Claude Fable 5.1 vs Step 5 Preview
As of Oct 14, 2026, Claude Fable 5.1 leads Step 5 Preview in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Fable 5.1
Yes. SOTA in co-SOTA in Factuality.
Step 5 Preview
#31 Best current rank: #31 in Coding › Web dev, as of Oct 14, 2026.
| Category | Claude Fable 5.1 | Step 5 Preview |
|---|---|---|
| General LLM | #6 · Was SOTA · General LLM Margin 4.08163265306122 LMArena leaderboard dataset · Oct 13, 2026 | #60 · #60 in General LLM Margin 40.816326530612244 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #5 · Was SOTA · Reasoning Margin 4.109589041095887 LMArena leaderboard dataset · Oct 13, 2026 | #49 · #49 in Reasoning Margin 34.246575342465746 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 3.738317757009341 LMArena leaderboard dataset · Oct 13, 2026 | #31 · #31 in Coding › Web dev Margin 28.037383177570092 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #6 · Was SOTA · Long context Margin 4.08163265306122 LMArena leaderboard dataset · Oct 13, 2026 | #56 · #56 in Long context Margin 38.095238095238095 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 | #57 · #57 in Factuality Margin 43.28358208955224 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.
Step 5 Preview: $1.4249999999999998 per 1M blended tokens.
Claude Fable 5.1: closed weights.
Step 5 Preview: closed weights.
General LLM: As of Oct 14, 2026, Claude Fable 5.1 leads Step 5 Preview in General LLM at #6 against #60.
Reasoning: As of Oct 14, 2026, Claude Fable 5.1 leads Step 5 Preview in Reasoning at #5 against #49.
Coding › Web dev: As of Oct 14, 2026, Claude Fable 5.1 leads Step 5 Preview in Coding › Web dev at #5 against #31.
Long context: As of Oct 14, 2026, Claude Fable 5.1 leads Step 5 Preview in Long context at #6 against #56.
Factuality: As of Oct 14, 2026, Claude Fable 5.1 leads Step 5 Preview in Factuality at #1 against #57.
Claude Fable 5.1 · Step 5 Preview
Claude Fable 5.1 or Step 5 Preview?
As of Oct 14, 2026, Claude Fable 5.1 leads Step 5 Preview in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Fable 5.1 or Step 5 Preview for General LLM?
As of Oct 14, 2026, Claude Fable 5.1 leads Step 5 Preview in General LLM at #6 against #60.
Claude Fable 5.1 or Step 5 Preview for Reasoning?
As of Oct 14, 2026, Claude Fable 5.1 leads Step 5 Preview in Reasoning at #5 against #49.
Claude Fable 5.1 or Step 5 Preview for Coding › Web dev?
As of Oct 14, 2026, Claude Fable 5.1 leads Step 5 Preview in Coding › Web dev at #5 against #31.