Claude Fable 5 vs GPT-5.5 Instant
As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 Instant in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Factuality.
Claude Fable 5
Close. Near-SOTA in General LLM, rank #3.
GPT-5.5 Instant
#31 Best current rank: #31 in General LLM, as of Oct 14, 2026.
| Category | Claude Fable 5 | GPT-5.5 Instant |
|---|---|---|
| General LLM | #3 · Near-SOTA · General LLM Margin 2.040816326530617 LMArena leaderboard dataset · Oct 13, 2026 | #31 · #31 in General LLM Margin 21.088435374149654 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #3 · Near-SOTA · Reasoning Margin 2.7397260273972535 LMArena leaderboard dataset · Oct 13, 2026 | #33 · #33 in Reasoning Margin 23.28767123287672 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 | #65 · #65 in Science Margin — Epoch AI benchmarking hub · May 5, 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 | — |
| Long context | #3 · Near-SOTA · Long context Margin 2.040816326530603 LMArena leaderboard dataset · Oct 13, 2026 | #39 · #39 in Long context Margin 26.530612244897952 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #5 · Was SOTA · Vision Margin 15.78947368421052 Epoch AI benchmarking hub · Jun 9, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #7 · Was SOTA · Factuality Margin 5.97014925373135 LMArena leaderboard dataset · Oct 13, 2026 | #64 · #64 in Factuality Margin 48.507462686567166 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jun 9, 2026 | — |
Claude Fable 5: $20 per 1M blended tokens.
GPT-5.5 Instant: price per 1M tokens is unset in the catalog.
Claude Fable 5: closed weights.
GPT-5.5 Instant: closed weights.
General LLM: As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 Instant in General LLM at #3 against #31.
Reasoning: As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 Instant in Reasoning at #3 against #33.
Science: As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 Instant in Science at #56 against #65.
Long context: As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 Instant in Long context at #3 against #39.
Factuality: As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 Instant in Factuality at #7 against #64.
Claude Fable 5 · GPT-5.5 Instant
Claude Fable 5 or GPT-5.5 Instant?
As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 Instant in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Factuality.
Claude Fable 5 or GPT-5.5 Instant for General LLM?
As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 Instant in General LLM at #3 against #31.
Claude Fable 5 or GPT-5.5 Instant for Reasoning?
As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 Instant in Reasoning at #3 against #33.
Claude Fable 5 or GPT-5.5 Instant for Science?
As of Oct 14, 2026, Claude Fable 5 leads GPT-5.5 Instant in Science at #56 against #65.