Claude 3.5 Sonnet vs Claude Fable 5.1
As of Oct 15, 2026, Claude 3.5 Sonnet leads Claude Fable 5.1 in 0 of 4 shared categories.
Claude 3.5 Sonnet
It used to be. Was SOTA in General LLM.
Claude Fable 5.1
Yes. SOTA in Factuality (tied).
| Category | Claude 3.5 Sonnet | Claude Fable 5.1 |
|---|---|---|
| General LLM | #181 · Was SOTA · General LLM Margin 96.27659574468085 LMArena leaderboard dataset · Oct 13, 2026 | #6 · Near-SOTA · General LLM Margin 3.191489361702125 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #175 · Was SOTA · Reasoning Margin 93.61702127659575 LMArena leaderboard dataset · Oct 13, 2026 | #5 · Near-SOTA · Reasoning Margin 3.191489361702125 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #43 · #43 in Math Margin 95.55555555555556 Epoch AI benchmarking hub · Oct 22, 2024 | #2 · Near-SOTA · Math Margin 2.2222222222222285 Epoch AI benchmarking hub · Sep 1, 2026 |
| Science | #119 · #119 in Science Margin — Epoch AI benchmarking hub · Oct 22, 2024 | — |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #3 · Near-SOTA · Coding Margin 18.181818181818187 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | — | #3 · Near-SOTA · Coding › Agentic Margin 18.181818181818187 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Web dev | — | #5 · Near-SOTA · Coding › Web dev Margin 3.200000000000003 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #163 · Was SOTA · Long context Margin 86.70212765957447 LMArena leaderboard dataset · Oct 13, 2026 | #6 · Near-SOTA · Long context Margin 3.1914893617021107 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | #6 · #6 in Vision Margin 18.421052631578945 Epoch AI benchmarking hub · Sep 1, 2026 |
| Factuality | — | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 1, 2026 |
Claude 3.5 Sonnet: price per 1M tokens is unset in the catalog.
Claude Fable 5.1: $20 per 1M blended tokens.
Claude 3.5 Sonnet: closed weights.
Claude Fable 5.1: closed weights.
General LLM: As of Oct 15, 2026, Claude Fable 5.1 leads Claude 3.5 Sonnet in General LLM at #6 against #181.
Reasoning: As of Oct 15, 2026, Claude Fable 5.1 leads Claude 3.5 Sonnet in Reasoning at #5 against #175.
Math: As of Oct 15, 2026, Claude Fable 5.1 leads Claude 3.5 Sonnet in Math at #2 against #43.
Long context: As of Oct 15, 2026, Claude Fable 5.1 leads Claude 3.5 Sonnet in Long context at #6 against #163.
Claude 3.5 Sonnet · Claude Fable 5.1
Claude 3.5 Sonnet or Claude Fable 5.1?
As of Oct 15, 2026, Claude 3.5 Sonnet leads Claude Fable 5.1 in 0 of 4 shared categories.
Claude 3.5 Sonnet or Claude Fable 5.1 for General LLM?
As of Oct 15, 2026, Claude Fable 5.1 leads Claude 3.5 Sonnet in General LLM at #6 against #181.
Claude 3.5 Sonnet or Claude Fable 5.1 for Reasoning?
As of Oct 15, 2026, Claude Fable 5.1 leads Claude 3.5 Sonnet in Reasoning at #5 against #175.
Claude 3.5 Sonnet or Claude Fable 5.1 for Math?
As of Oct 15, 2026, Claude Fable 5.1 leads Claude 3.5 Sonnet in Math at #2 against #43.