# Claude Fable 5.1 vs Claude Sonnet 5

As of Oct 15, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in 7 of 7 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, and Factuality.

Claude Fable 5.1: $20 per 1M blended tokens.

Claude Sonnet 5: $4.000000000000001 per 1M blended tokens.

Claude Fable 5.1: closed weights.

Claude Sonnet 5: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in General LLM at #6 against #50.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in Reasoning at #5 against #40.
- Which to pick, Coding: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in Coding at #3 against #19.
- Which to pick, Coding › Agentic: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in Coding › Agentic at #3 against #19.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in Coding › Web dev at #5 against #40.
- Which to pick, Long context: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in Long context at #6 against #36.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Sonnet 5 in Factuality at #1 against #56.

As of Oct 15, 2026, Claude Fable 5.1 is tied for state of the art in Factuality (since Oct 2, 2026; sources LMArena Text factuality; methodology v1.0).

As of Oct 15, 2026, Claude Sonnet 5 is ranked #19 in Coding (since Oct 15, 2026; sources Terminal-Bench 4.0; methodology v1.0).