Claude Fable 5.1 vs DeepSeek V4.1 Flash
As of Oct 15, 2026, Claude Fable 5.1 leads DeepSeek V4.1 Flash in 7 of 7 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, Vision, Factuality, and Abstraction (ARC).
Claude Fable 5.1
Yes. SOTA in Factuality (tied).
DeepSeek V4.1 Flash
Yes. Yes on General LLM (best per dollar); Reasoning (best per dollar). Not the overall leader.
| Category | Claude Fable 5.1 | DeepSeek V4.1 Flash |
|---|---|---|
| General LLM | #6 · Near-SOTA · General LLM Margin 3.191489361702125 LMArena leaderboard dataset · Oct 13, 2026 | #32 · #32 in General LLM Margin 17.02127659574468 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #5 · Near-SOTA · Reasoning Margin 3.191489361702125 LMArena leaderboard dataset · Oct 13, 2026 | #29 · #29 in Reasoning Margin 15.957446808510639 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 | — | #36 · #36 in Science Margin — Epoch AI benchmarking hub · Sep 9, 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 | #21 · #21 in Coding › Web dev Margin 16 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #6 · Near-SOTA · Long context Margin 3.1914893617021107 LMArena leaderboard dataset · Oct 13, 2026 | #37 · #37 in Long context Margin 19.68085106382979 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #6 · #6 in Vision Margin 18.421052631578945 Epoch AI benchmarking hub · Sep 1, 2026 | #21 · #21 in Vision Margin 57.89473684210526 Epoch AI benchmarking hub · Sep 9, 2026 |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #25 · #25 in Factuality Margin 15.116279069767444 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 1, 2026 | #8 · #8 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 9, 2026 |
Claude Fable 5.1: $20 per 1M blended tokens.
DeepSeek V4.1 Flash: $0.23463 per 1M blended tokens.
Claude Fable 5.1: closed weights.
DeepSeek V4.1 Flash: open weights.
General LLM: As of Oct 15, 2026, Claude Fable 5.1 leads DeepSeek V4.1 Flash in General LLM at #6 against #32.
Reasoning: As of Oct 15, 2026, Claude Fable 5.1 leads DeepSeek V4.1 Flash in Reasoning at #5 against #29.
Coding › Web dev: As of Oct 15, 2026, Claude Fable 5.1 leads DeepSeek V4.1 Flash in Coding › Web dev at #5 against #21.
Long context: As of Oct 15, 2026, Claude Fable 5.1 leads DeepSeek V4.1 Flash in Long context at #6 against #37.
Vision: As of Oct 15, 2026, Claude Fable 5.1 leads DeepSeek V4.1 Flash in Vision at #6 against #21.
Factuality: As of Oct 15, 2026, Claude Fable 5.1 leads DeepSeek V4.1 Flash in Factuality at #1 against #25.
Abstraction (ARC): As of Oct 15, 2026, Claude Fable 5.1 leads DeepSeek V4.1 Flash in Abstraction (ARC) at #3 against #8.
Claude Fable 5.1 · DeepSeek V4.1 Flash
Claude Fable 5.1 or DeepSeek V4.1 Flash?
As of Oct 15, 2026, Claude Fable 5.1 leads DeepSeek V4.1 Flash in 7 of 7 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, Vision, Factuality, and Abstraction (ARC).
Claude Fable 5.1 or DeepSeek V4.1 Flash for General LLM?
As of Oct 15, 2026, Claude Fable 5.1 leads DeepSeek V4.1 Flash in General LLM at #6 against #32.
Claude Fable 5.1 or DeepSeek V4.1 Flash for Reasoning?
As of Oct 15, 2026, Claude Fable 5.1 leads DeepSeek V4.1 Flash in Reasoning at #5 against #29.
Claude Fable 5.1 or DeepSeek V4.1 Flash for Coding › Web dev?
As of Oct 15, 2026, Claude Fable 5.1 leads DeepSeek V4.1 Flash in Coding › Web dev at #5 against #21.