Claude Fable 5 vs Gemini 3.8 Flash
As of Oct 14, 2026, Claude Fable 5 leads Gemini 3.8 Flash in 8 of 10 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, and Factuality.
Claude Fable 5
Close. Near-SOTA in General LLM, rank #3.
Gemini 3.8 Flash
Yes. Yes on General LLM (best per dollar); Reasoning (best per dollar). Not the overall leader.
| Category | Claude Fable 5 | Gemini 3.8 Flash |
|---|---|---|
| General LLM | #3 · Near-SOTA · General LLM Margin 2.040816326530617 LMArena leaderboard dataset · Oct 13, 2026 | #7 · Was SOTA · General LLM Margin 4.761904761904759 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #3 · Near-SOTA · Reasoning Margin 2.7397260273972535 LMArena leaderboard dataset · Oct 13, 2026 | #6 · #6 in Reasoning Margin 4.794520547945211 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #5 · #5 in Math Margin 8.888888888888886 Epoch AI benchmarking hub · Sep 2, 2026 |
| Science | #56 · #56 in Science Margin — Epoch AI benchmarking hub · Jun 9, 2026 | #4 · #4 in Science Margin — Epoch AI benchmarking hub · Sep 2, 2026 |
| Coding | #6 · #6 in Coding Margin 31.818181818181813 Terminal-Bench Harbor Hub · Oct 6, 2026 | #15 · #15 in Coding Margin 72.72727272727272 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #6 · #6 in Coding › Agentic Margin 31.818181818181813 Terminal-Bench Harbor Hub · Oct 6, 2026 | #15 · #15 in Coding › Agentic Margin 72.72727272727272 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Web dev | #17 · Was SOTA · Coding › Web dev Margin 14.953271028037378 LMArena leaderboard dataset · Oct 13, 2026 | #27 · #27 in Coding › Web dev Margin 24.29906542056075 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #3 · Near-SOTA · Long context Margin 2.040816326530603 LMArena leaderboard dataset · Oct 13, 2026 | #5 · Near-SOTA · Long context Margin 3.401360544217681 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #5 · Was SOTA · Vision Margin 15.78947368421052 Epoch AI benchmarking hub · Jun 9, 2026 | #15 · #15 in Vision Margin 42.10526315789474 Epoch AI benchmarking hub · Sep 2, 2026 |
| Factuality | #7 · Was SOTA · Factuality Margin 5.97014925373135 LMArena leaderboard dataset · Oct 13, 2026 | #17 · #17 in Factuality Margin 13.43283582089552 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jun 9, 2026 | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 2, 2026 |
Claude Fable 5: $20 per 1M blended tokens.
Gemini 3.8 Flash: $1.5 per 1M blended tokens.
Claude Fable 5: closed weights.
Gemini 3.8 Flash: closed weights.
General LLM: As of Oct 14, 2026, Claude Fable 5 leads Gemini 3.8 Flash in General LLM at #3 against #7.
Reasoning: As of Oct 14, 2026, Claude Fable 5 leads Gemini 3.8 Flash in Reasoning at #3 against #6.
Science: As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Fable 5 in Science at #4 against #56.
Coding: As of Oct 14, 2026, Claude Fable 5 leads Gemini 3.8 Flash in Coding at #6 against #15.
Coding › Agentic: As of Oct 14, 2026, Claude Fable 5 leads Gemini 3.8 Flash in Coding › Agentic at #6 against #15.
Coding › Web dev: As of Oct 14, 2026, Claude Fable 5 leads Gemini 3.8 Flash in Coding › Web dev at #17 against #27.
Long context: As of Oct 14, 2026, Claude Fable 5 leads Gemini 3.8 Flash in Long context at #3 against #5.
Vision: As of Oct 14, 2026, Claude Fable 5 leads Gemini 3.8 Flash in Vision at #5 against #15.
Factuality: As of Oct 14, 2026, Claude Fable 5 leads Gemini 3.8 Flash in Factuality at #7 against #17.
Abstraction (ARC): As of Oct 14, 2026, Claude Fable 5 and Gemini 3.8 Flash share #1 in Abstraction (ARC).
Claude Fable 5 · Gemini 3.8 Flash
Claude Fable 5 or Gemini 3.8 Flash?
As of Oct 14, 2026, Claude Fable 5 leads Gemini 3.8 Flash in 8 of 10 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, and Factuality.
Claude Fable 5 or Gemini 3.8 Flash for General LLM?
As of Oct 14, 2026, Claude Fable 5 leads Gemini 3.8 Flash in General LLM at #3 against #7.
Claude Fable 5 or Gemini 3.8 Flash for Reasoning?
As of Oct 14, 2026, Claude Fable 5 leads Gemini 3.8 Flash in Reasoning at #3 against #6.
Claude Fable 5 or Gemini 3.8 Flash for Science?
As of Oct 14, 2026, Gemini 3.8 Flash leads Claude Fable 5 in Science at #4 against #56.