Claude Fable 5.1 vs Grok 4.3
As of Oct 15, 2026, Claude Fable 5.1 leads Grok 4.3 in 6 of 6 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, Vision, and Factuality.
Claude Fable 5.1
Yes. SOTA in Factuality (tied).
Grok 4.3
#32 Best current rank: #32 in Vision, as of Oct 15, 2026.
| Category | Claude Fable 5.1 | Grok 4.3 |
|---|---|---|
| General LLM | #6 · Near-SOTA · General LLM Margin 3.191489361702125 LMArena leaderboard dataset · Oct 13, 2026 | #85 · #85 in General LLM Margin 45.212765957446805 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #5 · Near-SOTA · Reasoning Margin 3.191489361702125 LMArena leaderboard dataset · Oct 13, 2026 | #96 · #96 in Reasoning Margin 51.59574468085106 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 | — | #41 · #41 in Science Margin — Epoch AI benchmarking hub · Apr 17, 2026 |
| Coding | #3 · Near-SOTA · Coding Margin 18.181818181818187 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 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 | #95 · #95 in Coding › Web dev Margin 75.2 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #6 · Near-SOTA · Long context Margin 3.1914893617021107 LMArena leaderboard dataset · Oct 13, 2026 | #94 · #94 in Long context Margin 50 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #6 · #6 in Vision Margin 18.421052631578945 Epoch AI benchmarking hub · Sep 1, 2026 | #32 · #32 in Vision Margin 97.36842105263158 Epoch AI benchmarking hub · Apr 17, 2026 |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #111 · #111 in Factuality Margin 65.11627906976744 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.
Grok 4.3: $1.5625000000000002 per 1M blended tokens.
Claude Fable 5.1: closed weights.
Grok 4.3: closed weights.
General LLM: As of Oct 15, 2026, Claude Fable 5.1 leads Grok 4.3 in General LLM at #6 against #85.
Reasoning: As of Oct 15, 2026, Claude Fable 5.1 leads Grok 4.3 in Reasoning at #5 against #96.
Coding › Web dev: As of Oct 15, 2026, Claude Fable 5.1 leads Grok 4.3 in Coding › Web dev at #5 against #95.
Long context: As of Oct 15, 2026, Claude Fable 5.1 leads Grok 4.3 in Long context at #6 against #94.
Vision: As of Oct 15, 2026, Claude Fable 5.1 leads Grok 4.3 in Vision at #6 against #32.
Factuality: As of Oct 15, 2026, Claude Fable 5.1 leads Grok 4.3 in Factuality at #1 against #111.
Claude Fable 5.1 or Grok 4.3?
As of Oct 15, 2026, Claude Fable 5.1 leads Grok 4.3 in 6 of 6 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, Vision, and Factuality.
Claude Fable 5.1 or Grok 4.3 for General LLM?
As of Oct 15, 2026, Claude Fable 5.1 leads Grok 4.3 in General LLM at #6 against #85.
Claude Fable 5.1 or Grok 4.3 for Reasoning?
As of Oct 15, 2026, Claude Fable 5.1 leads Grok 4.3 in Reasoning at #5 against #96.
Claude Fable 5.1 or Grok 4.3 for Coding › Web dev?
As of Oct 15, 2026, Claude Fable 5.1 leads Grok 4.3 in Coding › Web dev at #5 against #95.