Claude Fable 5.1 vs Claude Sonnet 5
As of Oct 14, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in 7 of 7 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, and Factuality.
Claude Fable 5.1
Yes. SOTA in co-SOTA in Factuality.
Claude Sonnet 5
#19 Best current rank: #19 in Coding, as of Oct 14, 2026.
| Category | Claude Fable 5.1 | Claude Sonnet 5 |
|---|---|---|
| General LLM | #6 · Was SOTA · General LLM Margin 4.08163265306122 LMArena leaderboard dataset · Oct 13, 2026 | #39 · #39 in General LLM Margin 26.530612244897952 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #5 · Was SOTA · Reasoning Margin 4.109589041095887 LMArena leaderboard dataset · Oct 13, 2026 | #34 · #34 in Reasoning Margin 23.972602739726028 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #2 · Near-SOTA · Math Margin 2.2222222222222285 Epoch AI benchmarking hub · Sep 1, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | — | #32 · #32 in Science Margin — Epoch AI benchmarking hub · Jun 30, 2026 |
| Coding | #3 · Near-SOTA · Coding Margin 18.181818181818187 Terminal-Bench Harbor Hub · Oct 6, 2026 | #19 · #19 in Coding Margin 95.45454545454545 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #3 · Near-SOTA · Coding › Agentic Margin 18.181818181818187 Terminal-Bench Harbor Hub · Oct 6, 2026 | #19 · #19 in Coding › Agentic Margin 95.45454545454545 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Web dev | #5 · Near-SOTA · Coding › Web dev Margin 3.738317757009341 LMArena leaderboard dataset · Oct 13, 2026 | #38 · #38 in Coding › Web dev Margin 34.57943925233644 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #6 · Was SOTA · Long context Margin 4.08163265306122 LMArena leaderboard dataset · Oct 13, 2026 | #31 · #31 in Long context Margin 21.088435374149654 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #6 · #6 in Vision Margin 18.421052631578945 Epoch AI benchmarking hub · Sep 1, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #47 · #47 in Factuality Margin 35.82089552238806 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 1, 2026 | — |
Claude Fable 5.1: $20 per 1M blended tokens.
Claude Sonnet 5: $4.000000000000001 per 1M blended tokens.
Claude Fable 5.1: closed weights.
Claude Sonnet 5: closed weights.
General LLM: As of Oct 14, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in General LLM at #6 against #39.
Reasoning: As of Oct 14, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in Reasoning at #5 against #34.
Coding: As of Oct 14, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in Coding at #3 against #19.
Coding › Agentic: As of Oct 14, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in Coding › Agentic at #3 against #19.
Coding › Web dev: As of Oct 14, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in Coding › Web dev at #5 against #38.
Long context: As of Oct 14, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in Long context at #6 against #31.
Factuality: As of Oct 14, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in Factuality at #1 against #47.
Claude Fable 5.1 · Claude Sonnet 5
Claude Fable 5.1 or Claude Sonnet 5?
As of Oct 14, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in 7 of 7 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, and Factuality.
Claude Fable 5.1 or Claude Sonnet 5 for General LLM?
As of Oct 14, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in General LLM at #6 against #39.
Claude Fable 5.1 or Claude Sonnet 5 for Reasoning?
As of Oct 14, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in Reasoning at #5 against #34.
Claude Fable 5.1 or Claude Sonnet 5 for Coding?
As of Oct 14, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in Coding at #3 against #19.