Claude Fable 5 vs Claude Opus 4
As of Oct 14, 2026, Claude Fable 5 leads Claude Opus 4 in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Abstraction (ARC).
Claude Fable 5
Close. Near-SOTA in General LLM, rank #3.
Claude Opus 4
It used to be. Was SOTA in Reasoning.
| Category | Claude Fable 5 | Claude Opus 4 |
|---|---|---|
| General LLM | #3 · Near-SOTA · General LLM Margin 2.040816326530617 LMArena leaderboard dataset · Oct 13, 2026 | #102 · #102 in General LLM Margin 69.38775510204081 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #3 · Near-SOTA · Reasoning Margin 2.7397260273972535 LMArena leaderboard dataset · Oct 13, 2026 | #97 · Was SOTA · Reasoning Margin 67.12328767123287 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #29 · #29 in Math Margin 62.22222222222222 Epoch AI benchmarking hub · May 22, 2025 |
| Science | #56 · #56 in Science Margin — Epoch AI benchmarking hub · Jun 9, 2026 | #91 · #91 in Science Margin — Epoch AI benchmarking hub · May 22, 2025 |
| Coding | #6 · #6 in Coding Margin 31.818181818181813 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · May 22, 2025 |
| 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 | #70 · #70 in Long context Margin 47.61904761904762 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 | — |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jun 9, 2026 | #69 · #69 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · May 22, 2025 |
Claude Fable 5: $20 per 1M blended tokens.
Claude Opus 4: price per 1M tokens is unset in the catalog.
Claude Fable 5: closed weights.
Claude Opus 4: closed weights.
General LLM: As of Oct 14, 2026, Claude Fable 5 leads Claude Opus 4 in General LLM at #3 against #102.
Reasoning: As of Oct 14, 2026, Claude Fable 5 leads Claude Opus 4 in Reasoning at #3 against #97.
Science: As of Oct 14, 2026, Claude Fable 5 leads Claude Opus 4 in Science at #56 against #91.
Long context: As of Oct 14, 2026, Claude Fable 5 leads Claude Opus 4 in Long context at #3 against #70.
Abstraction (ARC): As of Oct 14, 2026, Claude Fable 5 leads Claude Opus 4 in Abstraction (ARC) at #1 against #69.
Claude Fable 5 · Claude Opus 4
Claude Fable 5 or Claude Opus 4?
As of Oct 14, 2026, Claude Fable 5 leads Claude Opus 4 in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Abstraction (ARC).
Claude Fable 5 or Claude Opus 4 for General LLM?
As of Oct 14, 2026, Claude Fable 5 leads Claude Opus 4 in General LLM at #3 against #102.
Claude Fable 5 or Claude Opus 4 for Reasoning?
As of Oct 14, 2026, Claude Fable 5 leads Claude Opus 4 in Reasoning at #3 against #97.
Claude Fable 5 or Claude Opus 4 for Science?
As of Oct 14, 2026, Claude Fable 5 leads Claude Opus 4 in Science at #56 against #91.