Claude Fable 5 vs Claude Opus 5.5
As of Oct 14, 2026, Claude Fable 5 leads Claude Opus 5.5 in 0 of 10 shared categories.
Claude Fable 5
Close. Near-SOTA in General LLM, rank #3.
Claude Opus 5.5
Yes. SOTA in co-SOTA in Reasoning, co-SOTA in Coding, co-SOTA in Coding › Agentic, Coding › Web dev, co-SOTA in Long context and co-SOTA in Factuality.
| Category | Claude Fable 5 | Claude Opus 5.5 |
|---|---|---|
| General LLM | #3 · Near-SOTA · General LLM Margin 2.040816326530617 LMArena leaderboard dataset · Oct 13, 2026 | #2 · Near-SOTA · General LLM Margin 1.3605442176870781 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #3 · Near-SOTA · Reasoning Margin 2.7397260273972535 LMArena leaderboard dataset · Oct 13, 2026 | #1 · Co-SOTA · Reasoning Margin 0 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 | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 |
| Coding | #6 · #6 in Coding Margin 31.818181818181813 Terminal-Bench Harbor Hub · Oct 6, 2026 | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #6 · #6 in Coding › Agentic Margin 31.818181818181813 Terminal-Bench Harbor Hub · Oct 6, 2026 | #1 · Co-SOTA · Coding › Agentic Margin 0 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 | #1 · SOTA · Coding › Web dev Margin 0 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #3 · Near-SOTA · Long context Margin 2.040816326530603 LMArena leaderboard dataset · Oct 13, 2026 | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #5 · Was SOTA · Vision Margin 15.78947368421052 Epoch AI benchmarking hub · Jun 9, 2026 | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 2026 |
| Factuality | #7 · Was SOTA · Factuality Margin 5.97014925373135 LMArena leaderboard dataset · Oct 13, 2026 | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jun 9, 2026 | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 |
Claude Fable 5: $20 per 1M blended tokens.
Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.
Claude Fable 5: closed weights.
Claude Opus 5.5: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5 in General LLM at #2 against #3.
Reasoning: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5 in Reasoning at #1 against #3.
Science: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5 in Science at #31 against #56.
Coding: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5 in Coding at #1 against #6.
Coding › Agentic: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5 in Coding › Agentic at #1 against #6.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5 in Coding › Web dev at #1 against #17.
Long context: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5 in Long context at #1 against #3.
Vision: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5 in Vision at #4 against #5.
Factuality: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5 in Factuality at #1 against #7.
Abstraction (ARC): As of Oct 14, 2026, Claude Fable 5 and Claude Opus 5.5 share #1 in Abstraction (ARC).
Claude Fable 5 · Claude Opus 5.5
Claude Fable 5 or Claude Opus 5.5?
As of Oct 14, 2026, Claude Fable 5 leads Claude Opus 5.5 in 0 of 10 shared categories.
Claude Fable 5 or Claude Opus 5.5 for General LLM?
As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5 in General LLM at #2 against #3.
Claude Fable 5 or Claude Opus 5.5 for Reasoning?
As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5 in Reasoning at #1 against #3.
Claude Fable 5 or Claude Opus 5.5 for Science?
As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5 in Science at #31 against #56.