Claude Fable 5.1 vs Gemini 2.5 Flash
As of Oct 15, 2026, Claude Fable 5.1 leads Gemini 2.5 Flash in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Fable 5.1
Yes. SOTA in co-SOTA in Factuality.
Gemini 2.5 Flash
#90 Best current rank: #90 in Factuality, as of Oct 15, 2026.
| Category | Claude Fable 5.1 | Gemini 2.5 Flash |
|---|---|---|
| General LLM | #6 · Near-SOTA · General LLM Margin 3.191489361702125 LMArena leaderboard dataset · Oct 13, 2026 | #139 · #139 in General LLM Margin 73.93617021276596 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #5 · Near-SOTA · Reasoning Margin 3.191489361702125 LMArena leaderboard dataset · Oct 13, 2026 | #148 · #148 in Reasoning Margin 79.25531914893617 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 |
| 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 | — |
| Long context | #6 · Near-SOTA · Long context Margin 3.1914893617021107 LMArena leaderboard dataset · Oct 13, 2026 | #138 · #138 in Long context Margin 73.40425531914894 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 | #90 · #90 in Factuality Margin 52.906976744186046 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.
Gemini 2.5 Flash: $0.85 per 1M blended tokens.
Claude Fable 5.1: closed weights.
Gemini 2.5 Flash: closed weights.
General LLM: As of Oct 15, 2026, Claude Fable 5.1 leads Gemini 2.5 Flash in General LLM at #6 against #139.
Reasoning: As of Oct 15, 2026, Claude Fable 5.1 leads Gemini 2.5 Flash in Reasoning at #5 against #148.
Long context: As of Oct 15, 2026, Claude Fable 5.1 leads Gemini 2.5 Flash in Long context at #6 against #138.
Factuality: As of Oct 15, 2026, Claude Fable 5.1 leads Gemini 2.5 Flash in Factuality at #1 against #90.
Claude Fable 5.1 · Gemini 2.5 Flash
Claude Fable 5.1 or Gemini 2.5 Flash?
As of Oct 15, 2026, Claude Fable 5.1 leads Gemini 2.5 Flash in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Fable 5.1 or Gemini 2.5 Flash for General LLM?
As of Oct 15, 2026, Claude Fable 5.1 leads Gemini 2.5 Flash in General LLM at #6 against #139.
Claude Fable 5.1 or Gemini 2.5 Flash for Reasoning?
As of Oct 15, 2026, Claude Fable 5.1 leads Gemini 2.5 Flash in Reasoning at #5 against #148.
Claude Fable 5.1 or Gemini 2.5 Flash for Long context?
As of Oct 15, 2026, Claude Fable 5.1 leads Gemini 2.5 Flash in Long context at #6 against #138.