Claude Fable 5.1 vs Claude Opus 4.6
As of Oct 14, 2026, Claude Fable 5.1 leads Claude Opus 4.6 in 3 of 6 shared categories: Math, Coding › Web dev, and Factuality.
Claude Fable 5.1
Yes. SOTA in co-SOTA in Factuality.
Claude Opus 4.6
Close. Near-SOTA in Reasoning, rank #2.
| Category | Claude Fable 5.1 | Claude Opus 4.6 |
|---|---|---|
| General LLM | #6 · Was SOTA · General LLM Margin 4.08163265306122 LMArena leaderboard dataset · Oct 13, 2026 | #4 · Near-SOTA · General LLM Margin 2.7210884353741562 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #5 · Was SOTA · Reasoning Margin 4.109589041095887 LMArena leaderboard dataset · Oct 13, 2026 | #2 · Near-SOTA · Reasoning Margin 2.0547945205479436 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #2 · Near-SOTA · Math Margin 2.2222222222222285 Epoch AI benchmarking hub · Sep 1, 2026 | #11 · #11 in Math Margin 22.22222222222223 Epoch AI benchmarking hub · Feb 5, 2026 |
| Science | — | #32 · #32 in Science Margin — Epoch AI benchmarking hub · Feb 5, 2026 |
| Coding | #3 · Near-SOTA · Coding Margin 18.181818181818187 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Feb 5, 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 3.738317757009341 LMArena leaderboard dataset · Oct 13, 2026 | #35 · Was SOTA · Coding › Web dev Margin 31.775700934579433 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #6 · Was SOTA · Long context Margin 4.08163265306122 LMArena leaderboard dataset · Oct 13, 2026 | #2 · Near-SOTA · Long context Margin 0.6802721088435391 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 | #3 · Near-SOTA · Factuality Margin 2.9850746268656536 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 Opus 4.6: $10 per 1M blended tokens.
Claude Fable 5.1: closed weights.
Claude Opus 4.6: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.6 leads Claude Fable 5.1 in General LLM at #4 against #6.
Reasoning: As of Oct 14, 2026, Claude Opus 4.6 leads Claude Fable 5.1 in Reasoning at #2 against #5.
Math: As of Oct 14, 2026, Claude Fable 5.1 leads Claude Opus 4.6 in Math at #2 against #11.
Coding › Web dev: As of Oct 14, 2026, Claude Fable 5.1 leads Claude Opus 4.6 in Coding › Web dev at #5 against #35.
Long context: As of Oct 14, 2026, Claude Opus 4.6 leads Claude Fable 5.1 in Long context at #2 against #6.
Factuality: As of Oct 14, 2026, Claude Fable 5.1 leads Claude Opus 4.6 in Factuality at #1 against #3.
Claude Fable 5.1 · Claude Opus 4.6
Claude Fable 5.1 or Claude Opus 4.6?
As of Oct 14, 2026, Claude Fable 5.1 leads Claude Opus 4.6 in 3 of 6 shared categories: Math, Coding › Web dev, and Factuality.
Claude Fable 5.1 or Claude Opus 4.6 for General LLM?
As of Oct 14, 2026, Claude Opus 4.6 leads Claude Fable 5.1 in General LLM at #4 against #6.
Claude Fable 5.1 or Claude Opus 4.6 for Reasoning?
As of Oct 14, 2026, Claude Opus 4.6 leads Claude Fable 5.1 in Reasoning at #2 against #5.
Claude Fable 5.1 or Claude Opus 4.6 for Math?
As of Oct 14, 2026, Claude Fable 5.1 leads Claude Opus 4.6 in Math at #2 against #11.