# Claude Fable 5.1 vs GPT-5.5 Instant

As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.5 Instant in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Factuality.

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

GPT-5.5 Instant: price per 1M tokens is unset in the catalog.

Claude Fable 5.1: closed weights.

GPT-5.5 Instant: closed weights.

- Which to pick, General LLM: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.5 Instant in General LLM at #6 against #31.
- Which to pick, Reasoning: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.5 Instant in Reasoning at #5 against #33.
- Which to pick, Long context: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.5 Instant in Long context at #6 against #39.
- Which to pick, Factuality: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.5 Instant in Factuality at #1 against #64.

As of Oct 14, 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 14, 2026, GPT-5.5 Instant is ranked #31 in General LLM (since Oct 14, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).