against #56.